While my BCS-460 is "in the shop", I was trying to mimic StillDragon.com's DIY set up with the potentiometer and 40 amp SSR. I wired up the potentiometer to an old wall wart with 5v input and the variable output and the negative from the wall wart.
However, I was only able to turn the SSR on and off. Even though I can read voltage from zero to 5v, there was no variable control of the element.
I've seen something about wiring the potentiometer as a rheostat. Did I wire it wrong or do I need another component to cycle the element on and off in tandem with the potentiometer?
I'm hoping the BCS is back before my next brew day but want to have a backup option on hand if it ever goes out again.