ALL CREDIT FOR THIS SCHEMATIC AND AMP GO TO OSGELD OVER AT INSTRUCTABLES, who said I could share his amp over here. It's a simple audio amp, can operate between 4-12 volts. Only takes four parts, all obtainable at radio shack for under $10, or be scavenged easily from other electronics:

10k potentiometer
220 uf 16v capacitor
0.1 uf ceramic cap
LM386 IC
Some wire

(LINKS TO CHEAP PARTS)
2x 10k Potentiometers http://cgi.ebay.com/2pcs-10K-B-Type-Lin ... 4aa213b90d

20x 0.1 uf Cermaic Capacitors http://cgi.ebay.com/20-pcs-0-1uF-50Vdc- ... 27b328b273

20x 220 uf 16v Electrolytic Capacitors http://cgi.ebay.com/20-pcs-220uF-16V-El ... 27b329719a

5x LM386 ICs http://cgi.ebay.com/5-pcs-LM386-LM386L- ... 5ad47a6a3b

http://i636.photobucket.com/albums/uu90/zeturi/easylm386.jpg


That is how everything connects. If you take a look at osgeld's instructable, you'll see that he has a very compact arrangement for the parts.

If you want to know, gain is 20 with this schematic. If you want, connect a 10uf capacitor between pins 1 and 8, with the negative leg towards pin eight. This will give the amp a 200 gain. I tried this, but I found that it made sounds way too staticy and distorted. Without it, it still sounds good.

Enjoy your small, cheap audio amp.

Cool, thanks for posting this! I may use this audio amp for a NOACp or an SDGOACp.

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Ok, replaced the instructable link in the sticky with this thread.

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JLEEEEEEEEEESUS

EXACTLY WHAT I NEEDED

I will engrave your name into the back of my GCp.

SS

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I'm glad this is of use. I'm pretty sure you could replace the pot with tacts if you prefer, but I would have no idea how. I heard about that somewhere, I'll do some quick hunting and see what comes up.

You would need a digital pot circuit to do that.

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Yurp.

SS

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like LOB's?

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I would like to bump this topic with some link to cheap ebay suppliers. The stuff that I'm linking is:

2x 10k Potentiometers http://cgi.ebay.com/2pcs-10K-B-Type-Lin ... 4aa213b90d

20x 0.1 uf Cermaic Capacitors http://cgi.ebay.com/20-pcs-0-1uF-50Vdc- ... 27b328b273

20x 220 uf 16v Electrolytic Capacitors http://cgi.ebay.com/20-pcs-220uF-16V-El ... 27b329719a

5x LM386 ICs http://cgi.ebay.com/5-pcs-LM386-LM386L- ... 5ad47a6a3b

This gives you enough parts to make 2 complete LM386 audio amplifiers, and you only need to buy more potentiometers to make another 3. These particular links only total to $8.46 for all required parts.

NOW TO DEFEND TEH AMP

I know some folks say this amp is a total waste of time and sounds like utter crap. However, I have built and used this amp with a Gamecube and Genesis with good results. If anyone else has built one of these, please give some feedback on how well it worked for you.

I built one. Its sucked spectacularly bad. But I did scrounge all the caps and they werent quite the same as the spec'd ones.

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