I'm trying to use relay in my project . Relay shield is designed for arduino 5v I have a doubt in NC COM AND NO NC normally closed NO normally open COM common connection When I connect hot wire to COM and wire from the load light to NO . To act like a switch. When I code it acts the other way …

Relay -why it acts the other way - help needed!

system April 17, 2014, 3:13pm 9

White wire is hot line
Yellow is line to load

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