Latest incarnation of the controller for my line6 M9 looper, using an arduino nano. It works perfectly, but when it’s all squeezed into the casing, the power keeps resetting now & then when I press a pedal. I’ll rebuild using a slightly wider enclosure (some mini trunking) so it has room to breath.
The dupont cables make it larger than it needs to be, but I’m reluctant to hardwire cables into the board, due to failing eyesight, mainly! They are brilliant for prototyping, but hardly secure in a box that you stomp on 😉