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Proximity detector

2017-09-04 10:48  
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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 Dl
Proximity detector

The circuit can be split into three distinct stages; the infra-red transmitter, the photo-diode amplifier, and a variable threshold comparator.



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