2 layers103 × 30.5 mm
2 layers36 × 18 mm
I2C MP USB Adapter
3devo/PCB-I2C-MP-USB-AdapterThis is a small adapter board to plug on top of the I2C-MP-USB board created by Thomas Fischl. This add-on board adds a connector for the tag-connect pinout used by 3devo on some of their boards.
- Size
- 36 × 18 mm
- Copper layers
- 2
- Thickness
- 1.58 mm
- Parts
- 9
- Nets
- 7
- Pads
- 30
- Tracks, vias
- 62, 63
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 30 Dec 2024
- Updated
- 8 Jan 2025
Overview
I2C MP USB Adapter is an open-source printed circuit board by 3devo, from the 3devo/PCB-I2C-MP-USB-Adapter repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 36 × 18 mm with 9 parts on 7 nets, routed with 62 tracks and 63 vias.
Its parts include 4 resistors and 3 connectors. It belongs with the interfaces and adapters boards of this library.
README
README.mdI2C-MP-USB-Adapter board
This is a small adapter board to plug on top of the I2C-MP-USB board created by Thomas Fischl. This add-on board adds a connector for the tag-connect pinout used by 3devo on some of their boards.
Because there was (just a little) extra room, there is also an extra connector that can be used for I²C devices in the Grove, qwIIC and STEMMA ecosystems (which all use the same pin order). The footprint has widened holes to accept both 2mm and 2.54mm pitch connectors for maximum compatibility.
The board furthermore has room for extra pullups. The I2C-MP-USB base board has pullups, but this allows adding stronger pullups and fixing the pullups to the selected VCC voltage (without relying on the switch on the base board).
Additionally, the VCC to be used can be selected by populating one of two resistors. By using a non-zero resistance here, the in-rush current can be limited (when plugging in the tag-connect while there is power on the pins).
License
Copyright 2024-2025 3devo https://www.3devo.com
This source describes Open Hardware and is licensed under the CERN-OHL-P v2 or any later version.
You may redistribute and modify this documentation and make products using it under the terms of the CERN-OHL-P v2 (https:/cern.ch/cern-ohl).
This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN-OHL-P v2 for applicable conditions
See LICENSE.txt for the full license text.
The 3devo logo is excluded from this license. Permission is granted only to use the logo on unmodified versions of this design. It must be removed from modified versions.
Parts
9| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 10Ω | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 2 | 2k2 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 1 | 3devo TC | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J2 |
| 1 | Grove | Footprints:NS-Tech_Grove_1x04_P2mm_P2.54mm_Vertical | J3 |
| 1 | LOGO | Footprints:logo_3devo_13mm | G*** |
| 1 | SolderJumper_3_Bridged12 | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP4 |
| 1 | i2c-mp-usb | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical | J1 |
Questions
How big is the I2C MP USB Adapter PCB?
It measures 36 × 18 mm and has 2 copper layers, 1.58 mm thick.
What parts does the I2C MP USB Adapter use?
9 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 I2C MP USB Adapter KiCad files?
From the 3devo/PCB-I2C-MP-USB-Adapter repository on GitHub, at the commit this page was made from: the board is PCB/I2C-MP-USB-Adapter.kicad_pcb and its schematic PCB/I2C-MP-USB-Adapter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the I2C MP USB Adapter 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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