2 layers52 × 84 mm
2 layers52 × 21 mm
Ch32duino
avycado13/ch32duino- Size
- 52 × 21 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 47
- Pads
- 128
- Tracks, vias
- 1,133, 100
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 10 Oct 2026
- Updated
- 25 Oct 2026
Overview
Ch32duino is an open-source printed circuit board by avycado13, from the avycado13/ch32duino repository on GitHub. It is a 2-layer board of 52 × 21 mm with 13 parts on 47 nets, routed with 1,133 tracks and 100 vias.
It is built around the CH32V203C8T6, AMS1117-3.3 and SH-6X6X5H-CJ, with the TYPE-C-31-M-12 among its other parts. Its parts include 4 resistors, 4 connectors, 2 capacitors, 2 ICs and 1 switch. It belongs with the RISC-V boards of this library.
Main components
4
CH32V203C8T6
LQFP-48(7x7)144MHz 64KB FLASH Others LQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SH-6X6X5H-CJ
DIP-4P,6x6mm-25℃~+70℃ 100,000 cycles 12V 2.5N 50mA 5mm 6mm 6mm Black No PC Pin Round Button SPST Through Hole Without Bracket DIP-4P,6x6mm Tactile Switches ROHSSHOU HANTactile Switches
TYPE-C-31-M-12
SMD-30℃~+80℃ 1 10,000 cycles 16P 20V 5A 7.35mm Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSHRO ElectronicsUSB Connectors
README
README.mdCH32Duino
A Devboard made from an ultra cheap ch32v203
Features
- Arduino micro-ish pinout
- USB-C Port
- Ultra-cheap (parts < 10$)
Why?
I finished making a full scale arduino-esque board and I wanted to make another devboard. I chose to make one as cheap as I Could. I probably could have skimped even more on the usb socket and LDO, but I went with ones I knew about.
BOM
| Qty | Reference | Value | Package | Description | Price | Link |
|---|---|---|---|---|---|---|
| 1 | U1 | CH32V203C8T6 | LQFP-48 (7 × 7 mm) | Main MCU | $0.8821 | JLCPCB |
| 1 | U2 | AMS1117-3.3 | SOT-223 | LDO, +5V to +3.3V | $0.2048 | JLCPCB |
| 1 | U3 | USB-C Receptacle | SMD | USB-C Port | $0.1869 | JLCPCB |
| 2 | R1, R2 | 10K | 0805 | 10K 0805 Resistors | $0.0034 | JLCPCB |
| 2 | R3, R4 | 5.1K | 0805 | 5.1K 0805 Resistors | $0.0055 | JLCPCB |
| 2 | C1, C2 | 100nF | 0805 | 100nF 0805 Capacitors | $0.0205 | JLCPCB |
| 1 | PARTS SUBTOTAL (with minimum quantities): | $6.7640 |
Firmware
For firmware, I am using ch32fun at the moment.
Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | Analog | Connector_PinHeader_2.54mm:PinHeader_1x17_P2.54mm_Vertical | J1 |
| 1 | CH32V203CxTx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | Digital | Connector_PinHeader_2.54mm:PinHeader_1x17_P2.54mm_Vertical | J2 |
| 1 | ICSP | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J3 |
Questions
How big is the Ch32duino PCB?
It measures 52 × 21 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ch32duino use?
13 parts, built around the CH32V203C8T6, AMS1117-3.3, SH-6X6X5H-CJ and TYPE-C-31-M-12. 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 Ch32duino KiCad files?
From the avycado13/ch32duino repository on GitHub, at the commit this page was made from: the board is ch32duino.kicad_pcb and its schematic ch32duino.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ch32duino design in my own project?
Its repository states no licence, so its author keeps all rights: ask avycado13 before reusing the design.
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