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:

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