I am trying to create a mobile interface to the Line 6 M13 Guitar Multieffects - essentially by sending bluetooth to an arduino leonardo, and getting the leonardo to produce the midi which will change the controls on the M13.
The part where I am stuck is getting the midi from the Leonardo to the M13. I (probably naively) thought I could use a 9v battery, then use a usb midi to midi cable converter (the M-Audio Uno) to connect from the Leonardo’s micro usb connector - and then have the M-Audio’s Midi din plugs connect to the M13.
That didnt work - and my first hunch is that the microusb from the Leonardo is not powered (unlike say the usb port of a computer). (I have definitely checked that the arduino is sending the correct midi messages when it is connected to the computer.)
Therefore my questions are:
is this hunch likely to be correct (that the microusb from the leonardo, when the leonardo is powered by 9v battery does not give enough power to support whatever operations the usb to mid converter is doing)
do there exist any things to boost up power in a usb connection
what other ways of achieving this might there be?
Ideally I’d like to avoid much soldering because my eyesight is not all that good
- if so, is