I just tried out my new Adafruit USB Power Gauge Mini-Kit, and it’s fantastic.
I’m building a project for which battery life will be critical, and I needed a quick way of measuring peak power usage.
The Power Gauge is perfect. I’m using the serial interface to capture the changing power consumption over time, and it’s really easy.
One potential gotcha: on my first attempt at assembly, I managed to insert and solder one of the USB connectors upside down. Doh! So check twice, solder once :)
But so long as you use the really clear assembly instructions at adafruit’s website, you can have a working gauge in 5 minutes or so, Outstanding.