pengetahuan and elektronika

Create vocational students Cheap Air Purifier

2010-11-26T12:39:00.003+07:00

Create vocational students Cheap Air Purifier - Water crisis faced by people in various areas addressed by the students of SMK Negeri Sukabumi. The students from the Department of Mechanical Engineering, Automotive, Electrical, and Assembly jointly make some equipment to accommodate the water and clear it. These tools have not produced even though expensive, the price is much cheaper than the same tool on the market.

Ujang Solah a student Department of Automotive Grade 3 smkn Sukabumi revealed, it's been a lot of contaminated water in some areas. As a result of water consumed is not feasible because it can cause health problems. And one of the steps taken by CMS students is to make equipment to clear water called Resevoirkosmusi

"This tool can help clear up water containing iron, metal and so on. For the first phase we only create a tool that is able to purify the water as much as 10 gallons," Ujang said when met at the sidelines of the exhibition last day of the Expo West Java Vocational Education in BPPTKPK Street Hero, Thursday (25/11).

According Ujang, student work is able to purify water until suitable for consumption. One tool is worth USD 2 million. Far cheaper than the same tool on the market price of Rp 5 million. In addition to purification equipment, students also designed the bunker-like shelter that berfugsi to accommodate the rain water for everyday purposes.

"Bunker can be built under the house, beside the house or where ever there is still land around the house. Useful for rain water that falls can be reused for domestic purposes such as washing, watering plants, even to cook. We're up the design and can be applied in homes, "he explained.

Another work of these students are anti-theft alarm. Alarms could be placed on windows, entrances, gates, and even roofs. This alarm system Model pengoperasionalannya almost the same as those sold in the market.

Humidity Soil Test

2009-08-06T19:00:00.003+07:00

Humidity Soil Test - This indicator is called a series of soil moisture because this tool can be used to determine water content in soil or soil moisture. How to use this tool is very simple, namely: probe inserted in the soil near the plant that will be reviewed. LED will flash if the humidity does not work enough and if the humidity is less. Probe can be made from copper wire that dikelupas skins, probe length of approximately 100-150mm. LED should be inverted installation.

Components needed:

R 1 = 100ohm
R 2 = 10Kohm
R 3 = 100Kohm
R 4 = 1Kohm
R 5 = 100Kohm
R 6 = 39ohm
Rv = 10K
Tr 1 = BC548
Tr 2 = BC558
LED

by enrick-tronika

Bird Sound Door Bell

2009-08-06T18:57:00.001+07:00

Bird Sound Door Bell - Friends may be bored listening to the sound only monoton bell at home, if you make a doorbell iongin with other sound you can try to make a sound with the series of birds. This series is quite simple and PCB is available at many electronics stores.

Components needed:

Resistor (R) 1 = 100Kohm
Resistor (R) 2 = 5K6
Resistor (R) 3 = 5ohm
VR = 10K
Capasitor (C) 1 = 47nF
Capasitor (C) 2 = 20nF
Capasitor (C) 3 = 100uF
Capasitor (C) 4 = 0nF
Capasitor (C) 5 = 10uF
Capasitor (C) 6 = 1uF
Transistor (TR) 1 = BC109
Transistor (TR) 2 = AC128
Speaker (LS) = 8ohm

Happy trying!!!

by enrick-tronika

ELECTRICITY # 4 (Macam-Macam The Electric Energy)

2009-08-06T18:54:00.002+07:00

ELECTRICITY # 4 (Macam-Macam The Electric Energy) - Electricity can be generated through various processes.

Such as the following:

chemical processes, examples and bateray = aki
mechanical process, for example = bicycle dynamo and generator

by enrick-tronika

ELECTRIC # 3 (Benefits)

2009-08-06T18:53:00.002+07:00

ELECTRIC # 3 (Benefits) - Electricity numerous benefits for people, for example.

Used in many household.

light
fan angina
radio
refrigerator
and others

by enrick-tronika

ELECTRICITY # 2 (Power Series)

2009-08-06T18:50:00.003+07:00

ELECTRICITY # 2 (Power Series) - Electricity can be divided into a series of three.

Namely:

series series
series of parallel
mix series

Materials that can send electric current is called the conductor, who are not able to dispatch electric current is called the insulator.

by enrick-tronika

ELECTRICITY # 1 (Type-Type of Electricity)

2009-08-06T18:41:00.001+07:00

ELECTRICITY # 1 (Type-Type of Electricity) - Electricity can be divided into two.

Namely:

static electricity (silent)
power dynamic (moving)

In the dynamic electricity, electric current flows from the positive pole (high potential) to the negative pole (low potential) and only flows in a closed series.

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About Robot's

2009-07-26T20:07:00.001+07:00

General meaning of the robot is a machine that can be programmed to mimic the action or the appearance of a creature that normally intelligent people. For it can be said as a robot, it must be able to:

Detect and respond (to receive information about)
Working on tasks that vary
Re-programmed for different tasks
Working independently or interact with human

Own robot technology developed in line with human needs, the application of the robot is usually dilingkungan 4D and 4A has a duty
4D:

Dengerous
Dirty
Dull
Difficult

4A:

Automation
Augmentation
Assistance
Autonomous

Generally, robots are categorized in several types below:

Wheeled robots
Legged robot
Aaerial robot
Humanoid robot

by enrick-tronika

The process of evocation Energy Power Sun # 5

2009-07-26T20:05:00.000+07:00

Bateray
Bateray is a tool to save electricity with the chemical reaction process, which at the time of charging, the energy converted into electrical energy and chemicals at the time of discharge or, chemical energy converted into electrical energy. Bateray consists of two kinds, namely, bateray dry and wet bateray.
Bateray wet consists of several components, including:

box bateray
terminal bateray
liquid electrolyte
close bateray
cells bateray

bateray in one of several bateray cells, each cell produces voltage 2 to 2.2 Volt. 6 Volt Bateray consists of 3 cells and 12 Volt bateray consists of 6 cells bateray in the cluster series.

by enrick-tronika

The process of evocation Energy Power Sun # 4

2009-07-26T20:04:00.000+07:00

Inventer
Inventer is a series of electronic flow direction change (DC) to flow back and forth (AC). Inventer can also be used to provide electrical power back and forth from the solar cell power source.
Type inventer existing dipasaran are:

Inventer mechanical
Square wave inventer
Trapezium wave inventer
Sine wave inventer

by enrick-tronika

The process of evocation Energy Power Sun # 3

2009-07-26T20:02:00.000+07:00

Regulator
Settings bateray when to charge and when charging for and must be stopped when the relationship to the burden should be decided on solar power (PLTS), is done automatically by using a tool called a regulator. Basically the only regulator to set up an electronic switch automatically. Type of regulator that is made up of two types of regulators, namely parallel and series regulators.

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The process of evocation Energy Power Sun # 2

2009-07-26T20:01:00.001+07:00

Solar Cell
Solar cell photovoltaicatau often called solar generator, which is a semi-conductor equipment where the absorption of solar rays will cause a cargo-load electricity. Type of semi-conductor material is widely used to make solar cell is:

Element Silicon (Si)
Compound cadmium sulfide (CDS)
Cuprous sulfide (Cu2S)
Cadmium telleuride (CdTe)
Gallium arsenide (GaAs)

How solar cells work is by using the theory of light as particles. As well known that light and that does not appear to have a look that is the nature of the two waves and as particles or as a term known as the photon.

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The process of evocation Energy Power Sun # 1

2009-07-26T19:59:00.001+07:00

Power Efficiency
To obtain energy-wise suryasebiak the solar cell must be driven perpendicular to the sun. Energy conversion efficiency of solar cell is the percentage of the division of power terkonversi (absorption of sunlight into electricity) with the power collected at the solar cell is connected with a series of electricity.

by enrick-tronika

Utilization of Solar Energy Being Electricity (Electrical Energy Pembangkit)

2009-07-26T19:53:00.002+07:00

Basic principles konvesi sun's energy into electricity ialahsaat include the absorption of the sun to semi-conductor material, which then occurs and the separation of generation and load are positive on two separate regions of the solar cell is a potential cause of the solar cell, which then mentransferkan separate cargo-load is through the terminal to load electricity for use outside in the form of electric current and the electric current generated is direct current (DC).
Generated electricity stored in bateray then changed to flow back and forth (AC) using a tool called inventer, so that the exit flow can be directly used for equipment that uses electricity flow back and forth (AC).

