The integrated chip LM386 is a low power audio frequency amplifier requiring a low level power supply . The IC is designed to deliver a voltage amplification of 20 without external add-on parts. But this voltage gain can be raised up to 200 (Vu = 200) by adding external parts.

soo today i am going to show you how to make a  low frequency audio amplifier using the LM386 .

Step 1: Getting Started






Have fun building your amp.. :)
<p>how low can the voltage go?</p>
Im getting high distortion.<br>And when i hold the power supply wire it decreases<br>
<p>please tell me where to get the audio jack online</p>
<p>I have made it. But lm385 is overheating. What could be the problem ?</p>
<p>Hi. can you make tutorial video.<br><br><br><br><br>PLEASE. :D</p>
<p>hi, i made the exact circuit, and it does work, but i'm having a major issue, it noisy. it almost sounds like some one crumpling newspaper on a microphone. i removed the 10uf capacitor between pins 1 and 10, and that seamed to help, is there anything else that may be causing the issue? thanks in advance!</p>
how would I filter the psu?
Filter the psu
<p>sorry, pins 1 and 8</p>
<p>Hi, I would like to amplify a 100-200 mv pulse to 5v DC. The frequency of the pulse would vary between 20-600 per second. At lower frequency the pulse is 100-200 mv, So I would like to amplify it to 5 volt. But at higher frequency the pulse goes upto 30-50 volts. So I would like to maintain the pulse to 5 volts at all frequencies So I need the schematics for it or the desired changes in the above schematics. Plz PlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlzPlz</p>
<p>Very interesting, thanks for sharing.</p>
<p>:)</p><p>its my pleasure sir,.....</p>
<p>Can i use a 3 watt 8 ohms speaker??</p>
<p>easy and cool . thanks for sharing.</p>
<p>pretty cool.</p><p>added to my collection.</p><p>will try to make.</p><p>thank you.</p>
<p>anytime sir. .. and thanx to you too .</p>

About This Instructable




More by Er Varun Goyal:LED MOBILE CHARGER.. low frequency audio amplifier using the LM386 DIY: Wooden Bead Keyring 
Add instructable to: