2 layers65 × 56 mm
2 layers109 × 86.8 mm
Datum
hermatician/datumA 34-key wireless split keyboard. Fixed, trusted, everything measured from here.
- Size
- 109 × 86.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 24
- Pads
- 404
- Tracks, vias
- 295, 14
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 9 Jun 2026
- Updated
- 3 Oct 2026
Overview
Datum is an open-source printed circuit board by hermatician, from the hermatician/datum repository on GitHub. It is a 2-layer board of 109 × 86.8 mm with 23 parts on 24 nets, routed with 295 tracks and 14 vias.
Its parts include 17 switches and 1 IC. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) and nRF52 and nRF5x boards of this library.
README
pcb/README.mdSweep Half Swept
| Front | Back |
|---|---|
 |  |
Half of a Sweep2 with a reversible micro-controller footprint.
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | SW_Push | * duckyb-collection:SW_PG1350_rev_DPB | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17 +1 |
| 2 | MountingHole_Pad | kbd:1pin_conn | B-, B+ |
| 1 | ProMicro-kbd | * duckyb-collection:ProMicro_jumpers_facedown | U1 |
| 1 | SW_Push | * duckyb-collection:Tactile-Switch_SMT | RSW2 |
| 1 | SW_SPDT | Kailh:SPDT_C128955 | POWER SW |
The 22 most common of 23 parts.
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23 parts258
Questions
How big is the Datum PCB?
It measures 109 × 86.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Datum use?
23 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Datum KiCad files?
From the hermatician/datum repository on GitHub, at the commit this page was made from: the board is pcb/datum.kicad_pcb and its schematic pcb/datum.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Datum design in my own project?
Its repository states no licence, so its author keeps all rights: ask hermatician before reusing the design.