Adafruit INA219 FeatherWing

Adafruit INA219 FeatherWing, based on the Texas Instruments INA219 Current Sensor, adds power monitoring to any Feather-based project. The INA219 FeatherWing can be used to measure both the high side voltage and DC current draw over I2C with 1% precision. This sensor can handle a high side current measuring up to 26VDC, even though it is powered with 3.3V. The INA219 FeatherWing will also report back that high side voltage, which is great for tracking battery life or solar panels.

The Adafruit INA219 FeatherWing also includes a precision amplifier that measures the voltage across the 0.1Ω, 1% sense resistor. Since the amplifier's maximum input difference is ±320mV, this means it can measure up to ±3.2A. With the internal 12-bit ADC, the resolution at ±3.2A range is 0.8mA. With the internal gain set at the minimum of div-8, the max current is ±400mA, and the resolution is 0.1mA. Advanced hackers can remove the 0.1Ω current sense resistor and replace it to change the range, for example a 0.01Ω to measure up 32A with a resolution of 8mA.


  • Dimension of 51mm x 22.8mm x 3.6mm
  • Weighs 3.4g


Publicado: 2018-01-23 | Atualizado: 2022-08-11