/diy/ - Do It Yourself

>>1992171
This is the NTSC to PAL converter chip I was talking about:
https://www.digikey.ca/en/products/detail/analog-devices-inc/AD725ARZ/699489

> That sort of pattern looks to be created frame-by-frame
It was created by pointing a camera at a TV with a video synth adding patterns in between.

> Also have you dabbled in any vector images?
Yes. Any random sine waves into a vectorscope makes a pretty spirograph pattern so I got bored of it quickly. Color raster video is a lot more technically challenging. I did build this entirely analog vector to raster converter. It's low res but a working proof of concept.

>>1835385
If + is greater than - the output is '1'; otherwise its zero. Both inputs can be fluctuating waveforms, there's no need for one to be a stable "reference". There isn't really an A==B since variations between analog signals can be so small. To detect that you need to use two comparators to construct a "window comparator". It goes high if one input is close to another.

The outputs of comparators are usually open drain meaning you need a pullup resistor.

Comparators are a subset of op-amps. It's assumed everyone looking at a datasheet knows how to use those.


Here's an analog vector to raster converter I built by running a huge number of 2D window comparators in parallel. Each point is produced by comparing two voltages representing x,y to the vector input.

>>1675959