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submitted 2 days ago by ekZepp@lemmy.world to c/programmer_humor@programming.dev

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[-] cmnybo@discuss.tchncs.de 15 points 2 days ago

They didn't even use an ADC. They used 555 timers to produce a pulse. They measured the length of the pulse to determine the potentiometer position. Since there are 4 analog inputs, they typically used the 558 timer which is the quad version of the 555.

[-] BigDanishGuy@sh.itjust.works 6 points 2 days ago* (last edited 1 day ago)

And here I thought I had it all figured out. But it does make sense. Doing it with an analog signal introduces noise and measuring pulse widths is going to be simpler.