hackpad/hackpads/segfaultpad

SegfaultPad

This is a random macropad I designed. It has controls for media, coding, and arrow keys, because I am currently using a 60 percent keyboard. The firmware is coded with KMK in Python because I was a little rushed, but I am planning on rewriting it in Rust from scratch soon. It is 4x4, and has no LEDs or stuff that could be distracting. I was inspired by some of the older, 80s design, and I probably had the most difficulties with the CAD modeling, as FreeCAD kept crashing and erroring.

CAD

This is a screenshot of how it all fits together. I couldn't find good ways of positioning models, so it does not have the MCU or keyswitch + keycap models in it. All CAD models can be found in the cad/ directory. The CAD models were originally designed with FreeCAD (not something I want to repeat) and tweaked with PrusaSlicer, but were remodeled in Fusion 360. I included the FreeCAD documents as well because the final result does contain some meshes, and so I wanted it to be more accessible.

PCB

The PCB was designed entirely in KiCAD. Files can be found in the pcb/ directory. I used the OPL KiCAD library, and the ScottoKeebs KiCAD library. You can put both of these folders into the libraries/ directory.

This is my schematic:

This is my PCB:

And here is a render of the board without any components:

BOM

This is my Bill Of Materials, and should be everything necessary to build my macropad.

• Cherry MX Blue Keyswitches (x16, greens if blue is not possible)
• PCB (x1)
• XIAO Seeed RP2040 (x1)
• Through-hole diodes (x16)
• Blank DSA Keycaps (x16)
• Same bolts as the OrpheusPad (M3 I think?) and fitting nuts (4x of each)