Adafruit INA219 FeatherWing

The INA219 FeatherWing revolutionizes power-monitoring by streamlining measurements of high side voltage and DC current draw over I2C with 1% precision. Ideal for replacing cumbersome dual multimeter setups, this powerful tool is compatible with all Feather boards.

Seamlessly communicating over I2C, users can adjust the I2C address to connect up to four INA219 FeatherWings on a single Feather. This flexibility ensures versatile application in various projects.

Due to chip availability, the design now includes either the INA219A or INA219B, both offering exceptional consistency and accuracy, with the A version featuring a maximum current measurement error of ±1% across all temperatures.

Unlike typical low side devices, this smart chip facilitates high side current monitoring up to +26VDC, even when powered at 3.3V. It provides vital high side voltage data essential for battery life assessment or solar panel evaluation.

With its precision amplifier and a 0.1 ohm, 1% sense resistor, the INA219 can measure up to ±3.2 Amps, with fine resolutions delivered via an internal 12-bit ADC.

Advanced users can customize the range by replacing the sense resistor to measure up to 32 Amps, accommodating a broader array of applications. A user-friendly tutorial ensures hassle-free setup with Arduino or CircuitPython.