2 layers37.7 × 55 mm
2 layers38.7 × 17.8 mm
Wch link
74th/mini-wch-linke7- Size
- 38.7 × 17.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 36
- Nets
- 31
- Pads
- 118
- Tracks, vias
- 399, 67
- Pours
- 185
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 14 Mar 2023
- Updated
- 20 Sep 2023
Overview
Wch link is an open-source printed circuit board by 74th, from the 74th/mini-wch-linke repository on GitHub. It is a 2-layer board of 38.7 × 17.8 mm with 36 parts on 31 nets, routed with 399 tracks and 67 vias.
It is built around the CH32V305FBP6 and AMS1117-3.3. Its parts include 12 resistors, 7 capacitors, 2 ICs, 2 diodes and 2 connectors. It belongs with the RISC-V boards of this library.
Main components
2
CH32V305FBP6
TSSOP-20-175milTSSOP-20-175mil 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
README
README.mdMINI WCH-LinkE
WCH-LinkE Clone
- Shop Site: BOOTH
Features
- Arduino UNO R4-like SWD with UART 1.26mm 10-pin added. VCC is 3.3V.
- USB Type-C
v1.1.1
BOM
| Reference | Name | Quantity |
|---|---|---|
| C1, C3 | Capacitor 0603 22pF | 2 |
| C2, C4, C6, C7 | Capacitor 0603 10uF | 4 |
| C5 | Capacitor 0603 100nF | 1 |
| CH4 | Pin Header 2x5 Pitch 2.54mm | 1 |
| D1 | LED 0805 BLUE | 1 |
| D2 | LED 0805 RED | 1 |
| J1 | USB Type-C Receptacle - USB | 1 |
| J2 | Box Pin Header 2x5 Pitch 1.27mm | 1 |
| R1, R2, R5, R6 | Register 0603 100Ω | 4 |
| R3, R4 | Register 0603 270Ω | 2 |
| R7, R8 | Register 0603 1kΩ | 2 |
| R9, R10 | Register 0603 10kΩ | 2 |
| R11, R12 | Register 0603 5.1kΩ | 2 |
| SW1 | Button SKRPABE010 | 1 |
| U1 | Regulator 3.3V SOT-223 AMS1117-3.3 | 1 |
| U2 | MCU LQFP48 WCH CH32V305FBP6 | 1 |
| Y1 | Crystal 3225 12MHz | 1 |
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100 | $74th:Register_0603_1608 | R1, R2, R5, R6 |
| 4 | 10u | $74th:Capacitor_0603_1608 | C2, C4, C6, C7 |
| 4 | M2-Hole | $74th:M2-Hole | M1, M2, M3, M4 |
| 2 | 10k | $74th:Register_0603_1608 | R9, R10 |
| 2 | 1k | $74th:Register_0603_1608 | R7, R8 |
| 2 | 22p | $74th:Capacitor_0603_1608 | C1, C3 |
| 2 | 270 | $74th:Register_0603_1608 | R3, R4 |
| 2 | 5.1k | $74th:Register_0603_1608 | R11, R12 |
| 1 | 100n | $74th:Capacitor_0603_1608 | C5 |
| 1 | 12M | $74th:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | BLUE | $74th:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | CH32V305FBP6 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U2 |
| 1 | IAP | $74th:1Pin | CH1 |
| 1 | RED | $74th:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | RT | $74th:1Pin | CH3 |
| 1 | SWD | $74th:2Pin | CH2 |
| 1 | SWD-Debugger_Side-10Pin | $74th:BoxPinHeader_2x05_P1.27mm_Vertical | J2 |
| 1 | SW_Push | $74th:SKRPABE010 | SW1 |
| 1 | USB2.0_C_v3 | $74th:USB-C-12-Pin-SMD | J1 |
| 1 | WCH-Link-Header | $74th:Side-2x5P-PinHeader-Right | CH4 |
The 35 most common of 36 parts.
Questions
How big is the Wch link PCB?
It measures 38.7 × 17.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Wch link use?
36 parts, built around the CH32V305FBP6 and AMS1117-3.3. 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 Wch link KiCad files?
From the 74th/mini-wch-linke repository on GitHub, at the commit this page was made from: the board is wch-link.kicad_pcb and its schematic wch-link.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Wch link design in my own project?
Its repository states no licence, so its author keeps all rights: ask 74th before reusing the design.
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