2 layers44.5 × 46.9 mm
OSO SWAT B1-jig
joeycastillo/Sensor-Watch
A board replacement for the classic Casio F-91W wristwatch
31 parts2.1k
2 layers20.3 × 51 mm
Ch32
cyao1234/c32Welp, what else than a c32 devboard? Useful for prototyping low-cost devices!
- Size
- 20.3 × 51 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 31
- Nets
- 47
- Pads
- 284
- Tracks, vias
- 374, 95
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 13 Jun 2026
- Updated
- 17 Aug 2026
Overview
Ch32 is an open-source printed circuit board by cyao1234, from the cyao1234/c32 repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 20.3 × 51 mm with 31 parts on 47 nets, routed with 374 tracks and 95 vias.
Its parts include 10 capacitors, 5 resistors, 4 connectors, 2 ICs and 2 diodes. It belongs with the RISC-V boards of this library.
README
README.mdC32 Devboard
Welp, what else than a c32 devboard? Useful for prototyping low-cost devices!
It has two usb peripherals and multiple opamps. Very useful for all kinds of small projects. Recommended to be used with ch32fun.
To use it press the boot button, tap reset and release boot!
Features:
- 2 leds
- Low cost
- Pico form
- Nothing much
- USB bootloader
- OPAMP
- 12 bit ADC
Everything is also open source, you can see it all in this repo.
The PCB uses a dual layer board in order to save costs, but still maintains a nice large ground plane.
| Thing | Cost |
|---|---|
| PCB + PCBA | $60.67 |
Parts
31| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 100nF | Capacitor_SMD:C_0402_1005Metric | C3, C4, C5, C6, C7, C9 |
| 4 | LOGO | LOGO | G***, G***, G***, G*** |
| 3 | 5.1k | Resistor_SMD:R_0402_1005Metric | R1, R5, R6 |
| 2 | 1.5k | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | 33pF | Capacitor_SMD:C_0402_1005Metric | C1, C2 |
| 2 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C10, C11 |
| 2 | Conn_01x20 | PCM_ckl-castellated-2.54mm:Castellated_1x20_P2.54mm_Vertical | J3, J4 |
| 2 | LED | LED_SMD:LED_0402_1005Metric | D1, D2 |
| 2 | SW_Push | PCM_ckl-switch:SW_Push_SPST_TSA016 | SW1, SW2 |
| 1 | 24MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | CH32V203CxTx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | Fuse | Fuse:Fuse_0805_2012Metric | F1 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23-3 | U2 |
Questions
How big is the Ch32 PCB?
It measures 20.3 × 51 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ch32 use?
31 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 Ch32 KiCad files?
From the cyao1234/c32 repository on GitHub, at the commit this page was made from: the board is hardware/ch32.kicad_pcb and its schematic hardware/ch32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ch32 design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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