PJRC High Capacity MP3 Player Circuit Board
This project is a stand alone MP3 player, designed for home, car,
or portable use. It plays a group of MP3 files stored on a
standard or laptop IDE hard disk drive... hundreds of hours
using even today's low-cost drives. The firmware is available
under the GPL, for anyone who want to really customize the player.
High quality audio
output is provided by a 24 bit DAC, using both standard
line-level outputs and an amplified headphone output.
The large capacity allows the
use of very high MP3 quality settings, that would reduce flash based
players to only a few songs. Because it's a complete stand
alone player usable in a variety of applications, you can have
your entire MP3 music collection anywhere away from your computer.
PJRC.COM is currently offering five types of items:
Some special items are also available from third parties:
- Fully Assembled and
Tested Circuit Boards, which
provide the "guts" of a player, all that is needed is to add a
hard drive, memory SIMM, and a power source.
With an assembled board, the only electronics experience necessary
is some familiarity with connecting PC computer parts, the
IDE disk drive, a memory SIMM, and a power supply.
- Display, 24 Character by 8 Line LCD.
This large screen connects to the MP3 player's 4-pin port. An
adaptor board provides 12 pushbuttons which duplicate the functionality
of the board's buttons and also provide additional features.
- Complete Kits
and Partial Kits,
which you can build instead of
buying the board assembled. The kits require
electronic assembly experience (soldering)
with through-hole and low density surface mount electronic components.
- Short IDE Laptop Cables
and 72 Pin SIMMs (used), which are often
not available from normal computer supply vendors.
- Individual ICs. These are intended for
engineers and hobbyists
who wish to make substantial changes to the design or design their
own player from the ground up.