Eurorack Velocity Sensitive MIDI Test Keyboard
Eurorack Velocity Sensitive MIDI Test Keyboard
A single octave Eurorack size MIDI test keyboard.
Features
- Compact size
- Adjustable octave, channel, and program
- 3.5mm MIDI output
- Activity indicator
- 2" 320x240 IPS display
- 5V 100mA power
This keyboard has a RP2040 microprocessor that scans a bunch of buttons using I/O expanders. Each piano key has two soft and silent silicone buttons under it; the time difference between switch contacts is used to calculate a MIDI velocity value.
Design Documents
| Schematic Diagram | keyboard_schematic.pdf |
| PCB Gerbers | N808.zip |
| 3D Print Files | keyboard_mechanical.zip |
| Arduino Code | Arduino.zip |
| TFT_eSPI Screen Driver | Setup_Fearless_Kbd_ST7789.h |
Build Pictures
Front
Back
Button Arrangement
Crappy 3D Printed Piano Keyboard
It's okay for testing, but pretty bad as a playable piano keyboard.
Bottom of Piano Keys
