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A BLE (Bluetooth Low Energy) Chorder using the Adafruit Feather 32u4 Bluefruit LE

This board has the LiPo charger and BLE transceiver built in, so all that is required is attaching the keys, an on/off switch, plugging in the battery and programming it (over a standard micro usb cable).


Here is the link to the github source:

Download the Latest BLE Build

Thanks to Charles Chen for this version!


  1. an adafruit feather 32u4 bluefruit
  2. 7 keyswitches, I suggest Cherry Red MX switches
  3. a small SPDT switch
  4. a LiPo battery with 2-pin JST-PH connector, I like 350mA, 500mA is probably overkill.
  5. something to hold your keys, see other sections of this site for case ideas. It will work with the 3d_printer_files.

The Chords

Once you grab a copy of the code you can find all the chords in the ChordMappings.h file. Change them as you see fit. They are the same as the chords I use on the spiffchorder with one set of changes - I have added a bunch of android specific chords. Media events, Volume control and the like. I will add a chart here in the not too distant future. In the mean time, the ChordMappings.h file has them.

featherchorder.1455932394.txt.gz · Last modified: 2016/02/19 20:39 by priestdo
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