Miscellaneous Home Built Computers
This topic contains a number of home-built computers. Most of them were found on YouTube and other sources.
In addition to this topic, there are a few other topics that cover particularly noteworthy home-built computers at these links:
Ben Eater's home built computer
Ben Eater's home built 6502 computer
Lev's Transistors to Tetris
Steve Rayner's home built Z80 computer