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Radio Telephony

2009-07-19T00:28:00.000+07:00

Radio telephony with this kind of walky Talky, can be used to communicate or talk with other people with a sufficient distance away. But the condition is a need to create one or more pairs. The higher the antenna that you pasan, the remote power pancarnya.
Components needed:

RFC reel itself is made without a core ferit have koker O = 0.5 cm large wires
Transistor (TR) 1 = 2SA104
Transistor (TR) 2 = SB54
Transistor (TR) 3 = SB54
Resistor (R) 1 = 100ohm / 0.5 watt
Resistor (R) 2 = 4K7ohm / 0.5 watt
Resistor (R) 3 = 4K7ohm / 0.5 watt
Resistor (R) 4 = 270Kohm / 0.5 watt
Resistor (R) 5 = 400ohm / 0.5 watt
Resistor (R) 6 = 35Kohm / 0.5 watt
Resistor (R) 7 = 390ohm / 0.5 watt
Resistor (R) 8 = 120ohm / 0.5 watt
Resistor (R) 9 = 4K7ohm / 0.5 watt
Condensator (C) 1 = 30uF/10 Volt
Condensator (C) 2 = 0.05 UF
Condensator (C) 3 = 1uF/10 Volt
Condensator (C) 4 = 0.02 UF
Condensator (C) 5 = 0.02 UF
Condensator (C) 6 = 20pF
Condensator (C) 7 = 0.04 UF
Spoel antenna with koker diameter0, 8 with stem ferit
Antenna with a minimum height of 5 meters
9 Volt output transformer
Loudspeaker (LS) = 8ohm
Batteray / Accu = 6 - 9 Volt
Mic or condenser microphone that can be used
Push the switch many-legged

by enrick-tronika

Simple Amplifier

2009-07-19T00:26:00.000+07:00

Simple amplifier, the following series of simple but despite this the results will be satisfactory. That are important in pembuatannya you must carefully and correctly.
Components needed:

Transistor (TR) 1 = BC107B
Transistor (TR) 2 = BC190B
Transistor (TR) 3 = 2SB175
Transistor (TR) 4 = AC127
Condensator (C) 1 = 0.1 UF
Condensator (C) 2 = 0.1 UF
Condensator (C) 3 = 220uF/16 Volt
Condensator (C) 4 = 1000uF
Resistor (R) 1 = 4K7ohm
Resistor (R) 2 = 10Mohm
Resistor (R) 3 = 100Kohm
Resistor (R) 4 = 3K3ohm
Resistor (R) 5 = 220Kohm
Resistor (R) 6 = 1Kohm
Potensiometer = 48Kohm
Voltage DV = 8 Volt

by enrick-tronika

Power suppliers

2009-07-19T00:25:00.000+07:00

Power is a series of suppliers who work to change the AC voltage into DC. So you can make whatever purposes. Similar to a power supply adapter, power supply, but the difference does not produce noise, braming and haming. So the flow of input power is still fine, as batteray or Accu.
Components needed:

Transistor (TR) = BC1078 IC or use the normal power supply
Transformer input = 240Volt or 12 Volt
Dioda (D) 1 = W005
Dioda (D) 2 = W005
Dioda (D) 3 = W005
Dioda (D) 4 = W005
Dioda (D) 5 = TIL223
Condensator (C) 1 = 0.22 UF
Condensator (C) 2 = 1000uF
Condensator (C) 3 = 10uF
Condensator (C) 4 = 1uF
Condensator (C) 5 = 0.1 UF
Resistor (R) 1 = 1K2ohm
Resistor (R) 2 = 69ohm
Resistor (R) 3 = 470ohm
Resistor (R) 4 = 470ohm
Resistor (R) 5 = 1.5 ohm
Resistor (R) 6 = 62Kohm
Resistor (R) 7 = 1K5ohm
Resistor (R) 8 = 62ohm
Resistor (R) 9 = 240ohm
Switch size of 240 Volt
Require flow PLN up to 240 Volt

by enrick-tronika

Rangkaian Alarm Anti Thieves

2009-07-19T00:23:00.001+07:00

One set of electronics that this will work and produce a sound that goes sirine around 2 to 3 seconds. If you attach dipintu and the door is opened without the permission of the host, then this tool will give a sign that there is someone who seeks entry. If you install any dipintu car as well. And will depend on your needs.
Components needed:

Horn used for normal purposes alarm
Transistor (TR) 1 = 4011
Transistor (TR) 2 = 4011
Transistor (TR) 3 = BC107
Transistor (TR) 4 = BC107
Dioda (D) 1 = 4148
Dioda (D) 2 = 4001
Resistor (R) 1 = 470Kohm
Resistor (R) 2 = 10Kohm
Resistor (R) 3 = 2K7ohm
Resistor (R) 4 = 10Kohm
Resistor (R) 5 = 2ohm
Resistor (R) 6 = 5ohm
Resistor (R) 7 = --
Condensator (C) 1 = 10uF
Condensator (C) 2 = 1nF
Condensator (C) 3 = 47uF
Condensator (C) 4 = 47uF
Condensator (C) 5 = = 33uF

by enrick-tronika

Vote up Tool Drum

2009-07-19T00:21:00.001+07:00

Below you will see the components needed to set up sound equipment drum. If you work up correctly, the electronics goods will generate drum sound. So you can already hear the drum sound without having to buy the drum.
Components needed:

Two types of transistors Tun
Resistor (R) 1 = 10Kohm
Resistor (R) 2 = 10Kohm
Resistor (R) 3 = 100Kohm
Resistor (R) 4 = 10Kohm
Resistor (R) 5 = 570Kohm
Resistor (R) 6 = 27Kohm
Resistor (R) 7 = 270Kohm
Resistor (R) 8 = 2K9ohm
Resistor (R) 9 = 1Kohm
Resistor (R) 10 = 1Kohm
Resistor (R) 11 = 15Kohm
Resistor (R) 12 = 14Kohm
Resistor (R) 13 = 10Kohm
Resistor (R) 14 = 10Kohm
Resistor (R) 15 = 100Kohm
Resistor (R) 16 = 550Kohm
Resistor (R) 17 = 270Komh
Resistor (R) 18 = 2K7ohm
Relay maximum 18Kohm or 1Volt
Batteray = 15 - 24Volt / 5 MA
Loudspeaker (LS) = 8ohm

After you complete all the components above, then flee to experiment. A requirement that you must remember, that once you do - desperate times. if you've finished up but still not beep, then there is a mistake that you do.

