I’ve been doing electronic music instruments for a couple years, for me and for others. They range from simple launchpads to weird ribbon guitar light synths. Here are a couple of the ones that I’ve built.
There’s also an OLED display and some buttons that allow you to change octave, transpose, MIDI channel, and switch between scales and pitch bend!
This small guy is great if you just want to have three buttons in your workflow, like play, stop and record, or if you just want to start learning how to build a MIDI controller, without having to commit to a bigger project.