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:

New Circuits

.

 


Popular Circuits

90Vrms voltage regulator
12V Auto-Powered Circuit For Cassette Recorders
Prology DVD-200 remote control
Light Activated Day Night Switch Circuit
Negative Charge Pump with Ring Oscillator
Headlamp dimmer controlled foglamps FORD RAPTOR
Attaching a GPS module to the EB675001DIP
Spark-Gap Tesla Transformer
12dB-oct by the OP amplifiers low-pass filter



Top