A precision amplifier measures the voltage across the 0.1 ohm, 1% sense resistor. Since the amplifier maximum input difference is +/-320mV this means it can measure up to +/-3.2 Amps.
With the internal 12 bit ADC, the resolution at +/-3.2A range is 0.8mA.
With the internal gain set at the minimum of div8, the max current is +/-400mA and the resolution is 0.1mA.
The package include a 6-pin header (so you can easily attach this sensor to a breadboard) as well as a 3.5mm terminal plug so you can easily attach and detach your load. Usage is simple.
Power the sensor itself with 3 to 5VDC and connect the two I2C pins up to your Minicontroller. Then connect your target power supply to VIN+ and the load to ground to VIN-.
0.1 ohm 1% 2W current sense resistor
Up to +26V target voltage
Up to +/-3.2A current measurement, with +/-0.8mA resolution
This board ip uses I2C 7-bit addresses 0x40, 0x41, 0x44, 0x45, selectable with jumpers
1pcs INA219 Bi-direction DC Current Power Supply Breakout Sensor