Mysterium TKL ANSI/ISO Through-Hole Keyboard Kit

Originally designed by coseyfannitutti of ctfkb.com and modified by 42. Keebs to support the ISO layout as well as ANSI.

Bryan, if you’re reading this, please get in touch! I tried e-mailing you a couple of times, I’d love to send you part of the proceeds from every sale.

This is revision 1.5e – modifications highlighted in bold below.

Build your very own custom keyboard from scratch!

• Tenkeyless (TKL) 80% layout
• Supports both ISO and ANSI layouts
• Supports optional rotary encoder in the top right position (Pause/Break)
• Supports split backspace
• Supports optional 0.91″ 128×32 pixel OLED screen
• Support for chaining keyboards via a TRRS cable using only one USB-C cable (e.g. Mysterium + Mysteripad) – firmware support coming soon
• Easy to solder, uses only through-hole components (no SMD)
• The only slightly tricky part to solder is the USB-C connector. If you feel a bit unsure, select the USB-C soldering service above
• FR4 switch plate now included
• Lead-free tinned finish, black solder mask

Documentation in the GitHub repository

Modified QMK firmware – to flash your custom keymap, modify the keymap file to your liking and flash from the command line:

• ANSI: default/keymap.c – make 42keebs/mysterium/v15d:default:flash
• ISO: iso/keymap.c – make 42keebs/mysterium/v15d:iso:flash

Kit includes:

• Main PCB
• FR4 switch plate
• FR4 bottom plate
• All electronic components
• Controller flashed with USBaspLoader bootloader
• Brass standoffs and screws
• Component acrylic cover (arrow cluster acrylic cover not compatible with plate)

Kit does not include:

• Switches, stabilizers, keycaps