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 , and a 8 Ohm Loudspeaker.

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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