Darlington Type Phototransistor Optical Triggered Switch Application Circuit

Published:2011/7/3 6:36:00 Author:Robert | Keyword: Darlington, Phototransistor, Optical Triggered Switch, Application | From:SeekIC

The picture shows the darlington type phototransistor optical triggered switch application circuit. Because of using the darlington type phototransistor and operational amplifier, the very weak light can flip the circuit. If the positions of R1 and phototransistor are be reversed, or the positions of the operational amplifier's out-phase and in-phase input ports are reversed, the circuit can modified to be triggered opening by the dark.



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