I'm very new to Arduino, but I'd like to think I learn quickly.
I apologize if this question has been answered 1000's of times in different ways. But I still have questions about controlling relays through the Arduino UNO.
Below is the kind of relay I'd like to buy: http://iteadstudio.com/store/index.php?main_page=product_info&products_id=430.
The VCC, CH1, CH2, CH3, CH4, and GND connectors seem pretty straight forward.
VCC = 5v on the Arduino, GND = GND on Arduino, and CH1-4 = any digital connection on Arduino.
But I have no idea what to connect to the NO, "/", and NC connections on the relay board...
Below is a picture from a Sparkfun Tutorial: Controllable Power Outlet - SparkFun Electronics. Which is based off of this product: Relay Control PCB - COM-09096 - SparkFun Electronics
The image above shows a single relay. The black cable is spit, going first into "Normally Open" and then out of "LOAD" spots on the board.
I'm going to guess that "Normally Open" = NO on the relay board I want to buy.
Could someone please explain how I would connect the Green, White, and Black cables in this example to the 4-channel relay board I would like to get?
Can anyone tell if I need to add a Transistor, Diode or any other components to a relay board like the one I want to buy?
EDIT: May have answered my own question... NO=Normally Open, NC=Normally Closed, and the "/" is Common? I guess the Sparkfun explample did not have a Normally Closed option. I think this is enough info to go ahead and buy the board, but does anyone know if I need a transistor or diode?