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Appropriate Power Supply for new FEZ board w/WiFi


I received my new FEZ w/WiFi, but I can’t seem to find info on the specs for the power connector. I see on the board that it has a positive tip and negative ring, but what voltage, amps, and barrel connector size (inner/outer dimensions) is appropriate? Or do you recommend a specific power supply for it?

Maybe this info is in the documentation pages, but I couldn’t seem to find it.



Check the schematic. After the power input there is a 5V regulator. So, the input voltage should be greater than 5V. From the schematic get the number of voltage regulator and google the datasheet for it. It will give you the maximum voltage and current of the power source.

Usually around 7V is good. The higher the voltage the greater the heat that has to be dissipated.

I suspect the maximum current will be <= 1 amp.


Great. Thank you very much.

And where would I find the measurements of the barrel connector?


I’d guess it’s a 2.1mm/5.5mm barrel-connector, since it says it’s Arduino-compatible :face_with_monocle:


Ok, thanks. I had assumed the compatibility referred to the header pinouts, and didn’t know it extended to the power connector as well.