USB MIDI footswitch for Axe-FX

Here’s a fun project I started about two months ago, and finished this weekend. It’s a DMC Ground Control (GC), modified with Teensy++2.0 controller, which turns it into a powerful USB expander footswitch for use with my Axe-FX Ultra and MFC-101.

Here’s a short video showing the various features:

Here are a few additional pictures. The Teensy is secured to the GC mainboard by a single row of pins. Hope I never have to replace the Teensy++, it would be very difficult to de-solder.

The multiplexed LED display had over 200 LED segments to drive (arranged 12 ‘chars’ x 18 ‘segs’). Here’s my bench setup while debugging the character strobe sequence.


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