Electrical Engineering Stack Exchange
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Questions tagged [lm386]

The LM386 is a "Low Voltage Audio Power Amplifier"

The LM386 is a "Low Voltage Audio Power Amplifier".

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139 questions
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(How) does LM386 allow an input past its negative rail?

I am confused by the LM386. In the data sheet, multiple examples connect the inverting input directly to ground. To me, that feels weird. How can the IC amplify if the input goes below GND? The data sheet goes on: when left unconnected (or AC…
polwel
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How do I start debugging this circuit?

I recently got a small LM386M-1 based amplifier kit, mainly to practice my SMD soldering. I managed to solder it, but it's giving me unexpected results. Here's the schematic: The input signal is supposed to be connected to NF (for positive) and…
AndrejaKo
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What is making this LM386 circuit so distorted?

I found this circuit on a YouTube video and tried copying it down into a circuit for testing, but the audio that comes out of it is really low quality and distorted. I don't expect sterling quality out of a quick hobby circuit like this, but I do…
Michael Cordingley
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Can I use one LM386 amplifier to drive 2 speakers(no stereo needed)?

Can I connect 2 speakers to the same output of the LM386 audio amplifier?
Mihai HG
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1 answer

Using an LM386 with input and output transformers for isolation from power supply

The LM386 TI applications notes page 11 show an amplifier. Would like to use this chip with complete isolation of the output speaker and with the addition of an isolated input speaker. Am using impedance matching transformers on input and output…
Roy Z
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Invisible Earbuds

I just made a pair of invisible earbuds using this guide http://www.instructables.com/id/Make-Your-Invisible-Earphones/?ALLSTEPS everything works fine using 6mm x 6mm magnets that sit in my outer ear and not near the ear drum. I use it to listen to…
ArcticWolf_11
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Circuit for sound detector using LM 386

I want to build a sound detector circuit for my project. I am free to use any amplifier but not much complex circuitry. I googled and found this circuit using LM 386. Is this good enough or is there any better and more efficient circuit and/or…
Anuj
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