LIGHT_BEAM_RECEIVER

Published:2009/7/6 6:12:00 Author:May | From:SeekIC

Converts amplitude-modulated light beam back to audio signal for driving transistor radio earphone having resistance of 500-1000 ohms. Miniature 8-ohm loud-speaker can be used by adding output trans-former such as Radio Shack 273-1380. Gain of opamp is controlled by R3, which can be trimmer resistor or pot. Designed for use with transmitter providing amplitude modulation of LED, for short-range voice communication.-F. M. Mims, Optoelectronic Projects, Vol. 1, Radio Shack, Fort Worth, TX, 1977, 2nd Ed., p 44-54.



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