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@agis68: You are absolutely right. A simple OTG USB cable worked fine, but once I stumbled over the wire and took the music stand and the Tablet with me, I decided I want a Blue-tooth solution.Indeed an Arduino could do the job. But then you have to add a HC-04 or HC-05, a battery compartment and some method for pairing the Blue-tooth devices... like a [temporal] keyboard. Then you also have to reprogram the HC-04/05 to behave like a keyboard instead of a serial port. This certainly can be a good solution, but I didn't find a simple method to reprogram the HC-04/05.This little keyboard for $10.= contains everything I need: the battery, casing, blue-tooth, pairing method, and behaves like a keyboard. So I figured I can save me some work this way.
Sheet music page turnerView Instructable »
Sheet music page turner wit...View Instructable »