Mico is a small, cheap (~10 euros total) and super precise 14 bit midi controller based on the Raspberry Pi Pico board.
- 4 x detentless (smooth) encoders
- Velocity: Slow movements result in microscopic changes (1/16000 of the max range approximately), fast movements in large changes.
- A variety of "clip modes" (cycle through them by pressing the button):
- wrap (when the value goes above max, it wraps back to 0)
- clamp (clip at min and max value)
- 14 bit midi (as well as regular 7 bit midi)
- Cheap as chips and open sourced
There's a demo here.
| Quantity | Part | Mouser Number |
|---|---|---|
| 1 | Raspberry Pi Pico rpi2040 | 474-DEV-17829 |
| 8 | 0.01uF capacitor, 0603 | 80-C0603C103M5R7411 |
| 16 | 10k resistors, 1%, 0603 | 603-RC0603FR-0710KL |
| 4 | 15mm Detentless encoders | 652-PEC11R-4015K-N24(knurled) / PEC11R-4015F-N0024(flat) |
| 2 | Female header (to sandwich between the boards) | n/a |
| 2 | Male header (to sandwich between the boards) | n/a |
Download the latest firmware from the release and locate the mico.uf2 file. While plugging your Pico into your computer, press and hold the "BOOTSEL" button. It will show up as a storage device on your computer. Copy mico.uf2 to this device. Done.
If you want to build the code and mess around with it, it is recommended to use a second Pico flashed with the picoprobe firmware.
cd software
mkdir build
cd build
cmake ..
make && openocd -f interface/picoprobe.cfg -f target/rp2040.cfg -c "program mico.elf verify reset exit"Debug:
openocd -f interface/picoprobe.cfg -f target/rp2040.cfg -s tclThere is an easy to use interface for this controller here.
This work is shared under the Attribution-NonCommercial-ShareAlike 4.0 International license.
If you have questions about that, send me an email mail at madskjeldgaard.dk
These projects were a big help and inspiration in making this:
- schatzmann blog and also this post
- pico-example-midi
- encoder-pio is from the pimoroni-pico library. MIT Licensed.