I just built my first homemade bator following MissPrissy's guidelines. I FINALLY found a thermostat! YIPPEEEE! Anyway, the transformer I have says: I/P 120V AC O/P 12V AC All the posts I've read say that you need a DC output. I wired this transformer to my pc fan, and it's working great. But it does seem a little strong. Is that where the DC part comes in? Will this completely mess up everything?