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Pre-Amp Voltage Low

2009-07-19T00:19:00.002+07:00

To create a simple pre-amp is built in a way that's simple too. This series may not generate noise a bit.
Components needed:

Transistor (TR) 1 = 2N2484
Transistor (TR) 2 = 2N2484
Condensator (C) 1 = 1uF
Condensator (C) 2 = 1uF
Condensator (C) 3 = 70pF
Condensator (C) 4 = 100uF
Condensator (C) 5 = 47uF
Resistor (R) 1 = 240Kohm or 220Kohm
Resistor (R) 2 = 1Kohm
Resistor (R) 3 = 100Kohm
Resistor (R) 4 = 660ohm
Resistor (R) 5 = 4K7ohm
Resistor (R) 6 = 2K2ohm
Resistor (R) 7 = 680ohm
Resistor (R) 8 = 220Kohm

Pre-Amp will produce more or less voltage DC 15Volt. The frequency 25hz reach up to 26Khz, or 3dB.

by enrick-tronika

A Power Source

2009-07-19T00:16:00.000+07:00

Power that you make under this exercise is a simple type only. Cash generated can reach 60MA.
Components needed:

Transistor (TR) 1 = BC178
Transistor (TR) 2 = 2N3055
Other components = CA3085
Dioda (D) 1 = B4126
Dioda (D) 2 = B4126
Resistor (R) 1 = 1Kohm
Resistor (R) 2 = 100ohm
Resistor (R) 3 = 47Kohm
Resistor (R) 4 = 9ohm
Resistor (R) 5 = 1ohm/1watt
Resistor (R) 6 = 1Kohm
Resistor (R) 7 = 330ohm
Condensator (C) 1 = 100uF
Condensator (C) 2 = 10uF
Condensator (C) 3 = 100uF
Condensator (C) 4 = --
MF output size in common use

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Up Walky Talky

2009-07-16T11:18:00.001+07:00

Walky Talky is a similar means of communication that we can use to talk long distance with other people. Walky Talky Tantu just made this one pair.
Components needed:

Transistor (TR) 1 = 2SA102
Transistor (TR) 2 = 2SB75
Condensator (C) 1 = 30uF
Condensator (C) 2 = 470uF
Condensator (C) 3 = RFC
Condensator (C) 4 = 0.002 UF
Resistor (R) 1 = 47ohm
Resistor (R) 2 = 470Kohm
Resistor (R) 3 = 10Kohm
Resistor (R) 4 = 22Kohm
Resistor (R) 5 = 22Kohm
Resistor (R) 6 = 220Kohm
MF 1 = coil 1K
MF = 2 twist 20K and 2K
MF 3 = Purchase of common use
RFC = size-free
Loudspeaker (LS) = 8ohm
Trimer 1 = 30pF
Trimer 2 = 30pF
Bateray = 9 - 12volt

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Tension tester tool

2009-07-16T11:16:00.000+07:00

Prober voltage we can arrange this yourself or our own raft. And how easily the necessary components available ditoko enough.
Components needed:

Transistor (TR) 1 = BC109C
Transistor (TR) 2 = BC109C
Dioda (D) 1 = IN4003
Dioda (D) 2 = IN4003
Dioda (D) 3 = IN4003
Dioda (D) 4 = 220
Resistor (R) 1 = 15Kohm
Resistor (R) 2 = 1Kohm
Resistor (R) 3 = 330ohm
Bateray = 9volt

by enrick-tronika

refine Nois

2009-07-16T11:13:00.000+07:00

Nois means rough voice of the radio receiver. If the component is added, then the signal that is broadcast over 67Khz akan fair and noisnya lost. This tool often used by radio fans amatiryang work on 80meter band. Nois with the reducer installed on the radio this reicever they will be easier to communicate with opponents who are talking far away place.
Components needed:

Condensator (C) 1 = 4p7
Condensator (C) 2 = 470nF
Condensator (C) 3 = 470nF
Condensator (C) 4 = 470nF
Condensator (C) 5 = 100nF
Condensator (C) 6 = 6n8
Condensator (C) 7 = 10nF
Condensator (C) 8 = 3n3
Resistor (R) 1 = 5K6ohm
Resistor (R) 2 = 12Kohm
Resistor (R) 3 = 6K8ohm
Resistor (R) 4 = 150Kohm
Resistor (R) 5 = 120Kohm
Resistor (R) 6 = 4K7ohm
Resistor (R) 7 = 4K7ohm
Resistor (R) 8 = 4K7ohm
Resistor (R) 9 = 4K7ohm
Resistor (R) 10 = 3K9ohm
Transistor (TR) 1 = BC109
Transistor (TR) 2 = BC109
Condensator (C) = 10uF

by enrick-tronika

Auto Bell

2009-07-16T11:11:00.001+07:00

Bel is automatic with electronic buzzer that made by most of the people or the bell house loudspeaker then click once inside the ring. How it works is similar to automatic bell as weker. Button is pressed now, then an hour a new ring. Thus, the automatic bell this tool can be used as a reminder time.
Kopmponen needed:

Transistor (TR) 1 = BC109 or similar
Transistor (TR) 2 = BC109 or similar
Resistor (R) 1 = 2Mohm
Resistor (R) 2 = 1Mohm
Resistor (R) 3 = 1Mohm
Resistor (R) 4 = 4K7ohm
Resistor (R) 5 = 10Kohm
Resistor (R) 6 = 150Kohm
Resistor (R) 7 = 100ohm
Condensator (C) 1 = 470uF
Condensator (C) 2 = 470uF
Condensator (C) 3 = 100uF
Condensator (C) 4 = 1uF
Loudspeaker (LS) = 8ohm
Bateray = 3volt

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Make a lamp Kerdip

2009-07-10T12:33:00.000+07:00

Kerdip lamp is the lamp that lights switch-gantian. Making light kerdip such as this one simple way perakitannya, in addition to the components that needed quite a bit. This lamp can be made kerdip toys or placed elsewhere where a sufficient match.
Components needed:

Transistor (TR) 1 = BC107
Transistor (TR) 2 = BC107
Resistor (R) 1 = 1.2 Kohm
Resistor (R) 2 = 1.2 Kohm
Condensator (C) 1 = 470uF
Condensator (C) 2 = 470uF
Two lamps = 2.5 volt
Bateray = 2.5 volt

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Make Traffic Lights

2009-07-10T12:31:00.001+07:00

The form of this exercise, called traffic light up. How to make it only needs two transistor.
Components needed:

Transistor (TR) 1 = BC108
Transistor (TR) 2 = BC108
Resistor (R) 1 = 8K2ohm
Resistor (R) 2 = 270Kohm
Resistor (R) 3 = 270Kohm
Resistor (R) 4 = 8K2ohm
Resistor (R) 5 = 220ohm
Resistor (R) 6 = 220ohm
Resistor (R) 7 = 220ohm
Condensator (C) 1 = 4uF
Condensator (C) 2 = 4uF
IC = IC7493
Three colored lights of red, yellow, green
Three dioda the size is not specified

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Create Alarm Chip

2009-07-10T12:29:00.001+07:00

Chip alarm or an alarm that produces sounds like a normal sirine used polosi road can be made with a simple way. However, the result will be good if installed carefully and thoroughly.
Components needed:

Transistor (TR) 1 = FCS9012
Transistor (TR) 2 = FCS9012
Resistor (R) 1 = 1Kohm
Resistor (R) 2 = 100Kohm
Resistor (R) 3 = 6.8 Kohm
Resistor (R) 4 = 2.2 Kohm
Resistor (R) 5 = 15Kohm
Resistor (R) 6 = 470ohm
Resistor (R) 7 = 1Kohm
Condensator (C) 1 = 4.7 uF/10V
Condensator (C) 2 = 0.068 uF/25V
Loudspeaker (LS) = 25ohm
Switch at will (freely)
Bateray = DC 9Volt

by enrick-tronika

Bateray Auto Charger

2009-07-10T12:27:00.001+07:00

Bateray charger is often required by amateur radio fans, for the HT power if off. How is the bateray who have no power and then filled with the electricity back through bateray charger. However, although it is not amateur radio fan, or we do not need HT purposes, we can use for radio-radio regular.
Components needed:

Dioda (D) 1 = IN5401
Dioda (D) 2 = IN5401
Dioda SCR (D) 3 = IN5401
Dioda (D) 4 = IN4001
Dioda SCR (D) 5 = IN4001
Condensator (C) = 100uF
Resistor (R) 1 = 30ohm7watt
Resistor (R) 2 = 30ohm7watt
Resistor (R) 3 = 1Kohm0, 6watt
Input transformer
Pilot lights
VR = 500ohm0, 5watt linier
Dioda zener

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Up Short Waves Radio Receiver

2009-07-10T12:21:00.002+07:00

Short wave transistor radio or generally called reserver SW radio waves with a range of 10.8 Mhz. This radio is very simple but can catch the broadcast with a perfect distance. Even fans amateur radio 80meter band SSB often use this as a radio receiver.
Components needed:

