Transducer
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A transducer is a device that usefully converts energy from one form to another. Usually a transducer converts a signal in one form of energy to a signal in another. Transducers are often employed at
Mechanical transducer
Light-emitting diode
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A light-emitting diode is an electronic component that uses a semiconductor to emit light when current flows through it. Electrons in the semiconductor recombine with electron holes, thereby releasing
Transducer
…Incandescent lamps – convert electrical power into incoherent light Light-emitting diodes – convert electrical power into incoherent light Laser diodes – convert electrical power into coherent light…
Blue, green, and red LEDs in 5 mm diffused cases. There are many different variants of LEDs.
A bulb-shaped retrofit LED lamp with aluminum heat sink, a light diffusing dome and E27 screw base, using a built-in power supply working on mains voltage
Blue LEDs
An RGB LED projecting red, green, and blue onto a surface