Music Player
Quite a few people have released the schematics and source code for their music player. Such open-source music players include:
Contents
at Open Circuits
- TRAXMOD Digital Audio Player
elsewhere
Some of these web sites are very difficult to post comments to. I suppose posting comments about these music players here -- at Open Circuits -- is the next best thing.
PIC audio player
People at the Microchip PIC forum are batting around ideas: dsPic audio player, data compression techniques, saving an audio file to a memory.
MintyMP3
MP3 player in an Altoids can. includes FM transmitter. Uses compact flash card (reads FAT16), PIC18F452, STA013 mp3 decoder chip, FT232 USB chip. "compact flash card. ... Cheaper & faster than multimedia cards (MMC) and can be accessed via a PCMCIA slot, as all PC laptops have, using a $5 adaptor (although you can read/write using the Java program MintyComm program talking through the serial port)" http://ladyada.net/make/minty/ (There's a nice forum at [FIXME: LINK] for discussing this).
"MP3 Player"
http://www.microsyl.com/mp3/mp3.html based on Atmel AVR ... The MP3 decoder is a VS1001k ... The USB interface is done via FT232MB ... ... standard hard drive with MP3s stored in FAT ... includes Infrared bi-directional interface ... includes source code in C.
Yet Another Mobile MP3 Player
http://www.bobblick.com/techref/projects/yammp3/yammp3.html "basically a personal computer that runs in a car" (runs Linux)
BookPC Car MP3 Player
http://www.bobblick.com/techref/projects/mp3book/mp3book.html "a computer I built for my car" (runs Linux)
MP3Car
"MP3Car.Com - Home of the Car Computer Forums - Build your own Carputer" http://mp3car.com/
MP3 Player
http://www.codepuppies.com/~ben/sens/pic/mp3/ (open-source hardware and software) "the MAS3507D chip, from Micronas Intermetall, ... You simply clock a serial MP3 bitstream in one side, and digital audio gets clocked out of the other side." So, we have
- Microchip PIC in the middle
- IDE interface (supports *both* hard drive *and* CD drive)
- MAS3507D chip ... to analog amplifiers ... out to headphone jack
- IR remote control.
- parallel port ... to PC, for downloading MP3s.
Stores the MP3s on the hard drive in a funky (but well documented) proprietary format, to simplify the PIC playback code.
butterfly MP3
An open design for a portable MP3 player. It is designed to be easy / possible to make for a beginner and cheap as well. An AVR Butterfly is used to simplify construction and minimise component count. The decoding is handled by a VS1001 decoder/DAC/amplifier. The design supports the original Butterfly LCD as well as NOKIA 3310 cell phone displays. The project includes PCBs in eagle format for the player and also an adapter board to replace the original LCD of the Butterfly with a BW Nokia 3310 or Color Nokia 6100 display. The player uses MMC cards with a standard FAT16 file system.
http://butterflymp3.sourceforge.net/rev05Nokia02_TN.jpg
http://butterflymp3.sourceforge.net/
yampp: Yet another MP-3 Player
CarPuter
NSLU2-based CarPuter seems to use less power than other Linux-based MP3 players. (?)
iPod ?
"Open Source Hardware" http://www.nivi.com/blog/article/open-source-hardware "The Bill of Materials for the 30 GB Video iPod from Jefferies & Company's Video iPod Teardown is fascinating." http://www.tuaw.com/2005/10/19/stock-brokers-crack-open-an-ipod-5g-so-you-dont-have-to/
discussion
Rather than commercially selling yet another MP3 player, I am more interested in commercially selling something that has almost identical hardware, but does something that none of these do. --DavidCary 15:28, 25 April 2006 (PDT)
The article "High-Tech Hearing Bypasses Ears" by Laila Weir begins: "A wristwatch phone that lets you listen by sticking a finger in your ear, an MP3 player that vibrates the bones in your skull to play music that only you can hear ..." So how does this "bone-conduction technology" work?
That article also mentions that "student ... Sam James created Soundwaves -- an underwater MP3 player".
