Endevor:
When I hit the relay to switch off to on, the and vice versa, the article spoke about a build up of electricity and a sudden brief burst to my electronics, which I don't really feel like replacing if I fry. Is there a way to prevent that surge or at least reduce it to a safer level? Or does it really not matter as much?
Yes, back EMF does matter and will occur strongly in any type of coil that is switched off rapidly.... but these boards already include a diode to take care of that.