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phototransistor [2006/10/15 09:35]
phototransistor [2006/10/15 09:35] (current)
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|+||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.|