PTOXIMITY_DETECTOR

Published:2009/6/24 23:09:00 Author:Jessie | From:SeekIC

The proximity sensor works on the principle of transmitting a beam of modulated infra-red light from the emitter diode LED2, and receiving reflections from objects passing in front of the beam with a photodiode detector D1. The circuit can be split into three distinct stages; the infra-red transmitter, the photodiode amplofoer, and a variable threshol comparator.



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