multi channel audio mixer using lm 3900


Posted on Feb 6, 2014

By adding the same circuit parallel with this, you can increase the number of inputs according to the applications. Each input is connected to the inverting terminal of LM3900. The built in amplifier of each section amplifies every audio input separately and is fed to the output terminals. The output terminal from each channel is connected to a si


multi channel audio mixer using lm 3900
Click here to download the full size of the above Circuit.

ngle output line with a resistance not greater than 680K and produces a mixed audio at the output with very low noise. This audio mixer circuit doesn`t use a low impedance input to mix idealsources. Capacitors C1 to C4 are the decoupling capacitors for the corresponding channels. C5 is the output decoupling capacitor. If the power supply circuit is far from the mixer circuit, then a 100uF/50V electrolytic capacitor must be connected from the positive supply rail to the ground.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    InfraRed Jammer with 555
    Power amplifier
    The Star-Delta 3-phase Motor Starting Method
    Circuit Description
    DTMF Transeivers
    MC34017A Telephone Tone Ringer Bipolar Linear/I2L
    DC motor speed controller with 555 timer
    Using the Panasonic WM61A as a Measurement Microphone
    X Infrared Remote Control



    Top