I feel like I say wtf ebs a lot lately <| sep |> Wasn ' t so much asking as showing disbelief to something I thought was impossible . Thanks for being a jerk though ! <| sep |> UNC fans are savage in here . <| sep |> You are correct . I would not be surprised if division is what they want though . <| sep |> Thinking we all like the same stuff , or really ANY stuff they saw in porn . <| sep |> Here ' s an attempt at drawing the heater idea . Hopefully this clears it up a bit , but I can try to draw more haha . I also updated the circuit diagram 92 MN 7 M 8203 CG , hopefully things look a bit better now . I ' m planning on using 2 x 10 amp fuses for safety would using a 20 amp rated switch be alright , so long as the fuses are before the switch ? The Arduino should be fine , spec sheet says their ideal Vin is 712 v , with the max being 620 v . They ' re surprisingly durablerobust devices . I ' ve been really impressed by them .