Condensator (C) 1 = 220pF
Condensator (C) 2 = 1uF
Condensator (C) 3 = 47uF
Condensator (C) 4 = 47uF
Transistor (TR) 1 = MPF105 or the like
Transistor (TR) 2 = BC108
Coil (L) 1 = email wire commonly used diradio SW
Coil (L) 2 = same as L1
Trimer (T) 1 = 60pF
Trimer (T) 2 = 140pF
Trimer (T) 3 = 10pF
SK1 = socket mounted to the antenna
Antenna requires 5 to 10meter from the land, it is installed outside the house

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Brace up Mikrophone

2009-07-09T17:20:00.001+07:00

Using a microphone that the result is ugly fret. But if you speak using the microphone is good, it makes you sound authoritative. Therefore, to make you sound authoritative then you have to brace up microphone. This is not the amplifier gain additional radio.dengan on this, then your microphone will produce a sound and authoritative mantab.
Components needed:

Transistor (TR) 1 = BC109 or similar
Transistor (TR) 2 = BC109 or similar
Resistor (R) 1 = 680ohm
Resistor (R) 2 = 1Kohm
Resistor (R) 3 = 330Kohm
Resistor (R) 4 = 15Kohm
Resistor (R) 5 = 220Kohm
Resistor (R) 6 = 5Kohm
Condensator (C) 1 = 1uF16V
Condensator (C) 2 = 10uF16V
Condensator (C) 3 = 100uF25V
Condensator (C) 4 = 10uF16V

by enrick-tronika

Radio Intercome up

2009-07-09T17:19:00.000+07:00

Radio intercome many found everywhere, even of late ngebrino already be entrenched in intercome, from big cities to remote villages. Radio intercome this kind of telephone, how to connect the cable line be missed. After learning how the radio up intercome this, then you do not need to purchase the electrical shop, where the price is quite expensive. If you own merakitnya, then will not spend Rp 10.000, - (Indonesian currency) but the result more satisfactory.
Components needed:

Condensator (C) 1 = 0.1 UF
Condensator (C) 2 = 4.7 UF
Condensator (C) 3 = 4.7 UF
Condensator (C) 4 = 0.1 UF
1 = IC LM380 or the like
2 = IC LM380 or the like
Output transformer = 25: 1
Loudspeaker (LS) = speaker used for listening to
Bateray = 8 - 20 Volt

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Aircraft Radio Receiver Without Bateray

2009-07-09T17:14:00.002+07:00

Price component that is required is quite cheap and easily obtainable. While time-use or want to listen we do not buy the struggling bateray, for this model radio memeng without bateray at all. This is simple, there is a radio call as straight. As for the parts that work adala as follows:

Antenna receiver ==> Ring penala ==> Cable ==> Telephone head

Components needed:

Recipient antenna cables can reach a height over 15 meters
Ferit rod antenna and spoel
Condensator variable (C) 1 = 0 - 500uF
Dioda crystal (D) = OA72
Condensator (C) 2 = 100pF
Telephone head = 3Kohm

by enrick-tronika

Up votes crickets

2009-07-09T17:12:00.000+07:00

The sound of crickets your bias and you create a cluster using komponene-electronics components. So you never need to search for hard-hard cricket disawah. With just a switch, then this tool you can use as a mouse repellent. How easy and components diperlukanpun not too expensive.
Components needed:

Bateray = 9 Volt
Resistor (R) 1 = 29ohm
Resistor (R) 2 = 10Kohm
Resistor (R) 3 = 10Kohm
Resistor (R) 4 = 47Kohm
Resistor (R) 5 = 47Kohm
Resistor (R) 6 = 10Kohm
Condensator (C) 1 = 3.3 UF
Condensator (C) 2 = 1uF
Condensator © 3 = 3.3 UF
Loudspeaker (LS) = 3.5 ohm
The output transformer size

by enrick-tronika

Aircraft Radio Receiver up transistors 1

2009-07-09T17:10:00.001+07:00

To make a receiver with a transistor radio with one transisitor is not difficult. And easily obtainable components and relative low cost.
Components needed:

Condensator (C) 1 = 25pF
Condensator (C) 2 = 200pF
Condensator (C) 3 = 500pF
Condensator (C) 4 = 2000pF
Resistor (R) 1 = 47Kohm
Resistor (R) 2 = 10Kohm
Transistor (TR) = AC134
Bateray (S) = 1.5 Volt
Berisolasi PVC wire diameter = 0.5 mm
1 headphone = 3Kohm

by enrick-tronika

Make a Disco Lights

2009-07-09T17:08:00.000+07:00

Create disco lights is not too complicated, as you suspected earlier. Important that you should be patient and never give up as the main stock.
Components needed:

Transformer = 1: 3
Resistor (R) 1 = 5K
Resistor (R) 2 = 10K5W
Transistor (TR) = BC148
Dioda 1 = ST044
Diado 2 = ST044
Electricity = 230 V (AC)
Lamp = 500W Max.

by enrick-tronika

2009-06-27T14:22:00.000+07:00

Even though days of phone pranking are pretty much in the past, this device is still worth making. I am talking about a real-time voice modulator that transforms audio input into the famous "robot voice".

Heart of this device is Holtek HT8950 voice modulator which needs only few external components and a power supply to work. Modulator can be built in a hand held box with a battery or as a desk sitting tool as shown in the picture. As the author states, this integrated circuit offers a lot more than the "robot voice", it can shift audio input two whole octaves in either direction which can be accomplished by pushing appropriate buttons. There is even an mp3 file on the project page with a sample of modulated voice. HT8950 can be purchased on eBay and it is very cheap for hours of fun that you will have with this device.

Repair dead pixels on LCD display

2009-06-25T12:47:00.001+07:00

There is nothing worse than partially working LCD even if just one pixel is is not working. Although this method can not be applied on LCD monitors and larger panels, it gives great results with those small 7-segment and graphical LCDs.

On any display that doesn't use rubber zebra strip, heat seal connector is probably used. Heat seal connector is a self adhesive tape with conductive lines printed on it. With the help of glue on this tape a contact is made with the glass LCD panel. After some time, this glue dries out and it is necessary to re-activate it by using hot air and applying small amount of pressure. Here you can see a successful attempt of fixing a cordless phone's LCD panel using this method. Instead of using hot air, clothing iron can be used as well as soldering iron with a piece of cardboard on it's tip to distribute the pressure evenly.

LED sensor keyboard for a piano

2009-06-15T12:26:00.001+07:00

This is a final project of two students on Cornell university. It is a single octave piano implemented on Atmega664 microcontroller. The interesting thing about this project is the keyboard made out of nothing but LEDs.

Each key consists of 9 LEDs where the middle LED acts as a light sensor. Remaining 8 LEDs are used to light up the fingers. When a finger (or another object) gets close enough, the light reflects from emitting LEDs to middle sensor-LED. The project source code is written in AVR GCC C and is available for download.

LED pushbutton

2009-06-15T12:25:00.002+07:00

There is a bunch of ways on how to make a lit pushbutton. This one has to be the best one so far. A spring that allows an LED to be movable are actually it's pins that are left a bit longer and coiled under the board.

Underneath the LEDs are pushbuttons that LED rests onto. When you press on LED it will press a pushbutton thus making a contact! This is a very good idea for a lit pushbutton!

Solid wood block digital LED clock

2009-06-15T12:23:00.001+07:00

LED clocks are nothing special but this version sure is. In this version of LED clock all that you can see is a block of wood. Front side is drilled almost the whole way through so LEDs shine through the wood itself. This clock is not only a clock, it has an alarm function that will play your favorite radio station when it's time to get up in the morning. Besides that, you can also play games like Pong, Labyrinth and Jump.

Setting the time, alarm and playing games is done with Atari joystick controller. If you don't have Atari controller you can build one with a few pusbuttons. It is built with Arduino board with Atmel microcontroller.

PIC16F877A development and test board

2009-06-15T12:22:00.002+07:00

Here is a very basic PCB layout for a simple PIC16F877A development and testing board. It has a voltage regulator and connector, ability to connect LEDs and inputs (switches) to any PORT, few jumpers and a crystal.

