2 layers128.5 × 56 mm
2 layers44 × 44 mm
Koken-2026-welcome
kat0h/pcb- Size
- 44 × 44 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 17
- Pads
- 78
- Tracks, vias
- 103, 46
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 20 Aug 2024
- Updated
- 6 Apr 2026
Overview
Koken-2026-welcome is an open-source printed circuit board by kat0h, from the kat0h/pcb repository on GitHub. It is a 2-layer board of 44 × 44 mm with 23 parts on 17 nets, routed with 103 tracks and 46 vias.
It is built around the CH32V003J4M6, XC6206P332MR and WS2812B-2020, with the MSK12C02G25-B among its other parts. Its parts include 5 capacitors, 3 resistors, 2 ICs, 2 diodes and 2 switches. It belongs with the RISC-V boards of this library.
Main components
4
CH32V003J4M6
SOP-8SOP-8 Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)
XC6206P332MR
SOT-23-40℃~+85℃@(Ta) 1 1uA 200mA 3.3V 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
WS2812B-2020
SMD,2.2x2mm0.6mA 0.84mm 120us 160mcd 200mcd 2kHz 2mm 2mm 300ns 470.4nm 515.6nm 520mcd 5V 622.5nm 800Kbit/s Built-in power-on reset circuit、Built-in power-on reset circuit、Integrated intelligent reverse connection protection function Top-mount SMD,2.2x2mm RGB LEDs(Built-in IC) ROHSWorldsemiRGB LEDs(Built-In IC)
MSK12C02G25-B
SMD-7P,6.7x2.8mm-25℃~+70℃ 100mA 12V 6.6mm Black Rectangular Columnar SMD(SMT) Tab SPDT Surface Mount, Right Angle SMD-7P,6.7x2.8mm Slide Switches ROHSHanElectricitySlide Switches
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C4 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2 |
| 2 | 5.1K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | WS2812B-2020 | LED_SMD:LED_WS2812B-2020_PLCC4_2.0x2.0mm | D1, D2 |
| 1 | 0.1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C6 |
| 1 | 1.5K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
| 1 | CH32V003J4M6 | Package_SO:JEITA_SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | CR2032(MY-2032-10) | Library:MY-2032-10 | BT1 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.5mm | TP2 |
| 1 | LOGO | Library:risaju | G*** |
| 1 | LOGO | Library:risaju-cut | G*** |
| 1 | MSK12C02G25-B | Library:MSK12C02G25-B | SW2 |
| 1 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1 |
| 1 | SWIO | TestPoint:TestPoint_Pad_D1.5mm | TP3 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | VDD | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | XC6206P332MR | Package_TO_SOT_SMD:SOT-23-3 | U2 |
| 1 | kailh low profile key switch | Library:SW_Kailh_Choc_V1 | SW1 |
| 1 | ueckoken.club | QRCODE |
Questions
How big is the Koken-2026-welcome PCB?
It measures 44 × 44 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Koken-2026-welcome use?
23 parts, built around the CH32V003J4M6, XC6206P332MR, WS2812B-2020 and MSK12C02G25-B. 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 Koken-2026-welcome KiCad files?
From the kat0h/pcb repository on GitHub, at the commit this page was made from: the board is koken-2026-welcome/pcb/koken-2026-welcome.kicad_pcb and its schematic koken-2026-welcome/pcb/koken-2026-welcome.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Koken-2026-welcome design in my own project?
Its repository states no licence, so its author keeps all rights: ask kat0h before reusing the design.
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