Tuesday, November 20, 2018

555 LED Blinker

It is possible to write a whole book on 555 Timer IC and people have done it too. Here is a very simple thing that can be done with this chip, a very simple two LED blinker.



From the circuit it is very simple to get the idea which parts to be used.

R1, R2 and C2 determines the speed of blinking.

Can be easily powered by a single 9V PP3 battery.

555 is a very common and versatile chip so learning about it can help hobbyist a lot.

Omitting one LED and the corresponding resistor will simply make it a single LED blinker.