Intercom Clone circuit | Next Electronics

TDA1521 / TDA1521Q: 12W Stereo Amplifier

This is a stereo audio amplifier circuit that delivers 12W output power for each audio channel. The circuit is constructed using a single integrated circuit, the TDA1521 or TDA1521Q, and is supported by a minimal number of external components. The stereo...

Power AmplifierCircuit and Schematics for 25 Watts-IC TDA2009

Power amplifier circuit diagram with schematics. This simple audio power amplifier circuit is designed for 25 watts output power using TDA 2009 IC, which has two channels (stereo), 12.5 W for each channel. The described power amplifier circuit utilizes the TDA...

TDA7295 80W Audio Amplifier

The IC TDA7295 is a monolithic integrated circuit designed for use as an audio class AB amplifier in high-fidelity applications, including home theaters and high-end televisions. The TDA7295 is a versatile audio amplifier that delivers high-quality sound reproduction, making it suitable...

The Link Telephone Intercom

It uses old pulse dial handsets and replaces the AC bell set with a 9 volt DC buzzer. The whole circuit runs from a 12 volt regulated DC supply and is suitable for short term battery operation (eg: Gel Cell)....

7 Watt Audio Power Amplifier Circuit Schematic

This compact amplifier is built around the TDA2003 integrated circuit, which can deliver 4W RMS at a 4-ohm load. The TDA2003 offers enhanced performance while maintaining the same pin configuration as the TDA2002. It retains the advantageous features of the...

Bi-directional intercom system

This is a very small telephone exchange attached only two ordinary Tele phones. Fully bi-directional facility with an intercom system. When a phone is in off hook condition, Exchange will detect it & send ringing pulse to other phone. When...

call acknowledged schematics

This circuit can be utilized by individuals, such as a gentleman summoning his butler, a manager calling for his secretary, or, as in the author's case, to call children down for dinner without raising one's voice over the noise of...

Low impedance microphone amp

The circuit is a microphone amplifier for use with low impedance (~200 ohm) microphones. It will work with stabilized voltages between 9-30VDC. If you don`t build the impedance adapter part with T1, you get a micamp for higher impedance microphones....

Intercom circuit with LM380

Very simple and useful circuit for communication between two persons. The Q1 is used to amplify the weak output signal of the speaker when one pushes his (her) side push-button to speak. The base-common configuration of the Q1 pre-amplifier is...