The following shows electronics schematic diagram of Full-Duplex using TDA7052 audio power amplifier IC. The consists of Log. Potentiometer, Resistor, Carbon or Cermet Trimmer, Polyester, Electrolytic Capacitor, Transistor, Audio Power Amplifier, SPST miniature switch, miniature electret microphone, and a 8 Ohm .

Circuit Diagram for Full-Duplex Intercom

This device allows to operate two stations leaving the operator free of using his/her hands in some other occupation, thus avoiding the usual “push-to-talk” operation mode and capable of delivering about 1 Watt of output power at a supply voltage comprised in the 6 – 12V range. Find detail information about for Full-Duplex using TDA7052 Audio Power Amplifier IC here – source:

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