/diy/ - Do It Yourself

>>1992352
I've been using TL974s. They're really cheap for how fast they are. However they have this oddity where the output is rail-to-rail, but the inputs can't be within 0.7v of the rails. When using audio OP-amps like LM324s you'll see big distortions on even simple things like a ramp wave across a scanline. Trying to handle the 3.57MHz chroma subcarrier is completely impossible.

>>1992355
This is the best website I know of for explaining how analog composite video signals work.

https://www.maximintegrated.com/en/design/technical-documents/tutorials/7/734.html

I started out doing microcontroller projects with pixely video outputs. There are many example projects like that online. Once I understood how the signals worked I started figuring out how to make patterns with analog circuits instead of code. There isn't a book or tutorial for that. Once you know what analog circuits do on a scope and understand how that translates to a TV screen you can do some interesting stuff.

>>1652747
This is what you get when you combine them. The tiling effect comes from how the folder chops the space into a bunch of smaller rectangles.

>>1637298
> What does that thing do?
This. It's basically an analog computer that generates video patterns. They were used in a lot of early science fiction before effects could be done in software. I don't think there's any need to patent it given that it's such a niche product that has no application outside education and art. Filing a patent costs about $10k I think.

>>1637164
Business to customer seems like the best approach. The main thing I'm struggling with is how to advertise and get customers.

>>1369369