Some homebrew CPU from early 70s, from Japan - Hardware - Retro Computing
Build an 8 bit CPU from TTL Logic ICs - Hackster.io
4 Bit TTL CPU - jpralves.net
The Gigatron – a TTL microcomputer without a microprocessor #VintageComputing #8bit « Adafruit Industries – Makers, hackers, artists, designers and engineers!