Position: Index > Audio Circuit >

LM381 4 channel audio mixer electronic project

2014-11-05 06:58  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.

Electronic project presented in this circuit diagram is a very simple low cost 4 channel audio mixer . This 4 channel audio mixer electronic project is based on the lm381 low noise dual preamplifier IC .

Electronic cricket sound generator TDA7250 high power audio aplifier circuit diagram electronic project Class A amplifier electronic project circuit diagram using TDA1034 audio IC Two-channel mixing desk circuit diagram

Each of the two amplifiers of lm381 is completely independent, with individual internal power supply decoupler-regulator, providing 120 dB supply rejection and 60 dB channel separation. Other outstanding features include high gain (112 dB), large output voltage swing (VCC b 2V) p-p, and wide power bandwidth (75 kHz, 20 Vp-p).
High gain op amp combines up to four individually controlled input signals . The dc power source should be well filtered , and the circuit should be well shielded to prevent hum pickup .
If you require more audio inputs you can add more inputs , by connecting another 1uF capacitor in series with a 500k potentiometer to the network .
For powering this audio mixer electronic project you can use a DC power supply circuit (or a battery ) that will provide an output voltage between 9 and 24 volts .

simple 4 channel audio mixer electronic project circuit diagram using lm381