Description

Solve power-monitoring challenges with this breakout board featuring the INA219B chip. It measures high-side voltage and DC current draw over I²C with 1% precision, eliminating the need for multiple multimeters.

Unlike low-side current meters, this chip handles high-side measurements up to +26VDC while powered by 3-5V, preventing issues with ground reference shifts. Ideal for monitoring battery life or solar panels, it measures up to ±3.2A with a 0.8mA resolution or ±400mA with 0.1mA resolution. Advanced users can replace the 0.1Ω sense resistor to extend the range (e.g., up to 32A with 8mA resolution).

The board includes a 6-pin header for breadboard use and a 3.5mm terminal plug for easy load attachment. Power the sensor with 3-5VDC, connect I²C pins to your microcontroller, and wire your target power supply to VIN+ and VIN-.

Technical Details:

• Chip: INA219B (datasheet available)
• Current Sense Resistor: 0.1Ω, 1%, 2W
• Voltage Range: Up to +26V
• Current Measurement: ±3.2A max, 0.8mA resolution
• Size: 0.9" x 0.8" PCB
• I²C Addresses: 0x40, 0x41, 0x44, 0x45 (jumper-selectable)