Update: here's a follow-up video with a 555 timer driving the clock: <a href="https://www.youtube.com/watch?v=kSRZ2_V9SgM" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=kSRZ2_V9SgM</a><br />A laughably simple 8-bit computer I've constructed on a breadboard just for fun. I think it demonstrates the operation of the microprocessor very nicely, so I decided to upload a video explaining how it works.<br />It's based on the Zilog Z80 8-bit processor, which is connected to a ROM chip, and a crude output device made out of a latch and 8 LEDs.<br /><br />Project page with schematics, code and pictures: <a href="http://nuclear.mutantstargoat.com/hw/z80micro/" target="_blank" rel="nofollow">http://nuclear.mutantstargoat.com/hw/z80micro/</a><br />...<br /><a href="https://www.youtube.com/watch?v=CS44XJt_gYc" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=CS44XJt_gYc</a>