this post was submitted on 31 Mar 2025
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Virgin Physicists (lemmy.world)
submitted 5 days ago by [email protected] to c/[email protected]
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cross-posted from: https://lemmy.world/post/27589038

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[–] [email protected] 28 points 5 days ago* (last edited 5 days ago) (4 children)

I used to make shunt resistors out of a pencil and a piece of paper. Rub pencil all over paper, cut strips to size of required resistance.

EDIT: I mean megaohm resistors not shunt resistors. 20MOhm for DIY theramin.

[–] [email protected] 10 points 5 days ago

I admire it but also...wtf lol

[–] [email protected] 3 points 4 days ago

That's cool, could you share some photos? The theramin I mean

[–] [email protected] 4 points 5 days ago (1 children)

I made a potentiometer with paper and graphite clay once

[–] [email protected] 1 points 13 hours ago

Confuses me that anybody would downvote you for this. I've made makeshift capacitors out of rolled aluminum foil. It's dumb, but it worked for what I wanted (triggering a trackpad via stepper motors for testing microcontroller code.) Plus I just wanted to see if it even worked. Life = science experiments.

[–] [email protected] 2 points 5 days ago

This is exactly how high precision resistors are calibrated. A laser is usually used to notch out bits of the resistor to tune it after it's made.