This is very useful for beginners and for prototyping with PIC for those who don't have a more serious development board.

There is also an Eagle version of this PCB with ICSP connector for easy FLASH re-programming.

Wearable LED VU meter

2009-06-15T12:21:00.002+07:00

Here is a very cool device that illuminates 0-10 LEDs depending on ambient sound level. It is a mobile LED VU meter that has integrated microphone that feeds audio signal to LM386 low power audio amplifier. After that, the signal is fed to LM3916 IC which does the job of illuminating appropriate LEDs depending on the audio level.

It was designed to be worn in a nightclub as a replacement for glow sticks and it is powered by 2x3V batteries.

Deaf dog's vibrating collar

2009-06-15T12:19:00.001+07:00

If you have a pet that is loosing his hearing or is completely deaf by now, than you sure need one of these. The idea is to vibrate the motor on dog's neck to get his attention. You will probably need to train your dog a little but he will get the idea pretty quickly. So, it's a Vibrating Caller Collar that is built with RC car's guts: a remote transmitter, receiver and a modified DC motor. The motor needs to be mounted with some kind of off-balanced weight, just like a vibration motor in your mobile phone.

I wish I had one of these a few years ago...

Render PCBs with Eagle layout editor and POV-ray

2009-06-15T12:18:00.002+07:00

Eagle layout editor is an excellent program for schematics and PCBs drawings. By using appropriate scripts, you can transform Eagle into a very powerful piece of software. One of them is Eagle3D that allowes POV file to be generated so that you can see what your device will look like in 3D even before heating up your soldering iron. POV-ray is another piece of software that will render a POV file generated by Eagle3D and it will display the resulting image.

The source link will get you to the whole procedure of generating the POV file and links to the required software for this process.

Vibrobot Socbot - remote controlled micro robot

2009-06-15T12:15:00.002+07:00

This is one very small and compact wireless robot. The only moving parts are rotors of vibration motors from an old pager or a mobile phone. Now, we all know how our mobile phone dances around on a table while vibrating. Imagine another vibra-motor inside a phone that rotates in the opposite direction. Now imagine first vibra-motor is activated, then the second one. That would make your phone first move left than right, and if both motors are running simultaneously you would get forward motion.

This robot has IR receiver and can be controlled with RC5 remote control. Microcontroller used in this application is PIC microcontroller, actually PICAXE chip.

CharliePlexed RGB LED Dice

2009-06-15T12:13:00.001+07:00

Electronic dice persay is not a very interesting electronic project, but controlling 21 LEDs with just 4 I/O microcontroller pins is really interesting. Multiplexing used in this project is Charlieplexing. We all know that electronic dice requires just 7 LEDs, but since RGB LEDs were used, a total of 21 LEDs had to be controlled.

After a pushbutton is pressed, microcontroller ATtiny13V generates a random number from 1 to 6 and displays the result on RGB LEDs in 6 possible collors and in random fashion.

Arduino Fortune Teller

2009-06-15T12:10:00.002+07:00

This project is actually a version of Magic 8-Ball that we have all seen in the movies. Whether you are seeking advice or just need your fortune told, all you need to do is press a button and a cosmic answer will appear on LCD display.

Common answers are predefined and hard-coded into Atmel microcontroller so microcontroller generates a random number that corresponds to message-index that will be displayed. This project is kind of similar to a more advanced one: Sinister7 by SparkFun.

Laptop PC robot base

2009-06-15T12:09:00.000+07:00

If you wish to build a robot but you are not very familiar with microcontrollers, or your microcontroller just doesn't seem to have enough memory, why wouldn't you simply put your laptop on wheels?

Here you will see a 3-wheeled base for a robot who's brain is your notebook PC. With this configuration you will not end up without FLASH memory and you pretty much don't have any limitations. You can easily access: wifi, web camera, you can write your own image processing software and don't care how big it is, you can access it with your bluetooth phone and so on.

USB CapsLocker prank

2009-06-15T12:08:00.000+07:00

This great little device emulates USB HID keyboard when connected to a PC USB port. It toggles Caps Lock key in random intervals, from 30sec to 8min hence driving the PC user simply crazy. Just imagine plugging in this little device in your coworkers' PC.

It is based on ATtiny45 microcontroller, powered from USB port and it is small enough not to easily notice it!

Sound torture device

2009-06-15T12:04:00.001+07:00

This device has been built for one reason only - to annoy everyone around it. What's interesting is that "everyone" is actually people with less than 25-30 years of age because this device produces a high-pitch sound of around 17 kHz. Ofcorse, it is well known fact that most people above the mentioned age can't hear those high-pitch noises.

It is based on ATtiny25 microcontroller and can be powered by 3V battery (button-cell CR2032). Source code is available for download from the author's web page.

Mousey robot from a mouse

2009-06-15T12:03:00.000+07:00

Here you will se a little light-following robot made in a housing of an old PC mouse. It moves around thanks to the two DC motors which are controlled by LM386 OpAmp and two light sensors. When the robot hits the obstacle it changes direction.

This was on Make in year 2007, but still it's cool for beginners.

Eight channel IR light dimmer

2009-06-15T12:02:00.002+07:00

For some reason, this month was all about IR dimmer circuits, so I found another IR dimmer with 8 output channels realized on ATtiny2313 microcontroller. The way it dimms light is nothing special - it fires up triacs in particular time intervals. What is interesting about this one is actually the author's detailed explanation of the device itself. The IR remote that can be used is any RC5 remote and the only disadvantage of the whole thing is the way it's powered up. It should be powered in parallel with the existing switch in the wall! Source code is also available on author's website.
view more...

Make your own motion sensor

2009-06-15T11:58:00.003+07:00

I remember this thing from the movie The Rock when Nicolas Cage is braking into the Alcatraz. I am talking about the motion/vibration sensor in it's very simple build. I remember making this thing 10 years back in a similar way. My version had a wire hanging from above and at the bottom there was a wire-ring. When it was tilted, the hanging wire made contact with the ring and voila! Anyway, this version is much more sensitive. Aside from this one, there is a tilt sensor that has a metal ball in a tube. It is some kind of mercury-less tilt switch.
view more...

Automatic blinds

2009-06-15T11:52:00.003+07:00

I must addmit that this is the thing I am planing to build for a long time now. It is a device that opens your window shades when alarm clock sounds in the morning. Try sleeping after this buzz. The next step would be to remove manual control of your blinds, but, that's only for the brave ones.

Using LED as light sensor

2009-06-15T11:34:00.001+07:00

Although this project doesn't have any practical use, it is pretty useful since it nicely describes the use of good old LED as a light sensor.

Therefore, LED can be used in two modes; as a photodiode and as LE diode because LE diode is nothing else than specifically doped diode to emit light, packed in transparent case. On the other hand, photodiode is a diode that is capable of converting light into either current or voltage, depending upon the mode of operation. As for this project, it was just necessary to measure voltage on LED and that's it! It is important to note that LED in this mode is sensitive to wavelengths equal to or shorter than the predominant wavelength it emits. The project is realised on Arduino board and source code is available for download.

