Limitium' dactyl manuform

Default is great, however I didn't find a way to use it without hand rests.

This build solves the problem of missing hand rests.

Table of contents

• Limitium' dactyl manuform
  • Table of contents
• Build
  • BOM
  • Body
    • Handrest
    • Promicro holder
  • Keycaps
    • ASA profile
      • Carbon Retro Keycap Set from Akko
      • Custom KeyV2
  • Wiring
  • Firmware

Build

BOM

• ANYCUBIC 4Max Pro 2.0 FDM 3D Printer https://www.aliexpress.com/item/3256801441789044.html 186$
• ANYCUBIC Mono 4k UV Resin Printer https://www.aliexpress.com/item/3256802616795467.html 181$
• AKKO Carbon Retro keycaps AKKO Carbon Retro https://www.aliexpress.com/item/3256803365319134.html 66$
• 74 cherry mx like switches https://www.aliexpress.com/item/3256801888735506.html 48$
• 74 1N4148 diods https://www.aliexpress.com/item/2251832635934304.html 1$
• 0.3 Brass copper wire https://www.aliexpress.com/item/2251832673616354.html 1.4$
• 2 usb-c promicro controller https://www.aliexpress.com/item/3256801435571628.html 15$
• 20 M3 3mm length self tapping insert https://www.aliexpress.com/item/2251832821826942.html 1.5$
• 20 M3 flat hex screws https://www.aliexpress.com/item/2255799867108667.html 2$
• 20 silicone pads https://www.aliexpress.com/item/3256802432366448.html 3$
• 2 XH2.54 6p 90degree connector https://www.aliexpress.com/item/2251832636946873.html 2$
• 2 XH2.54 7p 90degree connector https://www.aliexpress.com/item/2251832636946873.html 2$
• 2 XH2.54 6p single head cable https://www.aliexpress.com/item/3256801288158320.html 2$
• 2 XH2.54 7p single head cable https://www.aliexpress.com/item/3256801288158320.html 2$
• 2 TRRS sockets https://www.aliexpress.com/item/2251832834540787.html 1.4$
• TRRS cable https://www.aliexpress.com/item/3256801400545299.html 2.4$
• 2 heart-shaped wrist rest https://www.aliexpress.com/item/3256801631342023.html 11$
• eSun 0.5 yellow washable resin https://www.aliexpress.com/item/3256802101772974.html 19$
• Sunlu black abs https://www.aliexpress.com/item/2255801034999072.html 18$

Body

Different body types and modifications were tried, but ended up with a carbonfet fork of Dactyl manuform with a little thumb cluster tweaking https://github.com/limitium/dactyl-manuform

Handrest

Integrated plate is made from a dactyl manuform back plate and a hand rest model

Promicro holder

The last type-c Promicro controller is slightly longer, so a new version of the holder is required.

New version is a glue-less click-in holder for TRRS jack and type-c Promicro

Keycaps

Dactyl manufrom was designed for a SA like profile for additional curvature. Any profile from the SA family can be taken.

ASA profile

SA profile is too tall for my taste, so switched to ASA.

Carbon Retro Keycap Set from Akko

It makes no sense to buy the whole set if a resin printer is available.

Custom KeyV2

The missing keycaps are printed on a resin printer and modeled via https://github.com/rsheldiii/KeyV2 project, with https://www.ffonts.net/Gorton-Digital-Regular.font font for chars and https://github.com/dakotafelder/open-gorton font for specials keys.

For the thumb cluster g20 low profile was used.

Wiring

Default QMK split wiring https://docs.qmk.fm/#/feature_split_keyboard with diods and naked wires. The rows and columns are connected to a Promicro controller with XH2.54 connectors

Firmware

QMK firmware for split keyboard

with a custom keyboard configuration and layout https://github.com/limitium/qmk_firmware/tree/master/keyboards/handwired/dactyl_lim_5x7

Handedness set by EEPROM

Layout is really basic one and far from an ideal. It's still under construction.