Adafruit
Adafruit INA219 FeatherWing
The Adafruit INA219 FeatherWing is a high-side current and voltage sensor that stacks onto any Feather development board. Using the INA219B chip over I2C, it...
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The Adafruit INA219 FeatherWing is a high-side current and voltage sensor that stacks onto any Feather development board. Using the INA219B chip over I2C, it measures both DC current draw and bus voltage with 1% precision — replacing the need for two separate multimeters in your power-monitoring setup.
Unlike low-side current sensors that disrupt ground references, the INA219 measures on the high side and handles up to +26V DC, even when powered from the Feather's 3.3V rail. It's ideal for monitoring battery life, solar panel output, or any DC power system.
Key Features
- High-Side Current Sensing – Measures current without disrupting ground references, up to +26V DC
- ±3.2A Measurement Range – 0.1Ω 1% sense resistor with 0.8 mA resolution at full range
- ±400 mA Low-Range Mode – Internal gain set to ÷8 for 0.1 mA resolution
- Voltage Monitoring – Reports high-side bus voltage for battery and solar tracking
- I2C Interface – Simple two-wire connection; configurable address supports up to 4 Wings per Feather
- 12-bit ADC – Onboard analogue-to-digital converter for precise measurements
- Feather Form Factor – Stacks directly onto any Feather board
- Customisable Range – Replace the 0.1Ω sense resistor with your own (e.g., 0.01Ω for up to ±32A at 8 mA resolution)
Ideal For
- Battery life monitoring and power profiling
- Solar panel current and voltage tracking
- Embedded system power consumption analysis
- Any Feather project requiring precision DC power measurement
Package Contents
- 1× Adafruit INA219 FeatherWing
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- FeatherWing
- A FeatherWing is an add-on board made to plug into the Feather microcontroller board layout. Knowing a product is a FeatherWing helps you check whether it will physically and electrically fit your Feather-style mainboard.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
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