IR_LASER_LIGHT_DETECTOR

Published:2009/6/22 22:28:00 Author:May | From:SeekIC

The universal Iaser light detector. The output of the LM386 audio amplifier can be connected to a small 8-Ω speaker or ear-phone. Two 9-V batteries provide power. Decrease R1 to lower sensitivity; increase R3 to increase gain of the op amp (avoid very high gain or the op amp might oscillate). Q1 is an infrared phototransistor.



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