IR_RECEIVER

Published:2009/7/7 8:21:00 Author:May | From:SeekIC

Infrared emissions detected by Q1 are fed through U1a to U1b, which amplifies the signal by a factor of 100. The amplified output of U1b is fed to U1c through R9, C2, and R6. Potentiometer R9 serves as a volume control. With R9 set to pass the maximum signal, U1c provides a gain of 100, for a total system gain of 10,000 dB. The output of U1c is connected to voltage follower circuit U1d to better match and drive headphones that can be plugged into J1.



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