The USB Tester is inserted inline between your USB device and your power source or computer. This allows you to make sure you are getting a true 5V source and to monitor how much power your project\device is using without having to splice open a USB cable. For example, you can check which charger/cable allows your phone to charge the fastest. Or help figure out what size battery you need for that Arduino project on your workbench. The base can be used with a Digital Multi Meter or with the OLED Backpack. The backpack allows you to see the readout directly on the display without hooking up a multimeter. The default mode shows a graph of current usage, with the button cycling through the different display modes.
The OLED Backpack can connect to a computer either using the Java app or the wizkers.io Chrome app. Both can graph and log the data which can be exported as a CSV file. Wizkers is easier to setup and can handle firmware updates.
We’d like to thank Ed for all of his help and contributions. http://www.aerodynes.fr/2013/09/08/fried-circuits-tester-multiscreen-and-energy-measurement/
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