8 layers115.3 × 25.3 mm
PROC091G
um-kiho/ti_radar
AWR6843AOP (Antenna-on-Package) 60GHz FMCW 레이더를 이용한 존재 감지(Presence Detection) 시스템입니다. 내장 ARM Cortex-R4F MCU + C674x DSP에서 신호 처리 및 존재 판정을 수행하고, UART로 결과를 출력합니다.
446 parts
2 layers148.9 × 97.5 mm
Pereda choc
YikeStone/pereda-kbd1Pereda is a custom wireless mechanical keyboard designed for Kailh Choc V1 switches.
- Size
- 148.9 × 97.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 51
- Nets
- 44
- Pads
- 377
- Tracks, vias
- 683, 88
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 14 Sep 2026
- Updated
- 15 Sep 2026
Overview
Pereda choc is an open-source printed circuit board by YikeStone, from the YikeStone/pereda-kbd repository on GitHub. It is a 2-layer board of 148.9 × 97.5 mm with 51 parts on 44 nets, routed with 683 tracks and 88 vias.
It is built around the 1N4148W, PCM12SMTBR and M50-3930342. It belongs with the keyboards and input boards and the nRF52 and nRF5x boards of this library.
Main components
3
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
PCM12SMTBR
SMD-40℃~+85℃ 1.4mm 10,000 cycles 300mA 4.1mm 6.7mm 6V Rectangular Columnar SMD(SMT) Tab SPDT Surface Mount, Right Angle SMD Slide Switches ROHSC&KSlide SwitchesM50-3930342
弯插,P=1.27mmPin HeadersHarwin
README
README.mdPereda
Pereda is a custom wireless mechanical keyboard designed for Kailh Choc V1 switches.
It has 46 keys, aggressive column stagger, and column splay. The key positions are designed around my finger length and natural finger-joint movement rather than a conventional keyboard layout.
Finished Product:
Hardware
- Kailh Choc V1 switches
- Seeed Studio XIAO nRF52840
- Wireless
- 46 keys
- Aggressive column stagger and column splay
- Reversible PCB
- 301230 LiPo battery, 120 mAh
- Magnetic USB-C connector for charging
- Custom ergonomic key layout
Build Details
- Top plate: 1 mm laser-cut aluminum, spray-painted black
- PCB: Black solder mask
- Keyboard height: ~1.5 cm from the table surface
- Feet: 8 × 3 mm silicone dots to prevent sliding
Assembly
After soldering the XIAO nRF52840 module to the PCB, a battery pad on the underside of the XIAO remains accessible through the cutout in the PCB.
Solder the exposed battery pad on the XIAO to the corresponding battery pad on the PCB using a short wire.
The PCB is reversible, allowing the same PCB design to be used for either side.
Firmware
Pereda uses ZMK firmware.
Manufacturing
Ready-to-manufacture files are available under:
manufacturing/v0.2/
The BOM quantities are for one PCB/half.
Repository
common/— custom symbols, footprints, and 3D modelsimages/— project imagesmanufacturing/— BOM, fabrication files, DXF, and CAD*.kicad_*— KiCad source files
Status
v0.2 — functional prototype.
Acknowledgements
Inspired by the Corne keyboard by foostan.
License
See LICENSE.
Parts
51| Qty | Value | Footprint | References |
|---|---|---|---|
| 23 | 1N4148WT | kbd:D_SOD-123-rev | D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24 +7 |
| 22 | SW_Push | kbd:Kailh_socket_PG1350_reversible_1u | rSW2, rSW3, rSW10, rSW11, rSW12, rSW13, rSW14, rSW15, rSW16, rSW17, rSW18, rSW19, rSW20, rSW21, rSW22, rSW23 +6 |
| 2 | SPDT | Button_Switch_SMD:SW_SPDT_PCM12 | rSMDSW1, SMDSW2 |
| 2 | XIAO-nRF52840-SMD | kbd:XIAO-nRF52840-SMD-kbd | rU6, U1 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | rJ2 |
| 1 | SW_Push | kbd:Kailh_socket_PG1350_reversible_1.25u | rSW1 |
Questions
How big is the Pereda choc PCB?
It measures 148.9 × 97.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pereda choc use?
51 parts, built around the 1N4148W, PCM12SMTBR and M50-3930342. 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 Pereda choc KiCad files?
From the YikeStone/pereda-kbd repository on GitHub, at the commit this page was made from: the board is pereda-choc.kicad_pcb and its schematic common/left.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pereda choc design in my own project?
Its repository states no licence, so its author keeps all rights: ask YikeStone before reusing the design.
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