Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	MCU-219
Sensor Type	INA219 Current/Power Monitor
Interface	I2C (Inter-Integrated Circuit)
Measurement Range	0 to ±3.2A (with 0.1Ω shunt)
Bus Voltage Range	0 to 26V DC
Accuracy	0.5% typical calibration error
Operating Temperature	-40°C to +85°C
Supply Voltage	3.3V or 5V logic compatible
PCB Dimensions	20mm x 15mm x 3mm
Package Includes	1x Sensor Module, 1x Header Pin Set

6 reviews

Anonymous

Mar 26, 2026

Rating: 5/5

Compact and reliable

Small footprint makes it easy to fit into tight enclosures. The I2C address jumper allows me to stack multiple sensors on the same bus. Highly recommended.

Anonymous

Mar 18, 2026

Rating: 5/5

Perfect for Arduino battery projects

This module works flawlessly with my Arduino Uno. The library support is excellent, and reading both voltage and current simultaneously is very smooth. Great value for the price.

Anonymous

Mar 14, 2026

Rating: 4/5

Good accuracy, easy setup

Setup took less than 10 minutes. The readings are consistent with my multimeter. I deducted one star because the soldering pads are a bit small for beginners, but overall a solid sensor.

Anonymous

Mar 14, 2026

Rating: 5/5

Great for solar charge controller logging

Using this to log solar panel output to an SD card. The zero-drift feature ensures stable readings over long periods. Very happy with this purchase.

Anonymous

Mar 10, 2026

Rating: 5/5

Essential for power monitoring

I use this to monitor the power consumption of my rover motors. The bidirectional capability is exactly what I needed. It handles the noise from the motors well.

Anonymous

Mar 04, 2026

Rating: 4/5

Works as advertised

The data sheet is accurate, and the module performs within spec. Just make sure you calibrate the shunt resistor value in your code for maximum precision.

5 FAQ

Q: Can this module measure negative current?

A: Yes, the INA219 supports bidirectional current measurement, allowing it to detect both charging and discharging states.

Q: Do you provide a sample library for Raspberry Pi?

A: Yes, we offer a Python library specifically for Raspberry Pi which can be downloaded from the product documentation page.

Q: Is a 5V Arduino compatible with this 3.3V sensor?

A: Yes, the module includes level shifting circuitry, making it safe to connect directly to 5V microcontrollers like the Arduino Uno.

Q: What is the maximum bus voltage this can handle?

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

Q: How do I change the I2C address?

A: There are solder jumpers on the back of the PCB labeled A0 and A1. By bridging these with solder, you can select from four different addresses.

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