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:
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
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