The little chip in the middle of the PCB is the actual INA260 sensor that does all the current and voltage sensing. We add all the extra components you need to get started, and 'break out' all the other pins you may want to connect to onto the PCB. For more details you can check out the schematics in the Downloads page.
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.
- Vcc - 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
- GND - common ground for power and logic
I2C Logic Pins
- SCL - I2C clock pin, connect to your microcontrollers I2C clock line. The logic level is the same as Vcc and it has a 10K pullup already on it.
- SDA - I2C data pin, connect to your microcontrollers I2C data line. The logic level is the same as Vcc. and it has a 10K pullup already on it.
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
- Alert is the interrupt output pin. You can configure the interrupt to trigger for various 'reasons' such as going over or under a configured current, voltage, or power setting. Also used to signal a one shot conversion being ready. Voltage level is the same as Vcc.
- VBus is the bus voltage. By default it is tied to Vin+ however for low side measurements you should cut the VB jumper on the right side of the breakout and connect VBus to the power bus so it can accurately calculate the bus voltage and total power (VBus * Current) draw.
- A0 and A1 solder jumpers - These can be bridged with solder to pull the address pin up to VCC to change the I2C address according to the table below
A1 |
A0 |
I2C Address (hex) |
GND |
GND |
|
GND |
VCC |
|
VCC |
GND |
|
VCC |
VCC |
|
