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This project brings in the childhood memory of using matchboxes with thread to build a simple telephone. Working of Intercom Circuit: Resistor R12 should have a minimal value. So the microphones and the loudspeakers should not face each other.
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The audio amplifier amplifies the sound of FM receiver. Assemble the circuits for units 1 and 2 on separate general-purpose PCBs and enclose in suitable cabinets. Reference design for Laser Drive Applications 6 December Tuesday, January 1, It is important that there is no acoustical feedback between the microphone and the hsing on both the sides.
Is the 5 meters distance, line-of sight? The circuit is built around two low-power LM audio amplifiers. You can experiment with values from 1kk to get the volume of your choice.
How to use infrared based music transmitter and receiver. Follow the circuit diagram above and make the connections.
LM386 electronic intercom circuit
Circuit diagram and the photograph you kept are different in connections. Embedded Hardware Engineer 28 December Basics, Usage, Parameters and Applications. Top 20 Computer Engineering Projects. The resistor R2 is used to control the volume of the speaker; here I have limited the volume to medium level using a 4.
Do you already have an account? At least guide me to basic idea about making it wirelessdo i use infra transmitter?
Project Engineer 22 Intercm I just used a normal wire for demonstration and the set-up looks something like this below: I just used a normal wire for demonstration and the set-up looks something like this below:.
As you can see the circuit is very simple and can be easily built over a breadboard.
LM electronic intercom circuit
The circuit can also run on voltage between 5V to 12V so choose a power supply which you are comfortable interclm. How to change possitive supply to negative supply.
Signal from the microphone is filtered by the combination of resistor R2 and capacitor C1.
How to use a relay November 15, That is a duplex design so you would need to use to two transmitters and receivers on separate frequencies. Automated Plant Watering System.
Intercom Using LM386
Apr 26, 2. Clap switch December 18, The volume is adjusted by potentiometer VR1. But, will the sound of the person of any microphone be heard in both speakers? The interxom of the amplifier pin 5 is connected to both the intercm.
The complete circuit diagram of this Intercom Project is given below. Computer engineering is a discipline that integrates several fields of electrical engineering and computer science required to Please enter your name here. Power Bank for Smartphones. I need to ask some questions about the circuit diagram.
One speaker will be used in set-1 and the other in set-2 as show in the circuit diagram. How to assemble infrared music transmitter and receiver DIY kit September 1, Quote and Order boards in minutes on https: Keep the interconnection cables as short as possible—preferably shorter than 10 metres. When you speak in front of the microphone MIC1the low-level signal is amplified by the amplifier built around interom T1.
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. I did this but it is not working.