Traffic Lights using 4017 & 555 Timer

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 Circut DiagramBread Board Arrangement:

1 minute

Read Time

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

  1. 330R, 22k, 100k
  2. 1M Potentiometer
  3. 0.1μF, 10μF, 2.2mF
  4. 1N4148 x (6)
  5. Red, Yellow and green LEDs
  6. 555 timer IC
  7. 4017 counter IC
  8. 9V Battery

Circut Diagram
Bread Board Arrangement:

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