The dual-channel infrared sound volume remote control circuit

Published:2011/7/20 22:40:00 Author:Borg | Keyword: sound volume, remote control | From:SeekIC

The dual-channel sound volume remote control uses 4 keys: CHL+(the left sound channel volume increases), CHL-(the left sound channel volume decreases), CHR+(the right sound channel volume increases), CHR-(the right sound channel volume decreases). IC1 is the preamplifier of infrared, the 5mH inductor and 3300pF capacitor compose the filter circuit which outputs the modulation signal from ①, the signal is sent to IC2 for decoding after its phase is reversed by T1.



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