The Gigatron, a computer that runs on 37 7400 series IC's for all its needs. This computer was designed by Van Kerinick and Belgers, and the set up can be found at :https://gigatron.io/?page_id=17

This is basically an 8-bit computer working with TTL logic chips. great fun to build and learn how logic gates work. A TTL computer is a computer where the components of the Central Processing Unit (CPU) are made out of individual TTL chips, instead of all of them being integrated onto a single microprocessor chip. After the invention of the IC, but before the invention of the microprocessor chip, minicomputers where typically made from these chips. Also many of the earliest arcade games where made out of TTL chips, often more than one hundred of them. The combination of a low chip count with the ability to display video and play interesting, fast scrolling, video games. Other small TTL designs have limited output capability. For example, they can only drive some LEDs, or an LCD display. Designs with video typically need multiple boards. We blended the video circuit with the processor. One way to see it is as a processor that is powerful enough to synthesise video signals. You can also see it as a video card that can run general purpose software. Most importantly, you can get it as an affordable kit that you can put together yourself and can show off to others. Even if you don’t have a lot of soldering and electronics experience, you can build one yourself. And once you’re bored with the games, it can still function as an interesting looking clock while it is drawing its Mandelbrot fractals.