When you need a reliable, cost-effective way to track power consumption and battery life, the INA219 Current Sensor Module is an industry standard. This versatile breakout board measures high-side voltage and DC current draw, calculating the total power output on the fly and delivering the data over a straightforward I2C interface.

With a 12-bit ADC and 1% maximum error over its operating temperature range, the INA219 provides excellent baseline accuracy for low-to-medium power DC circuits. It supports bus voltages up to 26V and continuous current measurement up to 3.2A using the onboard 0.1, 1% sense resistor, making it incredibly simple to integrate with microcontrollers like the ESP32 and STM32.

Perfect For:

• DC Energy Metering: An excellent, highly supported foundation for designing and prototyping custom DC energy meters.

• Power Harvesting & Battery Logging: Ideal for tracking power generation in TEG (Thermoelectric Generator) arrays or logging the charging efficiency of MPPT circuits feeding 10,000mAh battery banks.

• Low-Power Hardware Monitoring: Keep an exact eye on the power draw of embedded nodes or lightweight homelab servers to verify tight efficiency targets, like a 20W power footprint.

Technical Specifications:

• IC: Texas Instruments INA219

• Interface: I2C (Up to 4 selectable addresses via solder jumpers)

• Maximum Bus Voltage: 26V DC

• Maximum Current: 3.2A (with default 0.1 shunt resistor)

• ADC Resolution: 12-bit

• Sensing Type: High-side bi-directional current sensing

• Operating Logic Voltage: 3.0V to 5.5V