13 Aug AM-FM radio amplifiers; Portable tape player amplifiers; Intercoms; TV sound systems; Line drivers; Ultrasonic drivers; Small servo drivers. Browse through a total of 9 LM Circuits and projects. In this intercom schematic, the 8 ohm speakers is used as microphone and listening speaker. LM In this intercom schematic, the 8 ohm speakers is used as Intercom circuit diagram. intercom . This website uses cookies to improve your experience.

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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.

LM has a wide supply voltage range v. Log in or register to post Comment. Pin 3 is the positive input terminal, in which sound signal is fed to be amplified.

Useful Raspberry Pi Projects. Check this one to take input from 3. How does your intercom prevent km386 feedback howling? The potentiometer can be replaced with a preset of the same value because the volume need not be adjusted frequently.


Heart Of Smart Workplaces 7 November After rigging it up and while testing there is a constant hissing noise in the background. A low cost LM based Audio Amplifier is available on www. How to reduce noise distortion in audio amplifier? If a higher dynamic range is needed, the power supply should be 9V or even 12V.

As the gain of each channel is not very high, the probability of acoustical feedback is low. Dear Sir, Inrercom would like to use the amplifier for hearing aid.

LM electronic intercom circuit

It can also be used as sound sensor for microcontrollers. Auto-Detection l Bluetooth l Smart Multimeter.

Is there any programming for arduino in this project. You May Also Like: How to make an FM transmitter January 26, Aug 22, 17 2.

Intercom circuit using lm | All About Circuits

What do i do? Can I have the detail calcification for the design of the circuit? You can experiment with values from 1kk to get the volume of your choice. If you want other than line-of-sight then it would need to be RF.


As shown in Fig. Adjusting the potentiometer only agravates the noise! Can I use this design as interco, amplifier; I mean dual channel amplifier. Log in or register to post Comment. LM is a low voltage audio amplifier and frequently used in battery powered music devices like radios, guitars, toys etc.

Intercom circuit using lm386

No, you should use Signal generator and generate square wave for simulate a clap sound in Proteus. Yet another uskng amplifier for your Arduino and music projects.

The preamplifier may exhibit instability at very high frequencies. Yes, in fact the speaker used is 8 ohm 0. Check the LM data sheet for confirmation.

For power supply, you can use an AC-DC wall adaptor, dry batteries or rechargeable batteries.