2 layers272.1 × 112.3 mm
Panel
ericrlau/SP56
Bluetooth low engery keyboard. Layout based on Sofle keyboard with some modifications. NRF52840 powered. Designed around Kaihl Choc switches and spacing.
198 parts9CC-BY-SA-4.0
2 layers134.8 × 98 mm
SP56 Bottom
ericrlau/SP569Bluetooth low engery keyboard. Layout based on Sofle keyboard with some modifications. NRF52840 powered. Designed around Kaihl Choc switches and spacing.
- Size
- 134.8 × 98 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 8
- Pads
- 8
- Tracks, vias
- 0, 0
- Pours
- 2
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20210108)
- Created
- 6 Dec 2020
- Updated
- 1 Apr 2021
Overview
SP56 Bottom is an open-source printed circuit board by ericrlau, from the ericrlau/SP56 repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 134.8 × 98 mm with 8 parts on 8 nets.
It belongs with the keyboards and input boards of this library.
README
README.mdSP56
A ZMK-Powered BLE Keyboard, Inspired By Lily58 & Sofle
:warning: This is a partially tested project. Do not use to create your own copy unless you are willing to debug the hardware and/or firmware.
Flash bootloader
Bootloader is pre-loaded on assembled pcbs. If you source your own BLE module you will need to unlock the module and flash the bootloader using the Nordic nrf command line tool.
$ nrfjprog --recover --log $ nrfjprog -f nrf52 --program firmware/bootloader/COBO_nrf52840_bootloader-0.3.2-184-g64ea299_s140_6.1.1.hexUpload Firmware
- See ZMK docs for instructions on setting up ZMK and custimizing firmware.
- Default *.uf2 files are pre-loaded on assembled pcbs. If you sourced and assembled your own pcb, you can file deafult pre-built firmware here:
PCB
- Source files for pcb are in this repo. They are split into three kicad projects:
- SP56: main pcb, left and right combined.
- SP56_Bottom: Bottom cover PCB. Left and right use the same part so only one copy is created.
- SP56_Plate: Switch plate PCB. This must be 1.2mm pcb to allow Kaihl Choc V1 switches to snap in. Left and right use the same part so only one copy is created.
- NOTE: KiCad files are created with nightly KiCad 5.99 builds, they are not compatible with current stable release of KiCad 5.
- Bill of materials BOM Link
Build Guide For PCBA
Images
Prototype Build
Main PCB
FR4 Plate
Bottom PCB
Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_DIN965 | H1, H2, H3, H4, H5, H6, H7, H8 |
More from ericrlau/SP56
3- 2 layers272.1 × 98 mm
SP56
ericrlau/SP56
Bluetooth low engery keyboard. Layout based on Sofle keyboard with some modifications. NRF52840 powered. Designed around Kaihl Choc switches and spacing.
195 parts9CC-BY-SA-4.0 - 2 layers134.8 × 98 mm
SP56 Plate
ericrlau/SP56
Bluetooth low engery keyboard. Layout based on Sofle keyboard with some modifications. NRF52840 powered. Designed around Kaihl Choc switches and spacing.
38 parts9CC-BY-SA-4.0
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Questions
How big is the SP56 Bottom PCB?
It measures 134.8 × 98 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SP56 Bottom use?
8 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 SP56 Bottom KiCad files?
From the ericrlau/SP56 repository on GitHub, at the commit this page was made from: the board is PCB/SP56_Bottom/SP56_Bottom.kicad_pcb and its schematic PCB/REF_Panel/REF_Panel.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SP56 Bottom design in my own project?
Its repository publishes it under the CC-BY-SA-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).