Koepckeae
ssbb·koepckeae·pcb/choc/koepckeae.kicad_pcb
About the Koepckeae PCB
Koepckeae is an open source PCB design by ssbb, published on GitHub under the MIT license. It is a 2-layer board measuring 239.8 × 115.2 mm, with 40 components from 7 distinct parts.
Other key parts include the 74HC595. By type, the board carries 34 relays, 3 connectors, 2 switches and 1 IC.
It belongs with the keyboards designs in this gallery.
From the project
34 key unibody split with splay and spaced out thumbs
koepckeae is a 34-key unibody split keyboard higihly inspired by Pete Johanson's Zaphod Lite, featuring hotswap support, splay, and spaced out thumbs.
Max battery dimensions are 29mm x 21mm x 8mm. Ideally get a battery with JST connector but double check polarity on PCB.

Main components on the Koepckeae
Koepckeae bill of materials (BOM)
40 components, 7 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HC595 | SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | Conn_01x09_Socket | Adafruit_Sharp_Memory_Display_1.3in | J1 |
| 1 | Conn_01x02_Socket | PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | Conn_01x02_Socket | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J3 |
| 34 | PG1350 | SW_choc_v1_HS_1u | K1, K2, K3, K4, K5, K6, K7, K8 +26 |
| 1 | SW_Push | Panasonic_EVQPUL_EVQPUC | SW1 |
| 1 | SW_SPDT | SW_SPDT_PCM12 | SW2 |
Koepckeae design files
The KiCad project lives in the ssbb/koepckeae repository on GitHub; these links point at the commit this page was built from.
- Layoutpcb/choc/koepckeae.kicad_pcb
- Schematicpcb/choc/koepckeae.kicad_sch
Koepckeae: common questions
How big is the Koepckeae PCB?
The Koepckeae measures 239.8 × 115.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Koepckeae?
40 components, from 7 distinct parts. The full bill of materials is listed on this page.
Where can I download the Koepckeae design files?
From the ssbb/koepckeae repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Koepckeae design in my own project?
Yes, under the terms of its MIT license, which ssbb chose for the repository.