a tiny board to celebrate the coming of 🍂 with minimal finger travel.
After spending the day at my computer, I stepped out with friends Saturday night for a burger & beverage. On the patio of our local institution, the air was cool.
Autumn had undeniably arrived.
I had been wanting to squeeze a Ferris Sweep out of a Xiao somehow and it occurred to me as I later continued working that maybe I was actually trying to make a 28 key keyboard. I reached for a leaf to lay over the keys: the maple fit nicely, conjuring memories of beurre d'érable (maple butter) in Montreal's Jean-Talon Market.
| QTY | Part | JLCPCB Part # |
|---|---|---|
| 2 | MY-LR44-03-J | C5457116 |
| 4 | 100 nF 0402 cap | C60474 |
| 2 | SSSS811101 | C109335 |
| 4 | MF254V-11-07-0743 | C2889988 |
| 6 | CESD5V0D3 | C22643 |
| 2 | 0906-2-15-20-75-14-11-0 | C5261048 |
| 8 | UMP1NTR | C510065 |
| 56 (optional) | 3305-0-15-80-47-27-10-0 | C17370797 |
| 26/28 | ChocV1 switches | N/A |
| 2 (optional) | Panasonic EVQWGD001 encoders | N/A |
| 2 | 3.7V LIR1254 (NOT LR44) | N/A |
| 2 | Xiao nRF52840 | N/A |
Fabrication & Assembly Files [zip]
JLC likes to install the 3305's upside down. Include this pic along with a note requesting they be installed thru-hole.
Choose 28 keys, or 26 keys with encoders.
Caution
Use 3.7v LIR1254 (lithium ion rechargable) battery only, being sure to not install it upside down.
It's really more of a skin. Print and place the pcb directly in it. The case is only one half, flip it in your slicer for the other half 🙃
Tip
Polymaker TPU works well. It seems to like to print slow and cool—leave the door ajar.
TPU is relatively non-slip, and it absorbs and distributes the force of typing—no bumpons necessary.
Using a variant that should probably be referred to as Befuddle, scoring a whispy 636.1 "total word effort" on cyanophage. The Y-punctuation cluster interaction is its greatest shortcoming, but it seems to be the least of all evils.
Optimized for right handed CAD—Blender, KiCad, Shapr...
Note
The combo-forward layout obscures CAGS home row mods in the graphics.
For easy customization, connect to ZMK Studio in a web-serial capable browser or with the stand alone app.
Important
Please drop a note to your local Seeed representative asking that they breakout the PDM pins (pins 0.16, 1.0, and 1.10) to pads on the underside of Xiao nRF52840. [Seeed USA] [Seeed Europe]