Showing posts with label Electronics Projects. Show all posts
Showing posts with label Electronics Projects. Show all posts

Monday, January 16, 2012

Electronics :Traffic light Circuit


This is a two way continuous traffic light circuit which uses  LED, diodes and IC's . 
Usually most traffic light in the world is PLC controlled but this circuit is  simple  and easy to build . 

 In the image below is the schematic diagram of the project . I used Yenka Free Software to simulate and see if its properly working . You can download it free on Yenka website.

two way 555 traffic light circuit

The  clock pulses from the 555 astable circuit is sent into the 4017 decade counter . Each output becomes high in turn as the clock pulses are received. Appropriate outputs are combined with diodes to supply the amber and green LEDs. 
simple 2-waytraffic light circuit
components :
  • resistors: ,50k ohm, 10k ohm, two-100k ohm
  • capacitors: 10µF 16V radial
  • diodes:  16 pieces of 1N4148 
  • LEDs: 2 sets of ( red, amber or yellow, green)
  • IC:555 timer ,  4017 counter
  •  on/off switch
You can adjust the timing of light-shifting by adjusting the  value of the resistor in the astable circuit .