Pocket-sized stereo amplifier

In this 'ible, I'm gonna show you how to build a pocket-sized stereo amplifier.

Step 1 Inspiration and features

So...
Where did I get the inspiration from?
First, take a look at these 'ibles:
~http://www.instructables.com/id/Rechargable-pocket-sized-amplifier/(I love this one a lot; this 'ible is where I cheapened my final product... hehehe... :-) )
~http://www.instructables.com/id/Simple-iPod-Amp/

What do those have in common?
Well, they are cheap!, but... mono only.

Then these:
~http://www.instructables.com/id/DIY-Amplified-Speakers-for-your-MP3-player/
~http://www.fixup.net/tips/pktamp/
~http://tangentsoft.net/audio/cmoy-tutorial/parts.html

What do those have in common?
Their price.(Well, in my country)
As the cost of living rises and the stock exchange falls, it is important that WE! save.
And this is what I'm gonna do today.
And http://www.instructables.com/id/500_Ipod_Amplifier/ is out of da question.(You know why.)
Now... the features.

~Portable(obviously)
~Stereo(obviously)
Let's get started.

Comments

[Quercus austrina]

You've got the power connections backward for the 2nd amp. Battery + goes to the junction of the 2 resistors. Battery - goes to the bottom of the speakers.

As drawn, you'll cook the battery in no time flat. The + and - are connected together at the same junction mentioned above.

The circuit can push out about 6 mW with an 8 ohm speaker. A 32 ohm speaker will result in a 23 mW output. Just a suggestion for anyone wishing to mod this a little.

Qa

[LkArio]

Umm.. I think if you open holes for the speakers they'll sound louder 

[arikyeo]

 actually, without the holes, the speakers cause the metal can to vibrate and thus makng most wood surfaces turn into a loud speaker!!! :)

[BOOJAN]

use PCBwizard it helps a lot.....

[arikyeo]

thks, i'll remember dat.

[NuGFX]

Thanks but use a ruler next time

[arikyeo]

ok, ill remember that.

[mattyuke]

Please can you do a better picture of the drawing on step 3 because I want to do this cool instructable but i cant really read it. Thanks Matt

[arikyeo]

ok, i'll do that.

[mattyuke]

Thats really helpful thanks

[arikyeo]

done. i've republished the 'ible. see it for yrself

[mattyuke]

Thank you very much

[brunoip]

well done ;) check the source link

[ironsmiter]

(removed by author or community request)

[arikyeo]

thks a million!!!

[ironsmiter]

any time... great job on the ible!

[lemonie]

You've got a problem with the images. Check the file names / extensions as they're showing as unrecognised types. Also, at these resolutions they're unnecessarily large (probably). And be sure to add an image to each step. L

[ironsmiter]

(removed by author or community request)

[arikyeo]

oh yeah, these pics are direct copy from a camera(canon ixus 75). I did not have time to resize with Photoshop cs4. anyway, why the pics do not appear as pics??? they appear as files. why???

[lemonie]

As I advised originally: check the file names / extensions. You'd ideally want .jpg .jpeg

L

[ironsmiter]

(removed by author or community request)

[arikyeo]

ok, i know pscs4 is overkill, but dat's about de only image editing prog i know how to use!. ridiculous, but true

[Quercus austrina]

If you are a Windows user, you can do a really quick resize in Paint and save it as either a JPG or PNG. Lots quicker than firing up PhotoShop.

Qa