How to use this relay shield (arduino)?
How can i use this relay shield, I have put (5v) and (GND) on the relay it turns on an LED that says power there are 4 other pins ( i assumed it just wanted a blink code so i tried that and the on board led of relay 1 turned on.
However i never heard the relay click and i could not work out how to wire it ether as it has 3 pins on the switch side.
Any help appreciated.
This is where i got it: http://www.ebay.co.uk/itm/290606600435?ssPageName=STRK:null:IT
i want to wire it so i can power a light bulb or something simple.
Thanks again! :)