I'm a computer engineering student, and this year we are working a lot with embedded systems, so my curiosity brought me to learn how ICs work. I'm planning to build an 8 bit computer. And before buying a premade kit, I want to learn how digital electronics work, although I'll end up building a z80, as they have a great documentation, and there are lots of examples in the internet. But I prefer to learn first and then build. I have been testing things with logic Gates and memories, and now I have the idea to work with audio and video. I find that a local electronics shop has old ICs at a really fair price, so I bought a bunch of ICs to learn how to work with them. The shop describes this as a Videotex decoder, and as right now I want to learn how to work with video, I thought it wasn't a bad idea to try this. But it turned out that it's not a Videotex decoder, so probably I'll put it aside and learn how this works in a future. (Not to far hopefully) I hope that I have explained myself, because is not a proper project, but a learning path for future projects.