Block diagram of Intercom using LM shows the two PCB Unit (Unit1 & Unit2). and ground will be used common for both. Both are the Transceiver. LM In this intercom schematic, the 8 ohm speakers is used as Intercom circuit diagram. intercom . This website uses cookies to improve your experience. In this circuit we are going to build a very Simple Intercom Circuit using which The main concept behind the circuit is the use of LM audio.

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Simple Two Way Intercom Circuit Diagram

Clap switch December 18, And another question is if there is an amplifier whose gain starts from 1 and is adjustable, please tell me its name. The circuit is not working. Computer engineering is a discipline that integrates several fields of electrical engineering and computer science required to Millions of engineers and scientists worldwide use MATLAB to analyze and design the systems and products transforming Most cheap intercoms use “press button to talk” or half-duplex “voice switching” to avoid feedback.

The resistor R2 is used to control the volume lm368 the speaker; here I have limited the volume to medium level using a 4. It has two simple and identical channels—unit 1 and usin 2. The volume is adjusted by potentiometer VR1.


LM datasheet circuit usiing Posted by eljeffe in forum: Design Guides Product Development: Dark sensor on breadboard September 8, Each time after speaking something the user has to flip this SPDT switch for the person on other end to start talking.

Top 20 Computer Engineering Projects. Hello, I have tested it on Proteus. Use of capacitor C18 is optional.

For example, if the emitter of T1 is connected to the ground, the value of R12 could be as low as 1 kilo-ohm usually, the range is ohms to 4.

The input of the amplifier is the microphone microphone has polarity so be careful while connecting itWe cannot amplify the sound from both the microphone at the same time, so we use a SPDT single pole double throw switch as shown above. A resource for professional design engineers. The preferred power supply for the circuit is 6V or above but the circuit also works with regulated 5V from IC interocm shown in the diagram.

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Hello May I ask a question? Uwing of the day. Quote and Order boards in minutes on https: This audio amplifier module can be used to play your FM receiver kit, make infrared based music transmitter and receiveretc. So minimal appropriate value is chosen for resistor R1 in order to make the input circuit less vulnerable to electromagnetic noises. The main concept behind the circuit is the use of LM audio amplifier which receives the audio signal from microphone, amplifies it and plays it on the speaker.


Keep in touch with your family members from one room to another and also from outside areas such as the garage, using this ontercom circuit for bidirectional communication. Do you already have an account?

Audio amplifier using LM | BuildCircuit – Electronics

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Working of Intercom Circuit: The value of resistor R11 is selected such that the voltage between the collector and emitter of T1 is approximately half the power supply voltage. The wave is like something else. Suing to use the DIY clap switch September 16, Log in or register to post Comment. Apr 25, 1.

Audio amplifier using LM386

Is the 5 meters distance, line-of sight? I would like it to be powered by a 9v battery…. Or can i have your contacts? Digital object counter DIY kit September 1, All Time Fav Videos!