The VS1001 Piggyback board. (click to see larger image)
The VS1001 Piggyback board is a small development board for testing and playing around with the MP3 decoderchip VS1001
from VLSI. This chip is a complete MP3 decoder, including the DA-converter. It is also much
cheaper than the MAS/DAC combination.
The board can also be used as a decoder plugin or subunit for your own homebuilt MP3 player.
It's a small development board (33*40 mm) with a VS1001 and it's closest parts. Apart from the VS1001, it contains a crystal, a National Semiconductor LP2980 3V regulator and a 74LCV245 level converter so the board can be interfaced to 5V logic.
It has a 12 pin connector for power supply, control signals and headphone outputs.
It's using all surface mount components except for the connector and the crystal.
There is a testprogram in C-code, intended to run on a STK200 development board with an Atmel At90s8515, but can be adapted for other CPU's.
 The VS1001 Piggyback schematic. (click to see larger image)
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Partslist for VS1001 Piggyback Board : Part Value Package ------- ------- ------- R1 240k * R0805 R2 1M * R0805 R3 10k R0805 R4 470 R0805 C1 10pF * C0805 C2 33pF C0805 C3 100nF C0805 C4 100nF C0805 C5 100nF C0805 C6 10uF/16V B55_4.5x5.3 C7 10uF/16V B55_4.5x5.3 C8 100uF/6V B55_6.3x5.3 C9 100uF/6V B55_6.3x5.3 L1 10uH L3225P D1 EL17-21 LED0805 IC1 VS1001K SOIC-28 IC2 74LVC245AD SO20L IC3 LP2980 M5 Q1 12.288 MHz HC49UP * see schematic for alternative components |
Download EAGLE data files (schematic, layout)
Download C-code for testprogram
You can order the PCB for this project at the yampp Web Shop.