$5 cheap headphone amp / stereo buffer board - diyAudio
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Old 5th November 2007, 01:49 AM   #1
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Default $5 cheap headphone amp / stereo buffer board

About 2 years ago I told my brother in law (who is not an engineer) that I'd help him build a headphone amplifier.
Well, we all know how helping relatives goes. It's usually all talk. And it was, until I decided that I really ought to get something done so he doesn't dislike me over a headphone amp. I drew some boards in Eagle and had them made. The board is very simple, I'm sure anyone could solder it. If I was making it for myself I would have made it half the size and used all SMT components but it's a lot cheaper this way. It's a single sided through-hole wide-track board with two jumpers. It honestly doesn't get much simpler than this board.

Boards are $5 each and $3 shipping for however many boards you want via USPS inside the USA. If there is considerable interest (commitment) I can put together part kits. I have 18 boards to sell. Please PM me if interested, and please ask if you have questions.
If you want more than a couple boards we can work out a price.


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Old 5th November 2007, 03:05 AM   #2
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Hi

The Op-Amp in the schematic is wrong.

You must connect the inverting input to the junction point of R8 and R7 , and vice versa ...
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Old 5th November 2007, 11:01 AM   #3
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how in the hell did I do that?!

well it looks as though I've made a comparator board. crap.
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Old 5th November 2007, 11:33 AM   #4
Nordic is offline Nordic  South Africa
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lol, next time, build a prototype first.
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Old 5th November 2007, 12:12 PM   #5
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Red face $2 boards now...

Well it's through hole so you can just swap the leads going to pins 2 and 3. I'll sell them for $2 a piece.
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Old 13th November 2007, 01:19 PM   #6
jaste is offline jaste  Sweden
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Hi, what would the shipping be for Sweden? And are you intrested in sending a board overseas?
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Old 13th November 2007, 01:39 PM   #7
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The shipping would presumably be no more expensive than inside the USA. The boards are small and light.
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Old 15th November 2007, 06:49 PM   #8
jaste is offline jaste  Sweden
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What are the dimensions of the board?
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Old 19th November 2007, 05:25 PM   #9
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It is less than 4cm x 2cm. I will get the exact dimensions when I go home later today.
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