Easier Approach to Electronic Projects

Traffic Lights using 4017 & 555 Timer


 

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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