stront
Split keyboard with 38 keys, LCD display and Cirque trackpad.
🏭 Extra PCBs available
I have some extras laying around, ping me on discord/reddit if interested (EU only). 💶
Features
- MX, KS-33 or Choc switches
- wired split with USB-C or TRRS interconnection
- 38 keys
- roller/rotary encoders
- LCD display (1.69" 240x280 by default)
- Cirque trackpad (40mm by default)
- 2-key pinky columns
- 3D printed cases
- VIK support - MX/KS version only
PCB has all SPI/I2C contacts exposed, so any other device can be used instead, it's just a matter of changing the case (at least that's the idea).
Photos
Choc version
MX Version
Display with PC companion app
lcd.mp4
Firmware
Companion app for Raw HID communication.
QMK
Vial
Compiled versions:
default- sample keymap with home row mods. Not recommended for longer use - create your own.hid- default keymap with HID support. Requires companion application.zzeneg- my highly customized layout.*-rect- version with rectangular display (ST7789 240x280)*-round- version with round display (GC9A01 240x240)*-flat- version with flat Cirque*-curved- version with curved Cirque*-mirror- version with trackpad on left and display on right side
Build Guide
VIK - MX/KS version only ⚠️
VIK is a standard for a data interface between printed circuit boards. It is intended to provide modularity between a mechanical keyboard PCB and additional features.
Certification card
| Category | Classification | Response |
|---|---|---|
| FPC connector | Required | ✔️ |
| Breakout pins | Recommended | ✔️ |
| Supplies: SPI | Strongly recommended | ✔️ [1] |
| Supplies: I2C | Strongly recommended | ✔️ [1] |
| I2C on main PCB | Discouraged | No |
| I2C pull ups | Informative | Optional[2] |
| Supplies: RGB | Strongly recommended | ✔️ |
| Supplies: Extra GPIO 1 | Required | Digital |
| Supplies: Extra GPIO 2 | Required | Digital |
[1]: I2C and SPI use same pins, so you can use only one or the other, not both. Selection is configured in firmware.
[2]: PCB has pads designed for 1206/3216 SMD resistors, you can solder them manually if needed.
VIK usage
Built-in display and trackpad use the same interface, so any additional VIK module will have to replace one of them. Depending on the size it can integrated into the cover or a standalone case.
All possible connectors support VIK - FPC horizontal on the back, FPC vertical on the front and the breakout pins.
Support
If you like my work and want to support my future designs, please consider sponsorship, ordering from PCBWay using my shared projects - Choc and MX/KS, or using referral link for signing up.
Sponsors
Thank you very much for your support!
