Build an 8-bit Computer

Ben Eater's sprawling build guide exposes a computer at the scale of gates, registers, counters, memory, and a forest of carefully placed wires. You can browse the videos and schematics as a deep visual lesson, or take the expensive and occasionally stubborn route of assembling the machine yourself.

What is Build an 8-bit Computer?

The course starts below the level where most computer explanations begin. A clock module establishes the machine's pulse, then registers, an arithmetic logic unit, RAM, a program counter, output hardware, a shared bus, and control logic gradually turn parts into a programmable computer. The index keeps this formidable build navigable, with overview demonstrations, prerequisite refreshers, parts, schematics, and module-by-module videos gathered in one place. Its charm is not efficiency; it is watching abstractions acquire LEDs and an alarming quantity of wire.

What you can do there

• Watch a staged breadboard-computer course
• Read parts lists and schematics
• Build and troubleshoot computer modules

Why we picked it

Few web tutorials make processor architecture feel this tangible. The staged modules let a curious reader stop at an overview or follow the signal all the way through the machine, while independent builders confirm both the educational payoff and the real troubleshooting that comes with physical hardware.

How to get the most from it

Begin with the overview and programming demonstrations, then use the transistor and logic-gate refreshers if the vocabulary feels slippery. Follow the module order instead of cherry-picking videos, keep the matching schematic nearby, and test each section before adding the next. If you plan to build, read the parts and support pages before buying anything.

Good to know

Watching and reading are the low-friction route; constructing the full machine is a large, patient project. The current parts page estimates roughly $250–$300 before shipping when sourcing components separately and discloses affiliate retailer links. Parts and kit contents can vary, so budget room for substitutions, troubleshooting, and a work surface that may slowly surrender to breadboards.

Who made it, and when?

Ben Eater is the credited creator or organization.