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> Fun fact: semiconductor effects are often reversible! A light emitting diode is an inefficient photovoltaic panel, and vice versa Another fun example: Manual
by diggan 1y ago
> Fun fact: semiconductor effects are often reversible! A light emitting diode is an inefficient photovoltaic panel, and vice versa
Another fun example: Manually rotating a DC motor produces current! Might make sense if you start out with generators I suppose, but as someone who used a DC motor "the other way" first, it was kind of counter-intuitive.
- ryoshu 1y agoA speaker is an inefficient microphone and vice-versa.
- oskarkk 1y agoI once connected a microphone to the audio output by mistake. You can imagine how confused I was when the microphone started playing music.
- itishappy 1y agoExamples off the top of my head include: * Electromagnetism (motors/generators) * Photoelectricity (LEDs/PVs) * Thermoelectricity (TEGs/Peltier coolers) * Piezoelectricity (crystal oscillators) Anybody got others?
- RetroTechie 1y ago> Piezoelectricity Ceramic capacitors can have similar issues: apply voltage, part warps a tiny bit. @ the right frequencies some (mechanical) resonance effects might come into play. Yay! But I have a hard time imagining this to be a real-world problem. Edit: "microphony" or "microphonics" https://en.wikipedia.org/wiki/Microphonics https://en.wikipedia.org/wiki/Microphonics Just an idea: coil whine might be reversible too. Vibrate coil, get some (noise in) inductor current. Oh yeah: don't yell too loud at your (spinning) harddrives.