MagLev Switch Reference Keyboard

Summary

This keyboard is a reference keyboard for using the MagLev switch, which has linear-output Hall effect sensors and magnetic levitation switches.

Features

• A 28-switches keyboard for the left hand
• Uses 4 MagLev switches for the WASD keys
• Able to read the depth of the MagLev switches
• Built-in OLED displaying MagLev switch depth graphs

BOM

Main PCB

• Main PCB x1
• Kailh Switch Socket x24
• Cherry MX compatible switch x24
• MagLev Switch MX x4
• Stabilizer(2U) x2
• Incremental rotary encoder(PEC12R series of compatible) x1
• RP2040 x1
• Other small devices(refer to the schematic)

Flex-PCB with OLED

• Flex-PCB x1
• OLED SSD1366 x1
• Other small devices(please refer the schematic)

Shell

• Top case(3D printed) x1
• Top plate(3D printed) x1
• knob(3D printed) x1
• Bottom case(3D printed) x1
• Stand(3D printed) x2
• Rubber foot(25mmx8mm oval) x2
• Bottom switch cap(3D printed) x1
• Screw M2x5mm x4
• Screw M2x8mm x4
• Insert nut M2x3mm(OD3.5mm) x8
• Cherry MX compatible keycap x28

3D Printing

Use FFF 3D printers to print shell parts.

PCB

I had manufactured at JLCPCB. The main PCB in this repository has an LCSC number as well. This allows you to order the PCBA without selecting individual devices.

Assembly

• 1. Solder all devices.
• 2. Insert switches through a top plate.

• 3. Place the bottom switch cap onto the bottom case (Insert nuts into holes on the bottom plate if you print it by yourself.).

• 4. Fix the PCB with screws.

• 5. Insert an OLED module with a flex PCB into the top case (Insert nuts into holes on the top plate if you print it by yourself).
• 6. Connect the flex-PCB with the main PCB.

• 7. Close the top and bottom cases with screws.

• 8. Stick rubber feets.

• 9. Install keycaps and a knob.

• 10. Finish!

Directory configuration

• bin: Binary of the firmware
• pcb: Schematics & PCB artworks
  • libs: PCB libraries
  • Reference_Keyboard: Main PCB
  • SSD1366_FFC_Adapter: Flex-PCB with OLED
• shell: 3D models for FFF printer
• src: Source codes of the firmware