The ScottoT9 is a 12-key macropad based on the T9 keyboard layout. Unlike the original T9 keyboard, this one doesn't have any predictive typing features and instead relies heavily on QMK tap dance. I tried my best to put a modern twist on T9 in giving the most common punctuation and features precedence in the keymap. Once you start using it, you get surprised at just how fast you can start to type. The board is direct wired without any diodes and powered by a single RP2040 Pro Micro running QMK firmware.
Getting One
If you’re interested in getting one assembled, contact me and we can discuss the components and other details for a commissioned build. However, the files are available for free here if you want to build one yourself.
In addition to the 3D printed case, heat shink tubing, wire, and copper, you'll also need tools along with the following components:
- 1 RP2040 Pro Micro
- 4 M2x8mm standoffs
- 8 M2x5mm screws
- 12 MX switches
- 12 1u keycaps
- Optionally you can purchase or print the ScottoT9 keycaps
Wiring
The ScottoT9 is "direct wired" which means that every switch gets it's own pin on the controller and all share a common ground. Simply connect one pin from each switch to GND. Then connect the remaining switch pins to the following pins on the Arduino Pro Micro: GP22, GP26, GP27, GP21, GP23, GP20, GP6, GP5, GP4, GP9, GP8, GP7
When screwing the plate down into the case, make sure to not clip any wires as this is very easy to do if you're not careful.
Firmware
You can find the most up-to-date firmware on the ScottoKeebs Github repository. Also available are the pre-compiled firmware files that you can simply download (right click, save as) and flash by dragging and dropping to the controller.
default.uf2 - Default QMK keymap without fancy T9 stuff.
vial.uf2 - Default QMK keymap with Vial configurator support and no T9 stuff.
scotto.uf2 - The fancy T9 keymap with all the tap dance features.
The ScottoT9 features bootmagic that will allow you to hold the top left key when plugging it in to enter bootloader mode for firmware flashing.
Video
Photos
1 comment
The idea is great. I personally was waiting for something like this. This would be very useful for the makers dealing with robots, while testing them on the field. Still few things to consider (not necessary of course).
Tried to rebuild it (as it is open source project) using pi pico, but it appeared that GPIO on the arduino board you are using ,differs from the original ones,pico have. Used the precompiled code ,flashed it to pi pico,but after making connections as you described it, the results were … so so.GPIO 23 pin on pico, is internal one.Using the scottot9.if2 I was able to type some letters and numbers.Still, as I mentioned, it’s a great project ,and could be very usefull, but pi pico cost 5-6 euros,and as you stated it is more powerful than arduino eqivalents. So,could you update the compiled code to be used with pi pico,if possible.I dont mind buying another controller, most probably will purchase the whole pad, and use only part of your work, just to make the thing surve my needs. Still… rp2040 on an arduino ,is not rp 2040 on a rp pico (green)one.
Kind regards,
Y.P.