If you’ve ever needed to measure the power drawn by a USB powered device, you’ll know that it’s a real pain and gets very messy very quickly. In a pinch, most people will resort to butchering the USB cable powering the device so they can measure the current consumption — breaking the power rail while trying to maintain the two data lines. This is obviously not the ideal solution and is where the USB Tester steps in to make everything better. It’s a drop-in solution that maintains your USB connection while giving you the measurements you’re after.
With it’s built-in OLED display, you can view the USB line voltage, current draw and power consumption in real-time. You can also view a graph of current consumption over the past few minutes. That in itself makes it an invaluable widget to have if you are developing a project that runs on USB power. You can also connect the USB Tester to a computer using either the provided Java App or the wiskers.io chrome app, handy for looking at data logged over a few hours.