Adafruit USB Voltage Meter with OLED Display

This USB In-Line Voltage and Current Meter with OLED Display is akin to a skilled but unlicensed surgeon, offering precise insights into your USB port's health. It helps you diagnose voltage and current levels, ensuring optimal performance for your devices.

Specifications include an OLED display showcasing voltage, watts, amps, and mAH instantly. It incorporates a 0.025-ohm resistor for accurate current draw measurement. A convenient button allows you to rotate the display for ease of reading.

Operational from 3.7-13VDC input voltage, and accommodating up to 3A current, it is indispensable for testing chargers, cables, and phones, and invaluable when checking load levels and debugging battery chargers.

While chunkier and more numerical than some, it provides the precise data essential for serious testing and development, without being open-source. This practical tool is a key asset for ensuring optimal functionality in USB-connected devices.