Make: Online : DIY MultiMediaCard MP3 player

DIY MultiMediaCard MP3 player

I think this might be my new MP3 player. This MP3 player uses cheap MMC for storage, powered by a single AAA battery running a 20 Mhz chip which can play files up to 256 kBps at 44.1 kHz. ID3 support, Nokia LCD screen, micro joystick, not bad at all. Full schematic & pcb, hex file available. I think encasing this in clear lucite would be rad. Link.

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Posted by: jakari on April 27, 2005 at 5:04 PM

Except that the source code to actually run the PIC costs 265 euros for educational customers, even more for commercial use. It's still clever circuit design with minimal components, but without code to run on it it isn't going to get you anywhere,

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Posted by: Chelleke on April 29, 2005 at 10:45 PM

You don't need the source code to get it running! Only the HEX-file to program the PIC microcontroller is needed. That one is free to download!!
You'll want the source code only when you want to make changes to the software..

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Posted by: zantor on April 29, 2005 at 10:57 PM

This one has open source code, and is very cheap to build:

www.walrus.com/~raphael/html/mp3.html .

I've been using this thing for about two and a half years as my primary player, and it still works perfectly. I worked really hard on it, and i'm really proud of it! It's also reasonably easy to modify for automated control so... Make a screaming doll! Make a singing refrigerator!

also, look at some other good ones:
http://www.myplace.nu/mp3/
http://butterflymp3.sourceforge.net/hw.html
http://mp3elf.net/
come to think of it, there's about two dozen open source, fully functional player designs floating around. I leave it to you and your google fingers!

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