Simple Two Way Intercom Circuit Diagram Working of Intercom Circuit: Follow the circuit diagram above and make the connections. To make the project more attractive you can use long wires to increase the distance between the set-1 and set-2 microphone and speaker. Two Way Intercom - Engineers Garage Intercom is useful circuit that keeps you in touch with your family member present in another room without moving from your place. The speaker volume can be adjusted with the help of variable resistor VR1 the circuit to operate as two way intercom make two identical circuits as Simple Two Way Communication Intercom Circuit Schematic Simple Two Way Communication Intercom Circuit Schematic diagram Gallery of Electronic Circuits and projects, providing lot of DIY circuit diagrams, Robotics & Microcontroller Projects, Electronic development tools Audio Circuits: Intercom Electronic Circuits Build an Intercom Station Expander - It's called the "Addacom" and it lets you add four extra stations to any existing 2-way intercom. __ SiliconChip Calling Bell using an Intercom - Here is a simple calling bell circuit that can be used in small offices to call the office boy using an existing intercom system.