I've finally got a fridge to hook up to the brewpi, a 14.5 cuft chest freezer. I scavanged all my electronics from other projects, sous vide and a bbq temp controller. I only had one dallas one-wire temp probe, I have more on order but delivery is pretty far out (I'm having trouble with the seller).
So I figured I could at least do "Fridge Constant Control" and still use the fermentation chamber until the new sensors are delivered.
I wired it up last night and ran through the night for testing. With all default controller settings I'm getting about a 6 degree F temp swing over about 45 minute cycles. Is this about normal, or should I tune my setting? Will these chamber temp swings be fine on a fermenting batch of beer?
I was thinking that I would just set my fridge setpoint to the bottom of the yeast's temp range + 6 or so, or maybe even lower for the first few days of fermentation. Thoughts?