Demonstration
This project is a UK traffic light system. Which operates for 1-7 minutes by adjusting 1M potentiometer.
555 timer behaves as a clock pulse generator which is input to binary counter having outputs Q0 – Q9.
Appropriate outputs are combined with diodes to on/off the particular LEDs.
Parts Required
- 330R, 22k, 100k
- 1M Potentiometer
- 0.1μF, 10μF, 2.2mF
- 1N4148 x (6)
- Red, Yellow and green LEDs
- 555 timer IC
- 4017 counter IC
- 9V Battery
Circut Diagram
Bread Board Arrangement:













