I was looking on ebay for a power supply to power both the Arduino and a 5V relay board. I came across this ( http://www.ebay.com/itm/290768591438?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 ) and ordered a few but now I am wondering if there was anything that I should be considering regarding …

Evaluating the specs on a power supply for Arduino

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