I have an audio output that im trying to attach to an LM386 chip. The schematics are pretty easy to figure out in deciding which one i need. I used the one with minimum parts. Unfortunately the volume output has some noise in the background.

I tried making the connections better, and it helped(like the ground and what not) but i still get background noise.

Any suggestions guys?



P.S. the output was the audio from my laptop.

P.S.S. Here's the link to the data sheet.

http://www.biltek.tubitak.gov.tr/gelisim/elektronik/dosyalar/6/LM386.pdf
the schematics are page 5

 

Did you adequately bypass Vs (pin6) with ceramic caps?
Try putting a small inductor in series with the VS to clean it up.
The actual path of the ground return is also important.

 

Maybe the output of your laptop produces computer noise.