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Mysteripad Hotswap Numpad Kit


Build your very own custom hotswap numpad from scratch to match your Mysterium!

Easy to solder, uses only through-hole components.

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  • Soldering

    If you feel a bit uncomfortable soldering the USB-C socket, we're happy to do it for you.

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Mysteripad Hotswap Numpad Through-Hole Keyboard Kit

Inspired by Discipad by Bryan a.k.a. coseyfannitutti of, but created  created from scratch by 42. Keebs, Mysteripad is to Mysterium what Discipad is to Discipline.

Build your very own custom hotswap mechanical numpad from scratch!


  • Form factor matching the Mysterium keyboard
  • 17-22-key numpad layout
  • Supports 4 independent rotary encoders in the top row (each position can be either a switch or an encoder)
  • Supports split 0/00
  • Uses Kailh/Gateron hotswap sockets
  • TRRS socket for connection to the next 42. Keebs revision of the Mysterium so that a single USB cable can be used for both keyboards, similar to split boards (pending firmware support)
  • Includes a FR4 switch plate
  • Easy to solder, uses only through-hole components (no SMD)
  • The only slightly tricky part to solder is the USB-C connector. If you’re a bit unsure, I can solder it for you for a small extra
  • Lead-free tinned finish, black/white solder mask

Documentation in the GitHub repository (coming soon)

Kit includes:

  • Main PCB
  • Bottom plate made from PCB material (FR4)
  • FR4 switch plate
  • All electronic components
  • Controller flashed with USBaspLoader bootloader
  • Gateron hotswap sockets
  • Brass standoffs and screws
  • Acrylic cover

Optional add-ons:

  • EC11 rotary encoders
  • Anodised aluminium cone feet

Other parts required to finish build, not included in the kit:

  • 2-3x 2u PCB-mount stabiliser
  • 17-22x Cherry MX compatible switch
  • Keycaps
Weight 0.1 kg

Black, White


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