4 layers43 × 40 mm
4 layers39.3 × 29 mm
Ui to usb
betz-engineering/ui_to_usbA USB interface PCB for ui_board_1u
- Size
- 39.3 × 29 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 48
- Nets
- 42
- Pads
- 168
- Tracks, vias
- 322, 111
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Dec 2025
- Updated
- 21 Oct 2026
Overview
Ui to usb is an open-source printed circuit board by betz-engineering, from the betz-engineering/ui_to_usb repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 4-layer board of 39.3 × 29 mm with 48 parts on 42 nets, routed with 322 tracks and 111 vias.
It is built around the CH32V203K8T6, SPX3819M5-L and USBLC6-2SC6, with the TS24CA, XL-3216UGC-FB and BM12B-SRSS-TB among its other parts. Its parts include 12 capacitors, 8 resistors, 3 ICs, 3 connectors and 2 diodes. It belongs with the RISC-V boards of this library.
Main components
8
CH32V203K8T6
LQFP-32(7x7)LQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)
SPX3819M5-L
SOT-23-5SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMaxLinearVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
TS24CA
SMD,4.6x1.8mm-20℃~+70℃ 1.6N 1.9mm 12V 20 thousand cycles 3.5mm 4.7mm 50mA Black No Rectangular Button SMD(SMT) Tab SPST Surface Mount, Right Angle Without Bracket SMD,4.6x1.8mm Tactile Switches ROHSSHOU HANTactile Switches
XL-3216UGC-FB
1206-40℃~+85℃ 120° 20mA 3.4V 515nm~535nm 525nm 70mW 900mcd Discrete Diode Emerald Green Reverse Mount Water Clear 1206 LED Indication - Discrete ROHSXINGLIGHTLED Indication - Discrete
BM12B-SRSS-TB
SMD,P=1mm-25℃~+85℃ 1 12 12P 14mm 1A 1mm 1x12P 3.6mm 4.25mm 50V Auxiliary Solder Pin Copper alloy PA SH Surface Mount,Vertical Tin UL94V-0 White SMD,P=1mm Wire To Board Connector ROHSJSTWire To Board Connector
PM254-2-06-S-8.5
SMD,P=2.54mm-40℃~+105℃ 12P 2 2.54mm 2.54mm 2x6P 3A 8.5mm Copper alloy Square Hole Surface Mount,Vertical Top SMD,P=2.54mm Female Headers ROHSHCTLFemale Headers
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.mdParts
48| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 1u | Capacitor_SMD:C_0603_1608Metric | C3, C4, C5, C6, C11 |
| 4 | 10k | Resistor_SMD:R_0603_1608Metric | R5, R6, R7, R8 |
| 4 | 10u | Capacitor_SMD:C_1206_3216Metric | C1, C2, C7, C18 |
| 4 | 600R | Inductor_SMD:L_0603_1608Metric | FB1, FB2, FB3, FB4 |
| 3 | LOGO | LOGO | G***, G***, G1 |
| 2 | 20p | Capacitor_SMD:C_0603_1608Metric | C8, C9 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 2 | D2.7 | MountingHole:MountingHole_2.7mm_M2.5_ISO7380_Pad | H1, H2 |
| 2 | TS24CA | footprints:TS24CA | SW1, SW2 |
| 2 | XL-3216UGC-FB | footprints:LED_1206_3216Metric_ReverseMount_Hole2.0x1.6mm | D1, D2 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric | C10 |
| 1 | 18k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 30k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 8M | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | A10 | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | A9 | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | BM12B-SRSS-TB | Connector_JST:JST_SH_BM12B-SRSS-TB_1x12-1MP_P1.00mm_Vertical | J3 |
| 1 | CH32V203K8T6 | Package_QFP:LQFP-32_7x7mm_P0.8mm | U3 |
| 1 | G*** | kibuzzard-698F164A | kibuzzard-698F164A |
| 1 | G*** | kibuzzard-6951C425 | kibuzzard-6951C425 |
| 1 | G*** | kibuzzard-698F1642 | kibuzzard-698F1642 |
| 1 | G*** | kibuzzard-6951C42C | kibuzzard-6951C42C |
| 1 | GND | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | OSHW-Logo2_9.8x8mm_SilkScreen | Symbol:OSHW-Logo2_9.8x8mm_SilkScreen | G2 |
| 1 | PM254-2-06-S-8.5 | Connector_PinSocket_2.54mm:PinSocket_2x06_P2.54mm_Vertical_SMD | J2 |
| 1 | SPX3819M5-L | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | TYPE-C-31-M-12 | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
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Questions
How big is the Ui to usb PCB?
It measures 39.3 × 29 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Ui to usb use?
48 parts, built around the CH32V203K8T6, SPX3819M5-L, USBLC6-2SC6 and TS24CA. 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 Ui to usb KiCad files?
From the betz-engineering/ui_to_usb repository on GitHub, at the commit this page was made from: the board is ui_to_usb.kicad_pcb and its schematic ui_to_usb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ui to usb 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).