Transducer
device that converts a signal in one form to another form
phototransistor
optoelectronic device
soundbox
instrument transformer
Hall effect sensor
variable reluctance sensor
photodiode
Amateur radio repeater
potentiometer
erase head
measuring transducer
finite state transducer
speaker driver
laser diode
actuator
Interdigital transducer
optical module
Fessenden oscillator
racon
pickup
solar cell
magnetic head
trigger
Exciter