VOLICE_MODULATED_PULSE_FM_IR_TRANSMITTER

Published:2009/7/9 21:04:00 Author:May | From:SeekIC

This circuit has a 741 audio amplifier, which is fed by a microphone (use an amplified type), an FM modulator, and a CMOS timer that acts as a VCO. The LED is pulsed with the timer output (the booster circuit can be used for increased range). This yields an FM-modulated, pulsed IR beam.



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