Thanks Jere! ...How would I wire it up...?

Robotdoc, are you saying that my relay is fine by itself? Or is that just for what you have linked?

Technopro - No the link is for the optical isolated relay. The ones you have evidently are not power isolated.

Ok, well if I happen to buy more relays I'll go with those! Thanks Doc.

Jeremie, are you sure of the 1n4001's? I read they are forward voltage vf 1.1v.

Hi TechnoPro,

Most of the examples online use a 1N4001 or it's higher voltage cousin the 1N4007. Forward voltage doesn't really matter in this case as the diode is just being used in a flyback configuration which means that it is dissipating the energy left in the coil once the transistor stops conducting, efficient forward voltage doesn't really matter in this case.

Here's a schematic for interfacing directly to a relay from the ez-b:

While I am pretty sure that 3.3VDC will work with a 5V relay, if it doesn't then use 5V instead of 3.3V and increase the resistor to a 2.2kohm

Thanks!