[hecanjog]

This shouldn't be downvoted. Transducers being reversible is a neat and non-obvious thing.

[saagarjha]

It's probably downvoted because it sounds somewhat nonorganic.

[3form]

Even with the em-dash. New account and other comments seem to be here-and-there. Maybe LLM with some editing after.

[dnnddidiej]

Motors can be dynamos too

[maqp]

and many LEDs are weak photo-diodes, i.e. you get weak current when you shine a light to them.

[mkl]

It'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.

I think they're being downvoted because their comments all seem to have AI features.