Slim Key Switches
These are footprints for the keyswitches for the MNT reform.
https://source.mntmn.com/MNT/reform/src/branch/master/reform2-keyboard-pcb/keyswitches.pretty
And the switches themselves:
https://kbdfans.com/products/kailh-low-profile-1350-choc-rgb-switch-10-pcs?variant=34418543034507
But what would I want an external keyboard to do?
It would be sort of nice to have a standalone device that I can run a python-ish style calculator app on, but that would require a significant number of keys.
Maybe something that can do some basic functionality as a standalone device, but when plugged in, could be some kind of macro hotkey style device?
Should I just prototype this with the blackberry featherwing?
Brainstorm use cases
- Timer
- Calculator
- Alarm Clock
What keys would I use for a python calculator?
- Parenthesis
- Operators
- Period
- Equals
- Letters (for variables - T9?)
- Comment (#)
- Arrows
What if:
Keys: 15x15mm
Note: Xiaomi Mi Mix 2 Dimensions: 151.8x75.5mm
4x6 keypad: 90.0x60.0mm w/ 5mm space: 120x80mm
+ - * /
7 8 9 (
4 5 6 )
1 2 3 #
= 0 . FUNC
LET ARR SPC ENT
Do a prototype with a break-away fifth column?
320x240 display: 1.333 ratio 2.6" screen: 66.04mm 40x53mm
https://www.waveshare.com/product/displays/e-paper/epaper-2/4.2inch-e-paper-module-c.htm
400x300px 103x78.5mm outline 84.8x63.6mm display
https://www.sparkfun.com/products/710
MNT Reform Notes
X spacing of keys: 18.60mm Y spacing of keys: 17.60mm
LED Notes
TC2020RGB-3CJH-TX1812Z5 - 2.1x2.1mm WS2812 knockoff?