This I2C extender has eight 4-pin interlock connectors on board. The pinout of the connector is the same as on Arduino Sensor Shield, which is, from top to bottom, GND, VCC, SDA, and SCL. All pins with the same function are connected in parallel.
Arduino Sensor Kit - Base — Arduino Online Shop
The linear resistance to voltage module was designed for the eTape liquid level sensors. The eTape sensor plugs directly into the four-pin header on
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