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FM_LIGHT_BEAM_TRANSMITTER

2016-04-09 08:31  
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FM_LIGHT_BEAM_TRANSMITTER
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.