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