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You are here: MP3 Player Technical Docs Old MP3 Player Design Design Sketches |
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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 WiringThese 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 ViewIt'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 EnclosureThis is the third page, where I drew the plans for putting together the simple plastic box that holds the project. |