Hello everyone, I made an lm386 audio amplifier circuit (with switch for added bass boost setting) and I am wondering how I plug in an mp3 player/phone as an input. For now I've been using an electret microphone and it works fine but I get some feedback and I want to play songs instead. Do I use a 3.5mm mono cable (I think I've figured that a stereo cable won't apply from what I've read) and female mono jack? what would be a good website/source for buying these parts? Also, for a homemade portable mp3 player/boombox, what would be possibly a better amplifier? Thank you in advance for your responses

 

This might be part of the answer.

 

Buying parts? What country are you in?
Mouser, Jameco, Digikey...Google is your friend.
There are several high power audio chips. What do you call, "better".
Something that runs on (4) D cells? Something that needs a small Car battery?