I made a bluetooth footpedal based on these instructables.com description.
Only I wanted it to have four pedals instead of just two, the good thing is that the board we both used has no problem with that and is even compatible with the Airturn since that is also using the arrow keys as keys 1 to 4.
Bluetooth page-turner pedal for sheet music apps
Of course I could have just bought the 4 pedal airturn, but it's rather big and I ended up spending about 50 euro on materials where the airturn is about 145 euro (see link below)
4 Port Airturn
I ended up putting the switches in the enclosure of a router I had lying around and this is what the end result looks like:
Materials (links to the ones I used):
From Newtone:
ONE Footswitch Latched (3,30) (To switch the pedal on/off!)
FOUR
Footswitch Momentary Soft Touch (NO) (4 * 4,60 = 18.40)
ONE Push-button black (0,31)
ONE Clip for 9 volt battery (0,19)
ONE Led 3 Millimeter Blue (0,26)
ONE Led 3 Millimeter Red(0,08)
ONE Connection for power supply 2,1 Milmeter (0,50)
TWO Resistor 1 KOhm (2* 0,05)
ONE
Set of Wires (2,85)
From Hobby Electronica:
ONE Bluefruit EZ-Key – 12 Input Bluetooth HID Keyboard Controller – v1.2 (21,95)
More info on the controllerboard:
https://learn.adafruit.com/introducing-bluefruit-ez-key-diy-bluetooth-hid-keyboard
How I have used the Pedal
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