4 layers47.8 × 35.1 mm
2 layers23.5 × 15.5 mm
UModbusAdapter
MandusBorjesson/uModbusAdapter- Size
- 23.5 × 15.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 33
- Pads
- 105
- Tracks, vias
- 207, 43
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 4 Sep 2024
- Updated
- 4 Sep 2024
Overview
UModbusAdapter is an open-source printed circuit board by MandusBorjesson, from the MandusBorjesson/uModbusAdapter repository on GitHub. It is a 2-layer board of 23.5 × 15.5 mm with 23 parts on 33 nets, routed with 207 tracks and 43 vias.
It is built around the CP2104EK, SP3485CN-L and USBLC6-2SC6. Its parts include 9 resistors, 4 capacitors, 3 ICs, 3 diodes and 3 connectors.
Main components
3CP2104EK
-- USB Conversion Modules ROHSSilicon LabsUSB Conversion Modules
SP3485CN-L
SOIC-80℃~+70℃ 1 1 10Mbps 3V~3.6V Transceiver SOIC-8 RS-485 / RS-422 ICs ROHSMaxLinearRS-485 / RS-422 ICs
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)
README
README.mduModbusAdapter
A tiny USB-C to RS-485 adapter with headers for both RS-485 and UART signals.
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | R_Small | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R7, R8, R9 |
| 4 | C | Capacitor_SMD:C_0603_1608Metric | C2, C3, C4, C5 |
| 2 | Conn_01x03 | Connector_JST:JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J1, J2 |
| 2 | LED | LED_SMD:LED_0805_2012Metric | D1, D2 |
| 1 | CP2104 | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U1 |
| 1 | SM712_SOT23 | Package_TO_SOT_SMD:SOT-23 | D3 |
| 1 | SP3485CN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | TestPoint | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J6 |
Questions
How big is the UModbusAdapter PCB?
It measures 23.5 × 15.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the UModbusAdapter use?
23 parts, built around the CP2104EK, SP3485CN-L and USBLC6-2SC6. 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 UModbusAdapter KiCad files?
From the MandusBorjesson/uModbusAdapter repository on GitHub, at the commit this page was made from: the board is uModbusAdapter.kicad_pcb and its schematic uModbusAdapter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the UModbusAdapter design in my own project?
Its repository states no licence, so its author keeps all rights: ask MandusBorjesson before reusing the design.
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