Brief

Very Simple Digital Audio player.
visit at http://www.diyaudio.com/forums/showthread.php?s=&threadid=90725.

Core Components
1. SDHC Card
2. Single 11.2896MHz clock
3. dsPIC33 MCU (has DCI serial communication controller)
4. I2S signal Output

Additional Circuits
1. control switches (+2 for V2)
2. LCD 16x2 (V2)
3. Lithium Ion Cell, and USB-B charger for portability (V2)
4. Buffering circuits (V2)

Ver.2 has 1ppm TCXO and 5V dedicated power supply.

Schematic

Schematic PDF

Firmware

Source Code

PCB

4x5 inches

Connectors on Left side : I2S(upper), and PIC programmer(lower)
Right Side USB-B connector is only for Charging. (not for Data connection)
Switch (upper) : LCD Backlight
Switch (lower) : main power
Components: dsPIC33 Micro (center, TQFP), reclocking, TCXO and 5V power, 3.3V power and Lithium Charger

On the back, 3.7V Lithium ION cell.
total 150g including 2000mAh cell.

Connected to SPDIF transmitter / DAC board.
DAC board is supplied 5V.

Summary

Very simple SDHC card audio Player.
Only one Accurate 11.2896MHz clock, and buffer circuit.
SDHC and FAT32 support. (folder depth = 1, root - each cd folder - WAV files)
44.1kHz, 16bit wav file only.
Folders and Files number: no limitation (just it goes slower)
16x2 Display, DiskNum Titile TrackNum | FileName 00:00

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