FM_LIGHT_BEAM_TRANSMITTER

Published:2009/6/16 23:52:00 Author:May | From:SeekIC

This transmitter uses two-stage amplifier Q1/Q2 to frequency modulate an NE555 (configured as a VCO) operating at about 50 kHz. The resultant FM-modulated pulse train is converted to light pulses via LED1 through LED4, driven by Q3 and Q4.



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