My Charybdis Mini ZMK build using nice!nano's and a PMW 3610 trackball sensor. Features auto-mouse activation with an idle time requirement prior to activation to prevent accidental mouse clicks if the trackball is touched while typing. Includes a highly specific FUN layer which contains hotkeys for two forms of MacOS screenshots and controls for the window sizing and panelling app Rectangle.
links:
- microcontroller(the brains) nicenanov2 €25 / ali clone €5
- PMW3160(trackball sensor) pmw3160 breakoutboard €21 / ali version €12 pinout ali / cheaper if high volume, €2.50 pp, €43 total
- 102050 1000mAh 3.7v lipo ali €7 for 2pcs
- (any 2pin battery connector, search "jst PH 2,0 mm" on aliexpress, they just need to fit the battery)
- slide switch for battery disconnect & on/off switch Ali, €2p/20pcs