www.picaxe.com/products/axe171
AXE171 PICAXE-14 Audio Kit © Revolution Education Ltd 2015 v1.1
May be copied for educational use.
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3.2 Testing the MP3 files (using the on-board switches).
1.
Make sure the microSD card containing MP3 files has been inserted into the MP3 player.
2.
Connect power (4.5V battery box) to the AXE171 battery clip.
3.
Press the left play (>) switch, the first tune found will then play.
4.
A short press of the centre (>> / +) switch will move to the next track.
5.
A short press of the right (<< / -) switch will move to the previous track.
6.
A long press of the centre (>> / +) switch will increase the volume.
7.
A long press of the right (<< / -) switch will decrease the volume.
Note that, as with most MP3 players, the next/previous track push buttons operate on the FAT file
system sort, not the alphabetical filename sort. So the next/previous track played will be according to
the order that the files were originally saved onto the card,
not
via an alphabetical sort of the
filenames currently on the card. Use a search engine search as Google to find a ‘FAT filename sorter’
utility program if the push switch playback order is essential and must be amended.
When playback is controlled by serial commands from a PICAXE chip the files are called directly by
filename number, so the sort order on the microSD card is then not important.