David Butleradded April 27, 2018

This was easily the most complicated kit i have put together up to this point. This is a fully-working replica of the DEC PDP-8/I, a computer from 1968.
It is all controlled by a Raspberry Pi Zero stuffed inside the case. It can be programmed via the 26 switches on the front. The original machine used paper tape machines, but that is replaced with the USB ports. You can also use these ports with a pair of USB-to-TTL cables in a null modem configuration to use a modern computer like an old terminal. You can also use a USB to RS232 cable to use an actual old terminal.
Kits are sold by Oscar Vermullen. Cost me about $200USD in the end, but it is worth every penny.