We are about to release a new MP3 player board that is smaller and less expensive than our previous model. This version will be the AP2 mp3 player and you can download the full operating manual in pdf format here. This board will play mp3 files up to 320kbps from a microSD card (not included) and will sound almost as good as an iPod. The board has a 5V trigger input and a delay feature that prevents re-triggering within a certain amount of time. The boards require a 5V supply and I don't have any of those at the moment but will by end of next week.

As usual, we don't get everything right on the first versions of the board. I have 4 boards for sale total that are not perfect but for most people will be perfectly fine. I have 2 boards at $30 and another 2 at $35. The production version will be about $50 when it is ready in a few weeks. The 5V power supply will be another $10 if you want one. Here is a photo of the board. It is roughly 2.5" square.

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If you are interested please PM me and I will give you the details on the board and the "issues" that prevent me from selling these at full price. I extend the same deal to anyone who buys a production board that if you get it and it does not do what you want then return it within 30 days and I will refund your money.