Well, he probably surprised himself in doing it. It sounds like a pretty scary thing to try, but once you get going and focus on getting one step done at a time you’ll be amazed at what you can do.
And that’s what this guy did. A guy named Jack Eisenmann, who just graduated from high school, built himself an 8-bit computer out of an old TV and keyboard, and some chips he probably bought from an electronics store. Oh, and tons of wire, as you can see in the video:
Complete with classy retro music. The system has 64K of memory and
prints a 240×208 black-and-white screen.
From the creator:
The DUO Adept is an 8-bit homebrew TTL CPU + GPU I have designed and built. As a challenge I used only basic kinds of logic chips; no microcontroller or video card. It has a black and white TV monitor and keyboard, and is generally awesome!
Oh, and I forgot to mention: I made this when I was a highschooler with no formal education in electronics. :)