A Simple-as-Possible 8-Bit Breadboard Computer (theokelo.co.ke)

I also build a SAP variant inspired by the Ben Eater series on YouTube. You can check it out here: https://github.com/dangrie158/SAP-1 Interestingly my docs are very similar to the linked article: https://dangrie158.github.io/SAP-1/

I think building such a low-level computer made me appreciate and understand current technology much more