|
|
|
|
|
|
by rcxdude
890 days ago
|
|
|
This concept is quite general: most sensors and actuators are transducers: i.e. they work in both directions as a sensor and an actuator. It varies from one to the other how well something designed for one role can work as another, but in the care of speakers they are actually reasonably good microphones. Another fun example: solar panels are LEDs and LEDs are solar panels. You can detect light with an LED (and in theory power something from it, but you'd need a lot of light and not need much power) and you can emit light with a solar panel. Most solar panels will only emit light in the infrared, though. I have seen a triple-junction solar panel being back-driven by others in parallel with it, and it glowed a deep red, which is pretty cool. |
|
|