Sensitive photorelay circuit

Published:2012/8/28 22:51:00 Author:Ecco | Keyword: Sensitive photorelay | From:SeekIC

This circuit is adapted to be used as a grating switch with a high receiver sensitivity, the circuit switching threshold is 10Lx. In order to adjust the dark current, the circuit connects with potentiometer R1; when there is sufficient light intensity on phototransistor ( the lowest bit is 10Lx ), the last stage transistor turns on, the output voltage is about 19.5V.



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