Mx Rey (Fuck ICE) 💜 🏳️⚧️"So, solar panels and LEDs are basically the same--"
"what??"
"They're like speakers and microphones--"
"WHAT!!"
"what??"
"They're like speakers and microphones--"
"WHAT!!"
Spottyfox斑狐狸@rey Wait, what?!
@spottyfox which part
@rey The solar panel - LED part, had no idea
@spottyfox so they're basically the same: semiconductor junctions that deal with photons. if you apply enough light to a LED, it'll produce a voltage. if you apply enough voltage to a solar panel, it'll emit light. neither do a good job of doing the wrong thing, but they do
Zelda 
Antwan van Houdt
DianeSteven Mould has a video showing LEDs generating voltage from light and solar panels glowing from voltage. (with an asterisk, since they glow in infrared)
Why all solar panels are secretly LEDs (and all LEDs are secretly solar panels)
pixx@alienghic @zelda @rey @spottyfox
I'd argue that's not even necessarily 'bad LED', just 'bad for normal human LED usage'. I'm sure you could find a good use for it :3
Atomic FoxEhrm, since forever? It's just that the typical LED junction is very small, so it makes a bad photodetector. In fact any old glass-envelope diode can be used as a photosensor, but they're typically most sensitive in the infrared.
Also, as a rule, light-sensing diodes are reverse-biased, and a lot of LEDs have a very low threshold for breakdown under reverse voltage. I can recall killing a red one when I was a kid by applying 3V from two AAs backward across it, being careless with the little Radio Shack 101 Circuits Lab.
Wilfried KlaebeThere's devices that use one IR LED on the device and another one on the communication adapter, pointed at each other, to do two-way communication.
joe@zelda @rey @spottyfox
Shapolab has a demonstration
https://misskey.io/notes/a8qj96g25z6f0ac7
btw Albert Einstein got his Nobel price for his work on this photoelectric effect : D
Shapolab has a demonstration
https://misskey.io/notes/a8qj96g25z6f0ac7
btw Albert Einstein got his Nobel price for his work on this photoelectric effect : D
@Joe_von_Saporski @rey @spottyfox that's a very cool proof of concept/demo! thanks :OO
i knew about the microphone/speaker part, it just seemed crazy to me that it would work with LEDs as well heh
@zelda @rey @spottyfox
There was a hardware bug in the Raspberry 3 I think. Everytime someone took a photo with flash lights the rpi crashed. Turned out, one package wasn't so light sealed as thought : D
btw @shapoco also built a bigger reflector and used high power LEDs
1000millimeter@Joe_von_Saporski @zelda @rey @spottyfox @shapoco It was the package of a voltage regulator. However I thought it was an earlier raspberry but may have been 3.