The Partial-Gauss is an hybrid hall-effect/mechanical split wireless keyboard.
- ZMK firmware
- Adjustable actuation point
- Rapid trigger
- SOCD
- Mouse and Gamepad emulation
- Low-profile switches
- 3D printed case
- 1kHz polling rate
- usb or ble connection to PC
- ble connection between halves
- Replaceable battery slot
- Reversible PCB layout
- Battery level measurement
- ZMK studio support
This keyboard uses Gateron low profile switches.
- The middle 6 are Gateron low profile magnetic switches.
- Only compatible with Gateron low profile magnetic jade and jade pro.
- I'm using the pros.
- The other are regular Gateron ks-33 low profiles.
- I'm using the silvers.
| Name | Part | quantity | Link |
|---|---|---|---|
| PCB | from JLCPCB | 2 | JLCPCB |
| Case/Plate/Battery cap | 3D printed | 2 | 3DP Parts |
| LP HE switches | Gateron low profile magnetic jade pro | 12 | Gateron |
| LP Mechanical switches | Gateron low profile silver | 28 | Gateron |
| HE sensor | DRV5053OAQDBZRQ1 | 12 | LCSC |
| MCU | NANO 33 BLE | 2 | AliExpress |
| MCU socket | XFCN MF254V-11-40-0743 | 2 | LCSC |
| MCU Pins | RGBW 5PIN connector | 12 | AliExpress |
| Mosfet | IRLML2402TRPBF | 4 | LCSC |
| Diodes | 1N4148W | 28 | LCSC |
| Battery | BL5C | 2 | Link doesn't exist anymore, but should be easily findable on AliExpress or Amazon. |
| Battery cable | JST PH 2.0mm male and female | 2 | AliExpress |
| Battery switch | SK12F14G5 | 2 | LCSC |
| Battery contact | GT-BTP30003-0600A-016A | 2 | LCSC |
| Black Configuration switch | SS12D10G4 | 2/4 | LCSC |
| Red Configuration switch | SS12D10L5R | 2/4 | LCSC |
| Capacitors | CL21B104KBCNNNC | 12 | LCSC |
| Switch sockets | Gateron Low Profile Switch Hot-swap 2.0 Socket | 28 | Gateron |
| 10mm M3 Screws | EDLZ-J2-M3-L10 | 8 | JLCMP |
| 6mm M3 Screws | EDLZ-J2-M3-L6 | 2 | JLCMP |
| M3 Nuts | EMLA-C2E1-BL1-M3 | 10 | JLCMP |
- The HE sensor has an higher sensitivity than needed(1000G while the switch when the sensor is on the other side of the pcb only produces ~400G)
- The Nano 33 Ble has a battery charging circuit, I assumed that it could also monitor the battery level via vddh but it can't. The PCB needs to be redesigned by freeing an adc pin and adding a voltage divider.
- The battery connector is a bit too short, so the battery needs to be placed very carefully, but it should work once it's in place.
- I'm not sure if the mosfets need a resistor on the gate, without them it seems to work fine, but I don't know if it could damage the MCU.
- The capacitors near the HE sensors are recommended by the datasheet, but I don't know if they are needed in this case, because the sensors are powered for a short time and adding a capacitor would increase the turn on time. Without them it works but it's a bit noisy.