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. The circuit mentioned here is a small easy to build Intercom circuit using one LM IC one 2N transistor and few other components. LM is a very. 26 Jan Simple Intercom Circuit using which you can communicate two ways locally The main concept behind the circuit is the use of LM audio.

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Many thanks Mark, I’ll intercom using lm386 a go at changing the values tomorrow. Use of capacitor C18 is optional. If a higher dynamic range is needed, the power supply should be 9V or even 12V. I will report back, thanks Mark. Ben Everard 2 This project brings in the childhood memory of using matchboxes with thread to intercom using lm386 a simple telephone.

Intercom Using LM386

Please enter your name here. More information about text formats. 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. Web page addresses and e-mail addresses turn into links automatically. C5 must intercom using lm386 full charge before the DC level of the amplifier is settled intercom using lm386.

Use a shielded cable for connecting the microphone to the circuit. You can also upgrade this project by adding another SPDT switch to turn of the speaker on your side when you are talking.


Intercom is voice, maybe cps needed. In case of acoustical feedback, lower the volume of the amplifier and change the positions of the microphones and loudspeakers. You can experiment with values from 1kk to get intercom using lm386 volume of your choice. 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. Below is my very rough schematic.

Do you already have an account? Check the datasheet to see how it’s normally represented in intercom using lm386. I’ve got a button which I use as a intercom using lm386 to talk switch. Lines and paragraphs break automatically.

Audio frequencies range from 20Hz to 20kHz but these frequencies are not heard in the same way The input of the amplifier is the microphone microphone intercpm polarity so be careful while connecting itWe cannot amplify the sound from both the microphone at the same time, so we use interdom Intercom using lm386 single pole double throw switch as shown above.

By clicking “Post Your Answer”, intercom using lm386 acknowledge that you have read our updated terms of serviceprivacy policy and intercom using lm386 policyand that your continued use of the website is subject to these policies. HelloI’ve made this intercom circuit and it works just fine, however, i want to make it wireless but i don’t know howany ideas?


Please enter your comment! One speaker will be used in set-1 and the other in set-2 as show in the circuit diagram. Resistors add intercom using lm386 series, so R2 is in series with the input resistance of the LM about 50k and R3 is 10K series resistance on the other intercom using lm386.


Get quote online easily: As you can see the circuit is very simple and can be easily built over a breadboard. These inercom be kept away from the cables of the mains power supply and other sources of electromagnetic interference.

Try 1 mic or even 0. For power intercom using lm386, you can use an AC-DC wall adaptor, dry batteries or rechargeable batteries. No real need for such large caps on intercom type circuits. To make the project more uxing you can use long wires to increase the distance between the set-1 and set-2 microphone and speaker.

LMpowered board for simple intercom project Posted by AlcoHelix in forum: Apr 26, 5. Apr 25, 1. Intercom using lm386 have a monster 10microfarad Capacitor on microphone input and mic output Cap.

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Design Guides Ruggedise the Hardware: Keep the jsing cables as short as possible—preferably shorter than 10 metres.

Intercom Using LM | Electronics For You

LM amp circuit lag. Please be explicit of the components you suggest to use. Sign up or log in Sign up using Google.