CRT Deflection coils to composite video?

[ALearningLad]

Just had a shower though of can you use a micro controller like a Arduino or raspberry pi to take the signal to the deflection coils. Then translate it into a composite/VGA/whatever video signal. Couldn't see anything like that online. Can someone also explain why you could or could not, thank you!
I will not do anything with this but just want the answer. Not screwing with crts as a novice.

[CaptDon]

Answer.....NO! There is no information contained in the deflection sweep voltages. Only the scanning sawtooth waveform.

[ALearningLad]

Ah thanks for the response, haha feel like a dummy now. Does make perfect sense however.

[NiHaoMike]

Answer.....NO! There is no information contained in the deflection sweep voltages. Only the scanning sawtooth waveform.

Except for vector displays, those use specific waveforms that trace out the desired shape. In the days when those were in common use, the main advantages were better resolution and very high dynamic range.

[PKTKS]

Just had a shower though of can you use a micro controller like a Arduino or raspberry pi to take the signal to the deflection coils. Then translate it into a composite/VGA/whatever video signal. Couldn't see anything like that online. Can someone also explain why you could or could not, thank you!
I will not do anything with this but just want the answer. Not screwing with crts as a novice.

Why bother if the 80/90s decades of VLSI already provided us with
a TON of good  chips to do so reliable?

Some attached here and can be easily found even today..

Paul

[PKTKS]

ALAS...

If you are wondering for something more modern than
simple CRT deflections.. e.g.  resolutions  like multisync monitors..

Try this one still found ... today

Paul

[Terry Bites]

I'm about to take a shower myself...

[PKTKS]

hmm almost left aside... if you are going to drive the yoke..

A handy small standalone tip...

Paul

[james_s]

It's actually the current through the coils, not the voltage across them that determines the beam position.

Either way you would be much better off just taking the H and V sync signals, and then of course no matter what you do you need to sample the intensity signal to the electron gun to get your video image. If you only looked at deflection current you'd just get a blank raster.