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Build Portable Mp3 Player
Posted by
CmdrTaco
on Fri Apr 28, 2000 01:53 PM
from the fun-stuff-to-build dept.
from the fun-stuff-to-build dept.
Greenpiece/Toasty writes: "Build your own portable MP3 player around 8000-9000 Yen. Uses 32 Megabyte flash media cards its the ultimate in geek. The link can be found here with circuit diagrams and pictures of the finished product. The kit can also be bought, but not from that page; another company is manufacturing it in Japan. The board seems quite easy to manufacture. "
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Build Portable Mp3 Player
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Some Assembly Required (Score:3)
(Is it me, or do others detect a "glut" of designs that are almost identical to the Rio?)
I don't see much point in having to integrate my own "Rio" when it provides no more functionality.
If the design provided some reasonable way of storing 1GB of data, cheaply, that sure would be interesting.
But another "me too!" design integrating together a synthesizer, some simple CPU/DSP, parallel interface, and a 32MB chunk of "flash" memory just does not excite.
Re:Noisy circuitry! (Score:3)
There is absolutely nothing wrong with using veroboard for a prototype, or even for a finished design! Keep your decoupling caps very close (on top or under if you can) and keep the DAC and amp far away from the DSP and processor and you'll be fine.
As someone who's built lots of low-noise (0.1mV sensitivity) and/or medium speed (40MHz) equipment on protoboard first, I know what I'm talking about. You can always throw copper shield up around the sensitive components and keep the power supplies clean with carefully selected bypass caps and even lowish resistances. Or get fancy and use ferrite.
If it is true veroboard (with tracks, as opposed to the board-only stuff I like), you can just rip off the copper you don't need and down goes all your sensitivity issues. True you haven't got a ground plane but if you can keep everything encased in grounded metal sheild you're flying high.
where can i get a cheap laptop? (Score:3)
#----------------------------
$mrp=~s/mrp/elite god/g;
Interesting But... (Score:3)
Picked mine up at an online auction site for about $50...
http://www.wantads.com
They always have a buttload of em.
Re:Exchange rate (Score:3)
--
"And is the Tao in the DOS for a personal computer?"
Link for kit! (Score:3)
And the cheapest car mp3 player is... (Score:4)
My car came with a pretty good casette player, so I didn't want to replace it. Instead, I got a casette adapter from Future Shop, that plugs into the line out of any cd player/sound card. I also bought a lighter power adapter for my old Thinkpad laptop.
The total cost for the adapters and laptop was around $600CAD, which is pretty steep. But I get to play mp3s in my car off my mp3 cds, and have a laptop that is usefull for something other than just that.
So IMHO, this is the best solution to having a car mp3 player. Feel free to disagree though...
Exchange rate (Score:5)
Today 108 yen = 1 USD.
So 8000-9000 yen = $74-$83
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Have Exchange users? Want to run Linux? Can't afford OpenMail?
Another site (Score:5)
Soundbastard [go.to]
/.ers complaing about a hack. How sad. (Score:5)
"Oh, I can get a Rio for the same amount."
Pah. A pox on you and your like. Whatever happened to pure HACK VALUE? Sorry, but building the equivalent of a commercial machine for fun is neat, fun, and educational.
Go buy your little Rio and leave the real hackers be.
Dave