
The SparkFun Qwiic Adapter can make any old I2C board or sensor a STEMMA QT / Qwiic-enabled one. This adapter breaks out the I2C pins from the JST SH connectors to pins that you can easily solder with your favorite I2C-enabled device.
I2C clock broken out from the JST SH Qwiic / STEMMA QT connectors to plated through holes; Adafruit product page states the board breaks out I2C pins and four through holes for SCL, SDA, 3.3V and GND.
I2C data broken out from the JST SH Qwiic / STEMMA QT connectors to plated through holes; same I2C bus as the two JST SH ports.
3.3 V power rail broken out from the Qwiic / STEMMA QT connector bus to a plated through hole.
Ground rail broken out from the Qwiic / STEMMA QT connector bus to a plated through hole.
I2C · 3.3 V I2C bus context from the same 3.3V breakout power rail; no separate level shifting claimed. · 3.3 V
Confirm the data interface matches your host board.
Module pins: 3.3V, GND, SCL, SDA. Schematik maps them to your board in the app.
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| Pin | Position | Type | Function | Voltage |
|---|
| SCL | signal | I2C clock broken out from the JST SH Qwiic / STEMMA QT connectors to plated through holes; Adafruit product page states the board breaks out I2C pins and four through holes for SCL, SDA, 3.3V and GND. | 3.3 V I2C bus context from the same 3.3V breakout power rail; no separate level shifting claimed. | |
| SDA | signal | I2C data broken out from the JST SH Qwiic / STEMMA QT connectors to plated through holes; same I2C bus as the two JST SH ports. | 3.3 V I2C bus context from the same 3.3V breakout power rail; no separate level shifting claimed. | |
| 3.3V | power | 3.3 V power rail broken out from the Qwiic / STEMMA QT connector bus to a plated through hole. | 3.3 V | |
| GND | ground | Ground rail broken out from the Qwiic / STEMMA QT connector bus to a plated through hole. | 0 V reference |