Two Way Intercom Circuit Diagram. The switch will be in the house. Two way intercom ciruit.
The switches s1 s2 must be fixed in such a way that when the handset is resting on the cradle the switch is off and when it is taken off the cradle the switch turns on. For making two way intercom make two identical circuits and combine them as shown in diagram 2. The current consumption of the circuit.
Referring to the figure alongside we see that basically the circuit is comprised of two stages viz.
The main concept behind the circuit is the use of lm386 audio amplifier which receives the audio signal from microphone amplifies it and plays it on the speaker. Now connect output of one unit to speaker of other unit and vice versa and use independent power supply for two units and connect them with 3 core wire two wire for outputs and one wire for common ground is required for intercom connection. A very good quality and simple intercom circuit using only three transistors. Two way intercom ciruit.
