The Arduino (fixation on the trumpet):

This part is not about the programming of the Arduino. You can find

that part here.

The Arduino is not very vulnerable. If you want to use it as is without

casing you can easily do so. We do need some form of fixation though.

In this case we use the round part of the trumpet to Vacuümform a

holder for the Arduino. The Arduino is fixed on the holder with screws.

On the backside of the holder there are two AAA rechargeable

batteries. When fully loaded the batteries deliver enough power for

about  eight hours of performance.