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.


%d bloggers like this:
Read more:
Starter Kit for Electronics

To get started you must have your own stuff, it will cost a little but that's the only way to...

Top 10 Things to do in Istanbul

During my Masters in Istanbul for a year I explored the city quite a lot with my camera and here...

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...