Everything for Electronics


A Unique LED Clock

Just when you thought there were no more cool electronic clocks to build, this Arduino-controlled version showed up.

Steampunk Planetarium Clock

This unique timekeeper will have you seeing stars ... even the same skies the Spanish missionaries observed back in the 1600s!

Transistor Clock

The clock is made of a collection of counters. Counters made by a chain of n flip-flops result in binary ripple counters capable of dividing by 2n. A four flip-flop counter naturally counts from 0 to 15. To make it count from 0 to 9, it needs some steering logic on the flip-flop toggle inputs.