I2CMini is tiny USB to I2C Bridge for your PC or SBC (Crowdfunding)

Last year, we wrote about Excamera Labs SPIDriver tool to control and monitor SPI devices from your computer, but this year the company launched another similar product for I2C: I2CDriver.

Both debugging tools show signals and information on a small display, but if all you want to do os to control I2C devices from your computer or isolated from an SBC, Excamera Labs has now come up with the tiny I2CMini USB to I2C bridge board.

I2CMini USB to I2C Board

I2CMini key features & specifications:

  • Fast transfer – sustained I²C transfers at 400 and 100 kHz
  • I²C pullups – programmable I²C pullup resistors, with automatic tuning
  • Dual I²C ports – a castellated 0.1″ header, plus a Qwiic standard connector
  • Jumpers – Color-coded Sparkfun Qwiic jumper included for instant connection
  • 3.3 V output: output levels are 3.3 V, all are 5 V tolerant
  • Supports all I²C features – 7- and 10-bit I²C addressing, clock stretching, bus arbitration
  • Main chips –  FTDI USB serial adapter, and Silicon Labs automotive-grade EFM8 controller
  • Host Interface – 1x micro USB 2.0 connector
  • Maximum power out current – 270 mA
  • Device current – up to 25 mA
  • Dimensions – 61 x 49 x 6 mm

I2Cmini is compatible with I2Cdriver board, and as such, it can report uptime, temperature, and run CRC of all traffic. You’ll find GUI and command-line tools written in C/C++ and Python 2/3 compatible with Windows, Mac, and Linux on Github. I2Cmini will also be open-source hardware but the hardware design files have yet to be released.

The developer explains I2CMini is particularly well-suited for applications like IoT and drones since it separates the SBC from the I2C bus.

I2CMini KitI2CMini has just launched on Crowd Supply with a symbol $1 funding target. Rewards start at $17 with the board plus a Qwicc cable, and up to $63 for I2CMini Gold – pictured above – that includes three I2Cmini board, various sensors & modules, remote controls, as well as four red carrier PCBs for the modules. Shipping is free to the US, and $12 to the rest of the world. Backers can expect their rewards to ship late January if everything goes according to plans.

Via LinuxGizmos

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4 years ago

Since there’s quite a few popular usb/i2c controllers for debug and test (ex. $30 Bus Pirate, or the Great Fet One, Digilient’s Analog Discovery 2, etc)..

I imagine this is intended for more of a production level solution.. however, there’s single chip USB/i2c solutions (ex. $2 CP2112, FT201X ) so not sure which market the I2CMini is for?

David Willmore
David Willmore
4 years ago

Or just add software to pretty much any common micro with USB and I2C. The Blue Pill comes to mind.

David Willmore
David Willmore
4 years ago

You sure you mean QUICC? https://en.wikipedia.org/wiki/QUICC

I had to dig way back into my memory to find that one.

4 years ago

CH341A can probably achieve the same way cheaper.

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