Gee whizz Rowland your really perfecting this camera cooling
nice work
Love your hand drawn diagrams
the grounding layout is very helpful for my camera.
What arduino module are you using? I don't know anything about them but they certainly look interesting and I was thinking about getting one to experiment with and hopefully gain a better understanding of how they all work. I'm hoping someday to make an electronic filter wheel.
My camera cooling is going well, getting around 35C below ambient regulated cooling, unfortunately I wrecked the sensor while removing some leftover CFA so it's out of action for a bit.
Cheers
Jo