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Two channel audio mixer circuit design electronic project

This audio mixer circuit diagram electronic project is designed using few common electronic components . This audio mixer circuit project has two input channels . The input signal can be independently controlled using the R1 and R2 variable resistors.
The R3 variable resistor offers possibility to fade out one of the signal while the other signal is fading in . The gain of the mixer is provided by the 2N3563 NPN transistor .
The R4 variable resistor connected at the audio mixers output offer possibility to control the output signal volume .

Electronic Circuits: 
Circuit Diagram: 
Two channel audio mixer circuit design electronic project

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