das Signal würde ich direkt auf das Leuchmittel geben.
Das wollte ich auch.
Den ADC-Wert zum PWM, der dann die Leuchtdiode ansteuert.

Dazu Suche ich eine Zeit-Routine um 32*80*12,5 Punkte zu realisieren.
Vom ADC zum PWM zur Leuchtdiode.

So wird das Bild Zeitlich beschrieben:
About the Pictures
The pictures were generated as Windows Bitmaps, then converted to WAV files on a PC using "Cool Edit 96" by Syntrillium Software.

* Each bitmap was made to the NBTVA 32 line standard (Narrow Band TeleVision Association).
* The sync pulse height is 30 percent, 77/255, or 4D(Hex).
* The sync pulse duration chosen was 6/80 line period, 187.5 microseconds.
* The bitmap format chosen was width 80 x height 32, 8 bit monochrome.
* This results in a 32 line scan, with 2560 samples, bytes or pixels per frame.

This was converted to a WAV file at a sampling rate of 32000 samples per second:

* It produces 32000/2560 = 12.5 frames per second, and
* A frequency spectrum with a bandwidth of 16 kHz.


Hier die Nipkow-Variante:
http://www.sptv.demon.co.uk/nbtv/