New Guide! MIDI Controller with LED Arcade Buttons and Raspberry Pi Pico by @ecken @BlitzCityDIY

Learn Guide: MIDI Controller with LED Arcade Buttons and Raspberry Pi Pico

DIY MIDI Controller

Build your own CircuitPython powered MIDI controller! This “MIDI fighter”-like controller features 16 arcade buttons with built-in LEDs, an OLED screen and joystick. Play drums, synthesizers or anything MIDI related! All of the electronics are housed in a snap-fit 3D printed case.

Buttons and LEDs

The Raspberry Pi Pico has plenty of GPIO for connecting 4×4 buttons. The AW9525 GPIO expander / LED driver powers the LEDs and connects to the Raspberry Pi Pico over I2C.

The LEDs light up when the buttons are pressed and stay lit until released. Awesome!

Edit MIDI on the Fly

This MIDI controller’s special sauce is the ability to change and save MIDI notes directly on the device. This allows quick MIDI notes remapping. Perfect for crafting your own kits and setups for performances.

Intuitive UI/UX

The OLED screen shows the 16 buttons as little circles with numbers. The numbers are the MIDI notes assigned to each button. Use the joystick to select a button and edit the MIDI note. In edit mode, the button will blink the LED, letting you know it’s been activated. While in edit mode, the buttons can be pressed to compare MIDI notes.

Kickstand Handle

Lunchbox vibes? Yes! The handle is 3d printed, print-in-place, with no support material. Can you handle it? It also works great as a kickstand to prop up the case.

Code by Liz Clark @BlitzCityDIY

Raspberry Pi Pico

AW9523 GPIO Expander and LED Driver

1.5in OLED grayscale

Arcade Button with LED – 30mm

5-way navigation switch

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