The following circuit diagram shows electronics schematic diagram of Full-Duplex Intercom using TDA7052 audio power amplifier IC. The circuit diagram 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 Loudspeaker.
This device allows to operate two intercom 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 Circuit Diagram for Full-Duplex Intercom using TDA7052 Audio Power Amplifier IC here – source: redcircuits.com.