This is an oldie, but oh, man is this ever good. It’s a Nixie clock made without a microcontroller. In fact, there aren’t any logic chips in this circuit, either. As far as we can tell, the logic in ...

Utilized basic digital logic gates, lasers, and optical diodes in designing and building a logic circuit to accurately keep track of the number of people entering and exiting a room. Worked in a group ...