PATTERN GENERATOR #2

2009-06-12T21:05:00.001+07:00

Pattern Generator is a tool that can measure the pattern (pattern) color which is very useful in producing / improving pesawet recipient device or television video tape recorders, televise a closed circuit system (CCTV / Closed Circuit Television System) computer and video monitor.
Pattern generator measuring tool has a control and indicator as follows:

Power Indocator
Power Switch ON-OFF
Select Switch TTL RGB / LOW / RGB output level
Convergence Switch
Switch RAST
Switch NTSC Bars
Switch OFF COLOR
Switch 4.5 Mhz
Switch IF / RF
Switch CH4/Ch3
Composite VIDEO
LEVEL Control
Composite Video Jack
IF / RF Jack
30 Hz Jack
Jack Composite SYNC
Jack SYNCVs
Jack SYNCHs
Jack B
G Jack
R Jack
RGB Pin D-Type Sub-Miniature Connector

by enrick-tronika

PATTERN GENERATOR #1

2009-06-12T21:04:00.004+07:00

Color television picture generated by the transmitter / light emission layer posfor raised by the layer on the glass because of the impact electron.
Primary colors / color produced basic Red, Green, Blue.
On television, the color pattern can be seen when the station transmitter akan start siarannya.
In the year 1951 NTSC (National Television System Comitee) set the standard color televise in the United States, which was then used many countries worldwide.
Views from the face of the composition is determined by the video signal NTSC specifications.

by enrick-tronika

FUNGSI FUNCTION GENERATOR

2009-06-12T21:04:00.003+07:00

Function Generator is a tool that can measure electrical waves raised in accordance with their needs.
This tool can also generate a certain frequency, with Osscilloscope is a major tool in the maintenance and repair audio-video.
Function Generator can generate the output (output) wave swing.
Function Generator can function as a Frequency Counter, menhitung frequency.

by enrick-tronika

FUNCTION GENERATOR

2009-06-12T21:03:00.001+07:00

Function Generator is a tool that produces electronic measuring, or raised in the sine wave, triangle, ramp, square, and the wave form of credit.
Function Generator generally result in the frequency range 0.5 Hz to 20 Mhz or more.

by enrick-tronika

FUNCTION Insulation Tester

2009-06-12T21:02:00.001+07:00

Insulation Tester is also megaohmeter or megger.
This tool requires 9V voltage of the electricity supplied by the battery 6 UM-3, each of which had the voltage of 1.5 V.
Through the DC to DC Converter 9V voltage will be raised up to 1000V.
Test results can be read at the two flow reading on the scale board
Reading the results on the board ideal scale is infinite.
Series of dots that will be tested often still contain high voltages, although the series is in "OFF".
Flow of 10mili-Ampere tap can stop the human heart.

by enrick-tronika

INSULATION TESTER

2009-06-12T21:01:00.001+07:00

Insulation Tester used to test insulator used in kadel-power cable.
Leakage on the insulator penghantar electric voltage can cause electrical leakage.
Insulation Tester can also be used to test the leakage power on the voltage transformer and motor industry, measure AC voltage, and detention / resistan on the plane televise.

by enrick-tronika

FUNCTION OSSCILLOSCOPE

2009-06-12T20:59:00.003+07:00

Osscilloscope is an instrument measuring electronics which is used to calculate the phase difference of some wave power. This capacity depends on the number of trace (line) on the screen.
Osscilloscope with dual trace (two lines) can calculate the phase difference between the two waves as well as electricity.
Osscilloscope also be used for this purpose:

* Measure the voltage and calculate the frequency
* See the form of waves
* Amplitudo measure the modulation generated by a radio transmitter and the signal generator (Signal Generator)
* Measure the changes in flow (phase) of the input signal
* Measure the frequency that is not known

Steps early in pengoprasian Osscilloscope is as follows:

* ON-OFF button in the OFF position
* Posisikan all the keys that have three positions on the middle position
* INTENSITY play button in the middle position
* Push the button to Pull 5x MAG in order to obtain the normal
* Push the button on the TRIGGERING LEVEL AUTO position.

by enrick-tronika

FUNGSI OSSCILLOSCOPE

2009-06-12T20:59:00.002+07:00

Osscilloscope adalah alat ukur elektronika yang kerap digunakan untuk menghitung perbedaan fasa dari beberapa gelombang listrik. Kemampuan ini tergantung dari banyaknya trace (garis) pada layar monitor.
Osscilloscope dengan dual trace (dua garis) dapat menghitung perbedaan fasa dua buah gelombang listrik sekaligus.
Osscilloscope juga digunakan untuk keperluan :

mengukur tegangan dan menghitung frekuensi
melihat bentuk gelombang
mengukur Amplitudo Modulasi yang dihasilkan oleh pemancar radio dan generator pembangkit sinyal (Signal Generator)
mengukur keadaan perubahan aliran (phase) dari sinyal input
mengukur frekuensi yang tidak diketahui

Langkah-langkah awal dalam pengoprasian Osscilloscope adalah sebagai berikut :

tombol ON-OFF pada posisi OFF
posisikan semua tombol yang memiliki tiga posisi pada posisi tengah
putar tombol INTENSITY pada posisi tengah
Dorong tombol PULL 5x MAG ke dalam untuk memperoleh posisi normal
Dorong tombol TRIGGERING LEVEL pada posisi AUTO.

by enrick-tronika

OSSCILLOSCOPE

2009-06-12T20:58:00.001+07:00

Osscilloscope electronics measuring instrument is used to see the wave form of voltage, the prices in the form of voltage moments and not the sinus sinus.
Osscilloscope can be seen with the form of waves Voltage Electric Voice (audio), the form of a Power Flow Voltage wave form that comes back from the power plant generators, and Voltage Electricity direction comes from the portion of power / battery.
Of phosphor substances that are used Osscilloscope two, namely :

1. Storage Osscilloscope, and
2. Regulator Osscilloscope.

View from the horizontal TIME BASE Osscilloscope it can be divided two :

1. Sweep Range, and
2. Sweep Time.

by enrick-tronika

DESI-BEL

2009-06-12T20:57:00.001+07:00

Desi Bel-logarithm is the value of the comparison between the two sources of power or voltage source.
dB is logaritmik expression of disbanding the unit 2, or a ratio of signal power (Volt, Ampere, Watt).
Volt, Ampere, Ohm agreed as a standard in electrical engineering.
The field of audio engineering that is a standard agreed dBm. Case 'm' refers to the sound power of 1 milli-Watt impedans at 600 ohm.
Measure desi-bell with the same measure Multimeter Voltage Electric pace Cash Back (ACV), because the voice signal voltage is measured pace back.
Measurement desi-Bel need of an amplifier signal Audio / Audio Signal Generator as the source signal. Results on the board pengukurandibaca scale Multimeter. To measure the limit (range) 10 ACV and 50 ACV, measurement results can be read directly on the scale desi-Bel (dB).

by enrick-tronika

Volt-FUNCTION METER

2009-06-12T20:56:00.001+07:00

Voltage power is expressed in units of Volt.
By type voltage electric two, namely :

1. Electricity voltage direct current / Direct Current Voltage (DCV), and
2. Voltage Electricity back Back Flow / alternating Current Voltage (ACV).

Tension on the Back Power Flow pace (ACV), and positive poles negatipnya keep changing, because the cable laying investigators (probes) may be behind the pace.
Voltage and power flow from the retina / PLN network, had a turnover positp polar negatip and 50x in the second one.
In the DCV, the position measuring range switch should be on the DCV, the limit measure (range) at the position a number higher than the voltage will be measured.
ACV in measuring, measuring range switch position must be on the ACV, the limit measure (range) at the position of that which is the number of high voltage that will be measured.
In the DCV, the position of the cable investigator (probes) placed red dots on the positive (+) of the voltage source to be measured, cable investigator (probes) placed on the black dots negatip (-).
In the ACV, the position of the cable investigator (probes) at the point which will be measured in any (random / pace back).

by enrick-tronika

MULTIMETER #2

2009-06-12T20:54:00.001+07:00

Cable investigator (probes) always included a red cable to the hole investigators marked (+) or out.
Cable investigator (probes) black hole is always added to the cable that investigators marked (-) or common.
The battery is connected in series Multimeter hole in the cable investigator (probes).
On Multimeter Analog, read the results of measurement scale on the board.
On Digital Multimeter, results of direct measurements indicated by the number that appears on the display layer.
Results of measurement voltage electricity (ACV-DCV) read on the scale of the board labeled ACV-DCV.
Electric current measurement results (DCmA) read on the scale of the board with DCV, A.
Results of measurement custody / resistan (resistance) to read on the board with the scale-ohm Kohm.
Multimeter criteria determined by the large flow seberaba used for the gauge (meter). The amount of strong currents which can be calculated from Kohm / Volt shown at the left side of the board under the scale.
On Multimeter designed a special, there is a device to measure the transistor, capacitor dioda and capacity.

