Make a Simple Audio Amplifier

Step 10 Testing

10- Last but not the least join the +Ve of 9V battery with the 6th pin of IC and -Ve of the battery with the 4th pin of IC.

Congratulation !!! you have made your own simple audio amplifier.

Now the time to check it out.Join the male jack with your mp3 player or musical instrument and female with the speakers.Now adjust the Volume and Gain to get the best and loudest possible sound.I should notify you that with this amplifier only one speaker will work.And do the adjustment from low to high.Do the adjustment carefully or it can damage your speakers.

You can change the input jacks as your requirement.You can add a 220 micro farad variable capacitor instead of simple 220 micro farad capacitor to change the bass.

ENJOY !!!!

Comments

[zzmm89zz]

great job! is there any way to increase the quality? perhaps a bandwidth filter?

[rajat kosh]

I recommend you TDA IC or go to http://www.hobby-hour.com/electronics/power-audio-amplifier-ic.php for your quality amplifier

[=haineux=]

The LM386 is not an audiophile part. It also will not output a lot of power.

You need to find a different circuit. Try searching for one using a Tripath Class T chip.

[dan1023]

Hey, if you built this, what voltage capacitors did you use? Really need some help with this. Hope ur reply comes soon : )

[zzmm89zz]

Hi, you need to use the capacitors listed in this instructable, which are: 220 uF 100 uF .01 uF .047 uF Maybe these last two confused you since the author didn't include the units. All of these capacitors should be in microfarads. Also, make sure the voltage rating is at least 9V (since the battery is 9V). My capacitors were rated up to 16V and worked fine.

[Karlisz]

How much W does it output? I want to power 2x 2W 8ohm speakers ! Will it be ok?
Thanks!

[=haineux=]

It will drive the speakers, but won't run them at maximum power. It might be loud enough, but that's for you to decide.

[hasnain101]

:@:@:@:@:@: ZABI RAuf PLzzz Tell ME Where U GEt tHIS ic (lm386) ..........................................

[=haineux=]

Radio Shack, Amazon, DigiKey, Mouser, MCM, Octopart.com

[zabi_rauf]

I got it from the electronics store in my area.

[hasnain101]

Are U pakistani


But In My Are electric store Did not Have This Ic.Can U Give ME this Ic


WHERE DO U LIVE ?

PLZ TELL ME

[zabi_rauf]

Yes i am. And im in lhr

[hasnainahmed101]

plz give me your number Or add me on facebook


[e-mail]

[Md Wajahat]

Hi, i just went through the article and looks great, can i get a stereo ouput from the circuit ? I want to connect two speakers that should behave in stereo manner...

Please Help...

Thanks

[zabi_rauf]

This guide is for mono

[max1919]

make 2x this... each one for each speaker

[Md Wajahat]

Thanks for the updates...

lets say the output coming from ipod give three outputs like 1 2 and 3, output 1 is common for both, and the output 2 for first speaker and the output 3 for second speaker...

Just wondering, if i use pair of 1&2 and conect to this circuit and play one speaker, and create another similar circuit and connect output 1&3 to play another speaker...

Lets say the above scenario worked fine, question is whether the sound will get distributed? like i want stereo output on two different speakers as similar to my left and right ear beats change...

Thanks

[max1919]

Great instructions, thank you!
It works great with 12ohm 0.5W speaker... gain is big and sound is clear.

[rexty]

god damn thing works :D:D;D .....took me a whole day , yet worth it

[harleyy]

thanks alot, im going to try.

[neuthral]

Works like a charm! :) Didn't see a difference changing the 220 capacitor thou

[jlei]

Hey bro, i would like to try your work. But i would like connect the ckt to a 220 volt power supply instead of a 9V battery. What else do i need? Wt type of transformer, (its rating)? And ofc0urse a rectifier. Can you please help me do that. Thank u! Hope to receive ur reply soon.

[irvinaby]

it works perfectly, thank you.