I'm new to this whole thing here and I'm trying to work my way through the relay schematic in the playground (http://playground.arduino.cc/uploads/Main/relays.pdf)
I'm trying to connect my Arduino to a 12v DC relay.
There's only one part I don't get and it's the rectangle with the oblique line that looks like it's getting bypassed by the 1N4004 diode.
I have looked through picture indexes of common electrical symbols but I can't seem to find this one.
Thanks in advance.
Sorry for the newbie question.