Our team has designed a solution to simplify the connections between a breadboard and Stemma QT or Qwiic devices.

The Adafruit Qwiic / Stemma QT Breakout Board features a JST SH-compatible connector on one end for plug-and-play compatibility with the Qwiic or Stemma QT universe. On the other side, there are four 0.1" spaced pads for soldering headers or wires. Between these two ends are two 10K pullup resistors and a green ON LED for proper wiring indication.

This versatile board can be used with both I2C controllers such as Feather, Metro, QT Py, and I2C devices like sensors, OLEDs, or GPIO expanders. It supports power and logic at 3 or 5V and has the option to deactivate the LED and pull-up resistors by cutting traces on the PCB. It's a simple yet powerful solution.