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This new design has replaced the old one.
The design shown on this page is obsolete.
The new design has more features, is flash upgradable,
is much easier to use, costs less, and is actually available if you'd
like to buy one! It's better than this old design is almost
every way. These old pages are still available, mostly for
reference.
Here you'll find my original hand-drawn notes that I used when
I put together my first MP3 player. These are a bit rough, but
I'd rather get something useful on-line now, instead of waiting
forever to do a nicer job.
Original Notes Regarding MAS3507D and DAC Wiring
These are my original notes that I used when I connected the MAS3507D
to the 8051. Pins 3 and 4 were never connected. The bottom portion
shows the notes regarding the Crystal CS4327 DAC chip. Not described
here is a little circuit built with a 74HC125 tri-state buffer chip,
which switches the 8051's serial port from the cable to the PC to
the MAS3507D chip, by using P3.4 (when low) to enable a buffer to
drive the MAS3507D. This circuit is described (somewhat) on the
page with the close-up photos of the
point-to-point wiring.
PLCC Socket Pinout, Bottom View
It's a lot easier (at least for me) to draw the PLCC pinout,
viewed from the bottom, and oriented as I view it while I'm
connecting the wires.
Notes Regarding Plastic Enclosure
This is the third page, where I drew the plans for putting together
the simple plastic box that holds the project.
Paul's Homebrew MP3 Player, Paul Stoffregen.
Designed and constructed Winter, 2000.
http://www.pjrc.com/tech/mp3/sketch.html
Last updated: November 28, 2003
Status: More info to come... just a couple photos for now.
Questions, Comments?? <paul@pjrc.com>
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