by enrick-tronika

MULTIMETER #1

2009-06-12T20:53:00.001+07:00

Multimeter is an instrument that can measure in use to measure the amount of electricity, namely:

1.tegangan (V)
2.arus (A)
3.tahanan/resistance (ohm)

Multimeter range switch should be on posisiyang accordance with the amount of electricity that will be in the measure.
The limit measure (range) Multimeter position must be on a larger number of values that will produce electricity in the measure.
Before the measurement of hand must be on board the scale.
Screw the needle position (preset) is used to set the needle position on the zero.
The key position of the needle on the number zero (zero adjustment) is used to put a needle in the zero position before Multimeter is used for measuring the value prisoners / resistans (resistance). For that purpose, the end of the cable from both investigators together, playing the key-turn to get the needle in position zero.

by enrick-tronika

Controling relays over phone line

2009-06-11T22:43:00.002+07:00

It might be "yet another" «device» controller that operates over phone-line, but this one works for sure :)
The task was to build a device that connects to the phone line and has a relay as an output switch. It should also sense if the connected «consumer» is turned-on or off and report to the administrator at the other end of the phone line. The administrator would then call-in the device, log in with the password, and check the state of «consumer», turn it on or off, change password or some other settings.
Current version has only one relay.

Source: Elektronika-ba

Controling relays over phone line v2

2009-06-11T22:42:00.002+07:00

Here is the promised phone-line-controller project with 6 relays!

Source: Elektronika-ba

Interesting transmitter on 420-480 MHz

2009-06-11T22:41:00.002+07:00

I experimented a little with VCO from Nokia phone (R0464), added an RF amplifier and a microphone. The range of this fm bug is up to 1km with full CR2032 battery and good conditions. As the battery discharges, the range s as well as the TX frequency. The bug can be received at a frequency of around 430 MHz and that depends on the battery voltage.

Source: Elektronika-ba

RF modem CC1101 at 868 - 915 MHz, 125mW

2009-06-11T22:39:00.002+07:00

I was experimenting again. This time with Chipcon CC1101 RF modems. They are really good so I decided to give them a little more power at the output. 125mW of RF power to be precise.

The PCB was made at BatchPCB and SMD parts are from: Maxim-IC, Texas Instruments (Chipcon), RFcandy.com, AME Inc, Farnell.com and old Nokia phones.

I am not ready yet to report the range, but it's quite impressive.

Source: Elektronika-ba

PLL induction heater

2009-06-11T22:37:00.002+07:00

If you wish to heat up a peace of metal but without a classic heater - this is the b0mb. Resonant frequency is different for each peace of metal, so the problem is to figure out that precise frequency for the metal that is about to be heated. Here, you can see a driver that finds that exact resonant frequency.

This is a DIY project!

Source: Uzzors2k=>elektronika.ba

Levitating magnet

2009-06-11T22:34:00.003+07:00

Using Hall-effect sensor a very interesting device is built that allows permanent magnet to levitate in air. A microcontroller reads value from Hall-effect sensor and determines how far permanent magnet is from the electromagnet. Than it can decide wether to atract it or let it fall a little in order to have levitation effect.

Source: Mario M.=>elektronika.ba

Build your own RFID tag

2009-06-11T22:28:00.003+07:00

If you don't want to detect a presence of RFID reader or even make your own RFID tag, than you should look away. If by any chance you want to but you don't know what RFID is, it is best for you to read this text. Now when we know the basics, let's move on.

You will need a copper tape, plastic or cardboard base, capacitor and one LED. Ofcorse, for testing purposes you will need RFID reader.

Source: nmarquardt=>elektronika.ba

Render PCBs with Eagle layout editor and POV-ray

2009-06-10T19:23:00.002+07:00

The source link will get you to the whole procedure of generating the POV file and links to the required software for this process.

Dial controlled RGB moodlight

2009-06-10T19:22:00.002+07:00

With this lamp you can set your ambient light color according to your mood. It is based on PIC12F675 microcontroller and it's controlled with a potentiometer and a pushbutton.

Microcontroller reads the potentiometer value with it's A/D converter and sets color change speed (fading efect) or final wanted color, depending on current lamp's mode. Modes are changed with a pushbutton. It sure is a pretty cool mushroom-shaped lamp!

Remote controlled basket ball

2009-06-10T19:21:00.002+07:00

This remote controlled ball is built inside of a plastic hampster ball. Later it was coated with a real basket ball skin with a help of some expanding foam. Inside a hamspter ball there is a propelling motor, servo motors for direction and gyros for stability.

Although it is possible not to use gyros, in the video you can clearly see the difference between gyro and non-gyro version. All electronics are bought from a hobby shop so all effort was focused on building the mechanics. Yep, it is one freaky basket ball.

IR light dimmer v1 published

2009-06-10T19:20:00.002+07:00

This is a very simple IR light dimmer that you will wish to have sooner or later, especially those who are lazy enough to get up and turn off the lights. There are two versions of PCB for two sizes of capacitors: 32.5 x 26.5mm and 28.5 x 27mm.

Features of current beta version of firmware: soft start, soft down, learning IR codes from RC5 and NEC remotes, dimming in 10 levels by using only IR remote, previous dimm-level remembering when operating with remote, sleep timer in duration of 1.6min for 60Hz version and 2min for 50Hz version, ON/OFF control with wall pushbutton.

Wireless pulsating Valentines heart

2009-06-10T19:18:00.002+07:00

If you don't know what to give your loved one for Valentine's, this might interest you. It is a wireless pulsating heart that activates when it's other half gets close. The heart consists of a radio receiver and in the other half you will find a small radio transmitter. Transmitter sends a signal every 0.5s for as long as it is switched on and it is controled with PIC12F683 microcontroller. When receiver senses the transmitter it will blink an LED embedded in heart. Transmitter and receiver are small RF modules that operate on 433.92 MHz whose schematics equivalent can be found here.

So, you give a hart and keep the transmitter for
view more...

Interface rotary phone dial to PIC

2009-06-10T19:17:00.002+07:00

It is very likely that you have an old rotary phone dial lying somewhere around the house for no reason. Well, it is about time to connect it to PIC microcontroller and find some use for it, maybe a digital combination lock with no keypad?

Firmware is written in MBasic and it is available for download. Microcontroller used in this example of interfacing the rotary phone dial is Microchip PIC16F877, but you can use any other microcontroller you like with a few modifications of firmware source code.

LED lightbulb mod

2009-06-10T19:15:00.001+07:00

You must admit that this is pretty unusuall situation - LED in a lightbulb, and it's all powered from mains. Old lightbulb was degutted and replaced with two LEDs in anti-parallel connection, with a capacitor and resistor in series. This resistor with capacitor is used to limit current through LEDs. Two LEDs were filed down to half-size and glued together to form a single LED. This step probably is not necessary but it looks cool this way.

Please bear in mind that this device is powered from mains, so it requires a lot of respect when testing.

Double sided PCB UV LED exposure box

2009-06-10T14:10:00.001+07:00

Here is a very nicely built double sided PCB UV exposure box made out of wood, glass and UV LEDs. Exposure time is about 2-3 minutes, but that depends on photo lacquer thickness and age.

There are two panels with 84 UV LEDs on each, that is 168 UV LEDs in total. One panel draws 700mA from a 12V source. It is recommended that 2000mcd LEDs are used with peak wavelength of 400nm. All diodes are soldered on a veroboard which was probably a great advantage since minimum of 336 holes had to be drilled.

How to make killer PCBs and solder paste stencils

2009-06-10T14:07:00.002+07:00

This is a photo etching procedure but it doesn't involve the use of photo lacquer. It uses dry photo resist films. Films are laminated onto the PCB boards and later exposed to UV light source.

