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 ...

Although they’ve been on the shelves of many online retailers for quite a few years now, Geiger-Tubes have been conspicuously absent from hobby electronics magazines/websites. It has to be said that ...

Based on CD4017 and logic gates this electronic circuit switches on a relay if you press four keys in the correct sequence, and backs to the start condition by pressing any key. Once the circuit is ...