The LM555 timer (IC1) is configured as a monostable multivibrator that generates a pulse. This monostable output serves as the clock input for CD4033 (IC2). IC2 increments on every positive clock edge ...

This one comes to us by way of [Astronomermike], who chose to make a digital circuit with nothing but 555s and a largish handful of passives as his entry in the current 555 Timer Contest.

It’s back! The 555 timer contest wants to see you do something cool with the 555 timer chip. At stake is the adulation of electronics geeks everywhere. Three top winners will be awarded a $150 ...