The circuit diagram of light signal receiving

Published:2011/3/29 20:03:00 Author:Ecco | Keyword: light signal receiving | From:SeekIC

This circuitry adopts the photoelectric cell IR-B2 M type to receive semaphore. Optics semaphore can be optical light or infrared light, and it takes the LED or semiconductor laser machine as light source, and the municipally frequency should be 0.5~2.0 KHZ. When the photocell is irradiated, it can produce quadrature voltage and be amplifiered by Q1, Q2, then the voltage will pass a output transformer which mutually matches with earphone impedance. Consequently, we can use earphone to hear the sound clearly.



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