hello, I just went to radio shack and got this relay http://www.datasheetdir.com/OMR-C-105H-V000+Discretes
it's spst, 5v...rated .5a at 125v the normal current is 20mA so i can control it with the arduino, no? i just have no idea how to make a circuit for it i just want to turn some buttons on and off on a digital photo frame. i know i probably need a diode somewhere...i don't need a transistor though, correct?
3 1----------------2 4
it's shaped like the above thing...right now i have the arduino going into pin one and i don't know what else to do...i don't know where to power the thing or ground it or anything..the data sheet doesn't give me much as you can see...i've never used a relay before so any help would be much apreciated!