There is also a UV exposing box with vacuum to press the artwork onto the PCB. This results in improved resolution and PCB quality. Vacuum is made with fish tank pump. After developing a basic circuit board, another two films are applied and UV-exposed with soldermask and stopmask layers. What really caught my attention is the process of making solder paste stencils. It is made in the same way as the PCB but the good thing is that the material is a very thin sheet of aluminium taken from a beer can. Excellent idea and a perfect material for this use!

Charge your phone while you walk

2009-06-10T14:05:00.002+07:00

Have no fear of loosing power to your mobile phone anymore - fashion gurus look away now. As funny as it looks, this little thing will harvest energy of your lunch and transform it into electric energy for charging your phone. It is a very simple solution though - hollow out your shoe, left or right and stick in a generator from a generator-flashlight.

There are actually two generators in a shoe with an addition of a spring to push the lever to the starting position. After that, just solder the appropriate charging cable for your phone and off you go! It is capable of generating enough power to charge a phone or iPOD while you walk. Pretty nice thing!

Toner transfer PCBs and copper tinning

2009-06-10T14:03:00.002+07:00

If you don't know how PCBs are made with a toner transfer method, you should check this video out. It is presented here because the process is described in detail, from thorough copper cleaning to etching in ferrum chloride and for the final step - instant tinning of PCB traces for oxidation protection.

Forget about tinning with a soldering iron, this process is carried out very elegantly with a liquid tinning solution. In just a few seconds all PCB traces are protected from oxidation and eager to accept some solder.

Add backlight to LCD

2009-06-10T14:01:00.002+07:00

If you have an LCD display that does not have a backlight, you can easily modify it to add your own. On the bottom side of the LCD glass you can find polarising and reflecting films. This mod process involves pealing off the reflecting film so that LED light can travel through the glass to enlighten the display.

It is very important not to peal off the polarising film and if that should happen, it should be glued back to the LCD glass. LED light source is made out of LEDs and some sort of light-medium. For that purpose, some kind of diffused plastic can be used.

DIY contactless bike dynamo

2009-06-10T13:56:00.000+07:00

It is very important to have lights on your bicycle but it can be very boring to replace those batteries. A classic bike dynamo has a few disadvantages such as slowing down the bike and making excessive noise while rubbing off of a tire. There are contactless dynamos, but why buying one when you can build one yourself?

This bicycle light is made out of three LEDs and a charge capacitor. It is powered by a DIY contactless dynamo made from a relay coil and some hard drive magnets. The circuit is constructed so that one LED is kept steady on while driving and the other two blinking.

Color detection with RGB LED

2009-06-10T13:31:00.001+07:00

For color detection you usually need a color sensor. Here you will see that it is possible to detect a color by using only RGB LED and a photo-resistor.

The idea is that the amount of light reflected from an object is of maximum value when the object is the same color as the light source. That means that with RGB LED and a photo-resistor it is possible to detect a full color spectrum. Microchip PIC16F887 microcontroller is used in this project only because of that. If it is necessary to detect only one color than the microcontroller is not needed, only the circuit with fixed values. This is a very good explanation of a simple color sensor and it could be used in robotic sorting.

Quick and funny solderless robots

2009-06-10T13:30:00.002+07:00

Here is another version of bristle-bot but this time without heating up the soldering iron. With just two batteries, DC motor, few pieces of wire and brush head you can make a little robot that chaotically moves around.

This is not a very serious device and it has no specific purpose. Anyway, it would be very funny to watch few dozen of these crazy devices moving around and hitting each other in a condemned space.

Motion activated Super Mario thingy

2009-06-10T13:28:00.002+07:00

We all remember good old Mario Bros game. Well, some of us still play it! John obviously can't get enough of it so he made a desk adornment in Mario Brothers mushroom candy tin in which he placed microcontroller, two LEDs, motion detector and a speaker.

After detecting the motion, mushroom device activates and starts playing Mario Bros game theme with LED blinking effect. Micocontroller used in this application is Attiny13A, motion detector is PIR sensor and it is all powered from USB port. What's interesting here is audio theme reproduction from microcontroller and that part is nicely described. Source code is available for download on project page.

Current status of my mobile robot platform v1

2009-06-10T13:26:00.002+07:00

I always had this idea of making my own GPS guided RC car. The hardware should not be very complicated but the software could get pretty messy.

After some planning I came up with the hardware design (my robotic platform) that has integrated: Atmega328P brain, HM55B digital compass, PING))) ultrasonic range finder, two MC33886 H-bridge controllers, voltage converters for all electronics on board, GPS receiver chip Venus634FLPx, some buttons and LEDs.

Sea water battery

2009-06-10T13:23:00.002+07:00

With only a few parts you can make a working battery with salt water as it's main ingredient.

This battery can produce 2-5mA at around 1V. Cathode and anode are made out of aluminium foil and graphite taken out from a pencil or old 1.5V battery. Electrolyte, which is actually a paper tissue soaked with salt water, is wound around a graphite rod which represent the anode. The other electrode is cathode and is made out of thin aluminium sheet. It all fits snugly in a film canister with two electrodes wires sticking out. This battery can well be used to power Joule Thief LED circuit.

A swing set that generates electricity

2009-06-10T13:19:00.002+07:00

Well, you must agree with me that this swing set is no child's play. We have all seen the power generating shoes but this could be even more practical.

This project requires some serious mechanical assembling and a lot of parts but it can be built with good efficiency. Currently, as the author states, it produces only 5Volts but with some design changes it could easily produce a lot more. The generator used in this application is also a DIY version from Hugh Piggott's web site but a car's alternator can be used instead.

Solar powered audio amplifier

2009-06-10T13:15:00.002+07:00

For these summer days out on the beach or even on a barbecue, you sure need good music. For music you usually need some power and power source is not easy to find on a beach. Either way, the Sun is up there so why not harvest some of it's massive energy to power a small audio amplifier and even mp3 player.

This project incorporates solar panels with DIY audio amplifier based on LM386 chip. The interesting part is that this device doesn't require any batteries, not even rechargeable ones. Instead it accumulates power into electrolytic capacitors for use, especially with those basses.

CC1101 RF modem + 250mW amplifier published

2009-04-13T11:11:00.002+07:00

Here is my home-built, cloth iron soldered, range extender for CC1101 (included onboard) RF transceiver chip from Texas Instruments. You could say that it is a CC1101+CC2591, but for 868/920MHz band. I used MAX2233 RF amplifier from Maxim-IC. It can deliver up to +24dBm (250mW) of RF amplification with +10dBm of input.

After adding RF amplifier, original power of 10mW is boosted to almost 250mW or 1/4W. MAX2233 RF amp can deliver up to 250mW when powered by 3.6V, and since I used 3.3V LDO on my board, the output RF power is little less than that.

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Sundial LED clock

2009-04-13T11:09:00.001+07:00

Here is a very interesting concept of indoors sundial clock. A sundial is a device that measures time by the position of the Sun. Since indoors we don't get the Sun to cast a proper shadow for these purposes, it can be replaced with, yes, good old LEDs.

This shadow clock can show all three "hands"; hours just like a real sundial clock, minutes and seconds. Each shadow, or hand, is cast from a different light source - a ring, and each ring is of a different color (RGB). So, there are three rings, each having 12 LEDs (36 LEDs in total) and it is all multiplexed and controlled with AVR microcontroller.

There will probably be a kit of this cool clock soon, so check it out!

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DIY LED chandelier

2009-04-06T11:21:00.002+07:00

This must be the best use for some 160 white LED diodes that you have laying around. The whole chandelier is powered from mains, actually from a 12V transformer. Vertical support is made out of bicycle wheel spokes and they are also used as power lines for LEDs.

I must say, it looks very impressive!

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Printing your PCB directly with InkJet printer

2009-04-06T11:19:00.002+07:00

You have probably already seen this, but for those who didn't here is another method of making PCBs that gives the same results as photo-etching technique!

All that you will need is an old InkJet printer that needs to be modified to support printing directly on the copper-clad boards instead of paper. After the printer prints your design on the board, the key step is to cure the ink on 230 degrees Celsius in order to turn it into a strong acid resist. That is the key for successful PCB with this method.

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