I looked a few links, but couldn't understand. I tried doing it using a Power Adapter from my Old Modem, (I used Adapters of 9V 1A and 12V 500mA) But It doesn't work. Neither any of the LED is glowing nor my Sketch is Starting. But it works fine when I try to power it using a USB cable and connec…

How to Power Arduino Externally ?

JimboZA December 20, 2013, 6:49am 4

Hmmm good point: one of those pics shows ac-ac, the other is dc.

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