I'm very new to electronics, and very interested in learning. I found this article:
http://www.susa.net/wordpress/2012/06/r ... sing-gpio/
... and decided to get the stuff from Radio Shack and yesterday after a failed attempt due to misunderstanding of the relay posts, I did get it working as intended. Yay!
Now I just want to add an LED to the circuit, to come on when the GPIO is "on". I've read that LED's kind of act like a resistor, so could I just replace the resistor in the above design with the LED? Not sure how much resistance they provide. I've ordered a couple strips of "light green" LED's, if that tells you anything.
Or maybe I just put the LED in line between the transistor and the relay?
Any help would be greatly appreciated.... thanks in advance!!