Logical pinout · physical placement not verified

VIN
Board power input. Source states to power the board with the same voltage as the microcontroller logic level, for example 5V on Arduino or 3.3V on Feather.
Type · PowerVoltage · 2.7V to 5.5V board supply, use same logic level as host
GND
Common ground for board power and logic.
Type · GroundVoltage · 0V
SCL
I2C clock line. Source states a 10K pull-up is present on this pin.
Type · I2CVoltage · logic-level I2C, tied to host logic level via board power
SDA
I2C data line. Source states a 10K pull-up is present on this pin.
Type · I2CVoltage · logic-level I2C, tied to host logic level via board power
STEMMA QT
STEMMA QT connector for I2C connection to compatible development boards or accessories.
Type · UnknownVoltage · logic-level I2C, tied to board power
Vin+
Positive input for current sensing. Source says connect to supply for high-side sensing, or load ground for low-side sensing.
Type · UnknownVoltage · up to +26VDC high-side measurement per product page
Vin-
Negative input for current sensing. Source says connect to load for high-side sensing, or board ground for low-side sensing.
Type · UnknownVoltage · measurement input paired with Vin+
A0 solder jumper
I2C address select jumper. Source states soldering A0 changes the default address from 0x40 to 0x41, or with A1 to 0x45.
Type · ControlVoltage · pulls address pin up to VIN when bridged
A1 solder jumper
I2C address select jumper. Source states soldering A1 changes the default address from 0x40 to 0x44, or with A0 to 0x45.
Type · ControlVoltage · pulls address pin up to VIN when bridged

Pin	Type	Function	Voltage
VIN	Power	Board power input. Source states to power the board with the same voltage as the microcontroller logic level, for example 5V on Arduino or 3.3V on Feather.	2.7V to 5.5V board supply, use same logic level as host
GND	Ground	Common ground for board power and logic.	0V
SCL	I2C	I2C clock line. Source states a 10K pull-up is present on this pin.	logic-level I2C, tied to host logic level via board power
SDA	I2C	I2C data line. Source states a 10K pull-up is present on this pin.	logic-level I2C, tied to host logic level via board power
STEMMA QT	Unknown	STEMMA QT connector for I2C connection to compatible development boards or accessories.	logic-level I2C, tied to board power
Vin+	Unknown	Positive input for current sensing. Source says connect to supply for high-side sensing, or load ground for low-side sensing.	up to +26VDC high-side measurement per product page
Vin-	Unknown	Negative input for current sensing. Source says connect to load for high-side sensing, or board ground for low-side sensing.	measurement input paired with Vin+
A0 solder jumper	Control	I2C address select jumper. Source states soldering A0 changes the default address from 0x40 to 0x41, or with A1 to 0x45.	pulls address pin up to VIN when bridged
A1 solder jumper	Control	I2C address select jumper. Source states soldering A1 changes the default address from 0x40 to 0x44, or with A0 to 0x45.	pulls address pin up to VIN when bridged

Logical pinout · physical placement not verified

Pin details

9 connections

VIN
Board power input. Source states to power the board with the same voltage as the microcontroller logic level, for example 5V on Arduino or 3.3V on Feather.
PowerVoltage · 2.7V to 5.5V board supply, use same logic level as host
GND
Common ground for board power and logic.
GroundVoltage · 0V
SCL
I2C clock line. Source states a 10K pull-up is present on this pin.
I2CVoltage · logic-level I2C, tied to host logic level via board power
SDA
I2C data line. Source states a 10K pull-up is present on this pin.
I2CVoltage · logic-level I2C, tied to host logic level via board power
STEMMA QT
STEMMA QT connector for I2C connection to compatible development boards or accessories.
UnknownVoltage · logic-level I2C, tied to board power
Vin+
Positive input for current sensing. Source says connect to supply for high-side sensing, or load ground for low-side sensing.
UnknownVoltage · up to +26VDC high-side measurement per product page
Vin-
Negative input for current sensing. Source says connect to load for high-side sensing, or board ground for low-side sensing.
UnknownVoltage · measurement input paired with Vin+
A0 solder jumper
I2C address select jumper. Source states soldering A0 changes the default address from 0x40 to 0x41, or with A1 to 0x45.
ControlVoltage · pulls address pin up to VIN when bridged
A1 solder jumper
I2C address select jumper. Source states soldering A1 changes the default address from 0x40 to 0x44, or with A0 to 0x45.
ControlVoltage · pulls address pin up to VIN when bridged

Start wiring

I2C · Analog · 3.3 – 5 V · Breakout

Confirm the data interface matches your host board.

Module pins: VIN, GND, SCL, SDA. Schematik maps them to your board in the app.

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Pinout