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

• Adafruit INA219 Current Sensor Guide