Cambridge-1 is a 4-bit homebrew 7400-based CPU | Arduino Blog
4 bit relay computer – AntiMath
Subsystems - Microprocessor Trainer - Subsystems
4-Bit Breadboard CPU - YouTube
Nibbler 4 Bit CPU | Big Mess o' Wires
7400 competition entry: Fourbit, 4-bit homebrew CPU – Dangerous Prototypes
RL4000: 4-Bit CPU trainer — Parallax Forums
4-Bit TTL Scratchbuilt Computer | TTL CPU
4 bit computer built from discrete transistors | Hackaday.io
B4 Tutorials 8-10: We are building a 4-bit computer. - YouTube
Building a 4-Bit Computer from the Ground Up - EEWeb
TTL based 4-bit CPU | Hackaday.io
Building a 4-Bit Computer from the Ground Up - EEWeb
Learn More About The Design Of PCs Using The 4-bit Microprocessor Computer (video) - Geeky Gadgets
Building the Cambridge-1: A 4-bit homebrew 7400 based CPU
computer architecture - How can I get 8 bits output from 4 bit CPU? - Computer Science Stack Exchange
Homebrew 4-bit processor | Ubergizmo
7400 Series IC Nibbler 4-Bit CPU – PCB Version! « Adafruit Industries – Makers, hackers, artists, designers and engineers!
Building a 4-Bit Computer: Mitigating Metastability (Part 4) - EEWeb
Reincarnated Return of the HRRG 4-Bit Computer (Part 1) | designnews.com
Intel 4004 CPU 4 bit Central Processing Unit CPU Computer Chip Integrated Circuit Mask, Abstract 5 Digital Art by Kathy Anselmo - Fine Art America
The Simple 4-Bit Computer | GilDev
4-Bit Computer – Waiting for Friday
