I will be using a hydraulic scheme.
G'day Watt.
Ages ago I saw a hydraulic PV tracker setup that didn't need ANY brains to operate, the guy simply put a tube by the panels and when the sun heated that said pipe the oil heated and expanded and thus moving the cylinder causing the tracker to move. As far as parking goes at night the oil cools down and the unit automatically parks.
Simple design but one can see many slabs of beer to get one going......
Cheers Bryan
They are not exactly great.
At least one major retailer in the US stopped selling them, and refused to accept returns purchased from ther retailers.
(who accepts returns of items from other retailers?)
Here, the temp has almost nothing to do with where the sun is, ever.
I am just saying a temp based system wouldn't work in this area.
Co/Amanda had the right idea, if/when combined with a slow tracker or time delay.
I have my own related circuits/sketches somewhere, if I can find them.
Simple stuff.
G-