I did this once with a diode when I was a baby electrical engineer in college. But of course you need some kind of measurement circuit. So somehow(???) I figured out I could wire a diode into one axis of my analog Gravis joystick--hooked up to my soundcard--and get a fairly accurate and stable measurement of temperature by poking the monostable multivibrator (pretty sure that's what it was called) in the soundcard that would trigger the time it took to drain a set amount of charge through the joystick's x-axis/now-diode.

Novices who don't have a clue nor know any better come up with the weirdest solutions. I have no clue whatsoever now what inspired me to even try something like that.

And you managed to reinvent the single-slope ADC :-)

https://www.cedarlakeinstruments.com/archives/841

https://www.monolithicpower.com/en/learning/mpscholar/analog...

> I have no clue whatsoever now what inspired me to even try something like that.

A combination of "what's the simplest thing that could possibly work?" and "well they didn't say you couldn't..."