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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LM datasheet circuit problem Posted by eljeffe in forum: Use of capacitor C18 is optional.

Intercom Using LM | Electronics For You

Follow the circuit diagram above and make the connections. Apr 26, 7. The complete circuit diagram of this Intercom Project is given below. One speaker will be used in set-1 and the other in set-2 as show in the circuit diagram.

Computer engineering is a discipline that integrates several fields of electrical engineering and computer science required to Apr 25, 1. This audio amplifier module can be used to play your FM receiver kit, make infrared based music transmitter and receiveretc.

The circuit also works with carbon microphones or other high-level and low-impedance microphones. Assemble the circuits for units 1 and 2 on separate general-purpose PCBs and enclose in ussing cabinets.


The wave is like something else. Dec 20, 10, 1, Now place the SPDT switch in a position and speak into the respective microphone your voice should be echoed on both the speakers. How does your intercom prevent acoustical feedback howling?

The circuit is built around two low-power LM audio amplifiers. 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.

Top 20 Computer Engineering Projects. Automated Plant Watering System. Well basically i want it one sided only 1 transmitter and 1 receiver and for starters about 5m apartwhat should i do?

Audio amplifier using LM386

,m386 another question is if there is an amplifier whose gain starts from 1 and is adjustable, please tell me its name. The complete working of the project is shown in the video below; you can l3m86 go interfom it if you are confused on how to use it. How to assemble infrared music transmitter and receiver DIY kit September 1, How to reduce noise distortion in audio amplifier? Yet another simple amplifier for your Arduino and music projects.

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. You May Also Like: 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.


Digital object counter DIY kit September 1, I would like it to be powered by a 9v battery…. Mar 14, 20, 5, How much supply vtg to give for the circuit. Log into your account. How to make an FM transmitter January 26, usign Auto-Detection l Bluetooth l Smart Multimeter.

The LM has a gain range from ; by default the value of gain is 20 but can be increased upto by using a capacitor across the pins 1 and 8. Please enter your comment! You can use any normal wire for a decent length, but if you need cover higher distance use a twisted pair cable like CAT5 to avoid being affected by noise.

Similarly place the switch in opposite position and talk into the other microphone and check if you can hear the sound on the speakers.