It's probably downvoted because it sounds somewhat nonorganic.
replyEven with the em-dash. New account and other comments seem to be here-and-there. Maybe LLM with some editing after.
replyMotors can be dynamos too
replyand many LEDs are weak photo-diodes, i.e. you get weak current when you shine a light to them.
replyIt's pretty obvious if you did high school physics. I experimented with earphones as microphones as a teenager but couldn't get any meaningful audio data.
replyI think they're being downvoted because their comments all seem to have AI features.