Phorton1 teensyExpression caught our attention for two reasons: one, it’s gigantic, and two: (how to put this…?) it’s designed for operation by…toe. To reiterate, the large, tiered 5×5 grid is optimized for use while playing guitar seated and barefoot!

The Teensy 3.6-based system consists of a large, 3d-printed chassis, with transparent button covers, each housing addressable WS2812B RGB LEDs, plus a 3.5″ touchscreen and four rotary encoders. Around back are inputs for four traditional pedals, a 1/8″ stereo jack used for serial, a USB port for power, and a USB host port. Firmware, CAD files, and much more can be found in the project’s GitHub repo.