zmk-config

This is a ZMK config repo for my 34-36 key split keyboards, arranged in 3 rows of 5 columns with 2 or 3 thumb keys on each side. It uses three non-base layers activated through two thumb keys along with combos. It has Ctrl/Shift thumb hold-taps along with home row mods, which are also available on the left side of NAV layer. FUN layer is implemented as a tri-layer (active when both NAV and SYM are active).

OS-dependent shortcuts are present on the NAV layer, e.g. for Windows:

• Win Close: AltF4
• Tab Next: CtrlTab
• Tab Prev: CtrlShiftTab
• Tab Close: CtrlF4
• Desk Next: CtrlGuiRight
• Desk Prev: CtrlGuiLeft
• Win Next: AltTab (hold Alt while layer active), not implemented in ZMK
• Win Prev: AltShiftTab (hold Alt while layer active), not implemented in ZMK

I also use a nifty mod-morph trick: While holding Alt on the left home row, tapping the backspace thumb emits Tab for one-handed window switching. AltBackspace can still be performed with the right hand modifier.

(Visualization generated with @caksoylar/keymap)

This repo also contains shield definitions for a few keyboards using Pro Micro format daughterboards:

• choc_ergo
• hypergolic -- you should probably use the official Cradio shield instead
• ffkb v1 with an OLED, building upon sadekbaroudi's and NCKiser's definitions

See my QMK userspace for equivalent keymap definitions for QMK.