phototransistor
This type of transistor has only two pins, the collector and the emittor. Because they have no base pin, they can sometimes be mistaken for a normal diode or an LED. The amount of light falling on them acts instead of the base current and once a certain level is reached, the transistor is switched on.
phototransistor.txt · Last modified: 2006/10/15 09:35 by 127.0.0.1