Sound circuit: TDA2616
Source: InternetPublisher:狂妄火龙果 Updated: 2015/09/10
TDA2616 pin functions and reference voltage:
Pin 1: 10V - signal input 1
Pin 2: 5V - Squelch (low level noise suppression)
Pin 3: 10V——1/2 reference voltage
Pin 4: 10V - signal output 1
Pin 5: 0V - ground
Pin 6: 10V - signal output 2
Pin 7: 20V - power supply
Pin 8: 10V - negative input terminal
Pin 9: 10V - signal input 2
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