TUTORIAL - Lm386 Audio Amplifier

LM386 AUDIO AMPLIFIER

Well, today we are going to make a really nice audio amplifier.. I chose this one because it is quite simple to build and the parts are cheap! For the lm386 you can get free samples from the texas instruments' site.

This is what you need:

1 - lm386

1 – 10 ohm resistor

1 – 10K potentiometer

1- 220 uf polarized capacitor

1 – 100 uf polarized capacitor

1- 10 uf polarized capacitor

1 – .01 uf ceramic capacitor

1 – .047uf ceramic capacitor

2 – audio jacks

1- 9 volt battery clip

1 – 9 volt battery

1 - breadboard

Some wire

A speaker (you can use some old speaker from your car or something like that)

This time I'm going to give you the schematics and you'll be doing the hardwork :)

If something isn't going the way it should, just post a comment or e-mail me..

Watch out for the electrolytic capacitor's polarity :

Schematics:

And this is what you should get:

Now, if you want to do an amplifier to keep, you should get an enclosure, an LED and a switch.

Buy a PCB and solder the components to the PCB, make a circuit using the LED and the switch between the V+ and the pin 6 from the LM386.

I'll show you mine and I hope to get some answer from you.