Easier Approach to Electronic Projects

LED Chaser

This is a sequential circuit design, it has 10 LEDs

The count advances as the clock input from 555 timer becomes high (on the rising-edge). Each output Q0-Q9 goes high in turn as counting advances.

The reset input should be low (0V) for normal operation (counting 0-9).

If you just want to use few LEDs just to have a look at function, counting to less than 9 is achieved by connecting the relevant output (Q0-Q9) to reset, for example to count 0,1,2,3 connect Q4 to reset.


Parts Required:

  1. 33k, 47k & 1k.
  2. 0.1mF
  3. 2.2mF
  4. 555 Timer IC
  5. 4017 Counter IC
  6. Led x(10)
  7. 9v Battery

Circuit Diagram:






Bread board Arrangement:







IC Pin Configuration:







Did it work? If it did, you can thank me back by donating whatsoever amount possible. My website is a personal initiative for education and development, and to provide a user-friendly experience I do not allow any sort of monetizing adds on my website. Your even a very small donation is very precious for the future development of Rookie Electronics. Thank you!

Click this donate button which will take you to safe PayPal window where you can donate Rookie Electronics.


Read more:
Controlling DC Motor using Arduino

This is actually controlling speed of DC motor with potentiometer using  Arduino, where DC motor is supplied by PWM output...

What is Aurdino?

Arduino is the most famous micro-controller among hobbyists and students around the world. Most importantly it is an open source physical...


Below is the Tree map of all Projects(Pages) and Posts on my site. http://www.eeweb.com/ EEWeb.com is an Electrical Engineering News,Resources and...