intercom circuit using lm386 ic


Posted on Feb 5, 2014

The circuit mentioned here is a small easy to build Intercom circuit using one LM386 IC one 2N3904 transistor and few other components. LM386 is a very famous amplifier ICs mostly used by electronics hobbyists in audio circuits. In this circuit the 8 ohms speakers are used for both purposes one as speaker and second as microphone. The 10K variabl


intercom circuit using lm386 ic
Click here to download the full size of the above Circuit.

e resistor is used to adjust the volume and 5K variable resistor between the pin 1 and 8 is used to adjust the gain. For switch use DPDT push switches on the both sides. Also include the power on off connection with in the DPDT push switch it will save the battery connected to the circuit all the time and the battery will only connect to the circuit when some one push the switch for talking. Use 9V battery or 9V power supply with the circuit.




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