Power Pins
The sensor on the breakout requires between a 2.7V and 5.5V, and can be easily used with most microcontrollers from an Arduino to a Feather or something else.
- VIN - This is the power pin. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V micro like Arduino, use 5V, or for a Feather use 3.3V.
- GND - This is common ground for power and logic.
I2C Pins
Default address is 0x40.
- SCL - This is the I2C clock pin, connect to your microcontroller's I2C clock line. There's a 10K pullup on this pin.
- SDA - This is the I2C data pin, connect to your microcontroller's I2C data line. There's a 10K pullup on this pin.
- STEMMA QT - These connectors allow you to connect to development boards with STEMMA QT connectors, or to other things, with various associated accessories.
Other Pins
- Vin+ is the positive input pin. Connect to supply for high side current sensing or to load ground for low side sensing.
- Vin- is the negative input pin. Connect to load for high side current sensing or to board ground for low side sensing
- A0 and A1 solder jumpers - These can be bridged with solder to pull the address pin up to VIN to change the I2C address according to the list below.
I2C Addresses Based on Jumpers
- Default = 0x40
- A0 soldered = 0x41
- A1 soldered = 0x44
- A0 and A1 soldered = 0x45
