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Home / Computer Hardware, Monitors & Peripherals / INA219 I2C Interface Zero-Drift Bidirectional Current/Power Monitor Sensor Module

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Interface Type I²C / SMBus
Supply Voltage 3.3V or 5V DC
Bus Voltage Range 0V to 26V
Current Sensing Range ±3.2A (Default Shunt)
Shunt Resistor Value 0.1 Ohm 1%
Measurement Accuracy 0.5% Typical
Operating Temperature -40°C to +85°C
PCB Dimensions 25 x 20 mm
Module Weight 5 grams
Microcontroller Compatibility Arduino, Raspberry Pi, ESP32

5 reviews

A

Anonymous

Apr 12, 2026

Rating: 5/5

Reliable module

Been running this continuously for weeks monitoring a 12V system. No drift or issues so far.

A

Anonymous

Feb 27, 2026

Rating: 5/5

Precise measurements

Compared the output against my multimeter and it was spot on. Excellent value for the price.

A

Anonymous

Jan 28, 2026

Rating: 5/5

Library works well

The Adafruit library supports this module perfectly. Got it up and running in minutes.

A

Anonymous

Jan 22, 2026

Rating: 4/5

Good but small pins

Works well but the header pins are close together. Make sure you have a steady hand for soldering.

A

Anonymous

Jan 19, 2026

Rating: 5/5

Great for power logging

Used this for a solar battery project. The readings are consistent and the I2C interface makes wiring very simple.

5 FAQ

Q: Do I need to install a specific library?

A: While you can write your own driver, we recommend using the Adafruit INA219 library for ease of use.

Q: What is the maximum bus voltage?

A: The maximum bus voltage rating is 26V. Do not exceed this limit to avoid damaging the sensor.

Q: Is this compatible with 5V Arduino boards?

A: Yes, the module supports 3.3V and 5V logic levels, so it works perfectly with standard Arduino boards.

Q: How do I change the I2C address?

A: You can change the address by soldering the address selection jumpers on the back of the PCB.

Q: Can this measure AC current?

A: No, the INA219 is designed for DC current and power monitoring only.

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