I built a solar tracker using a circuit I found on the web that does not work very well in my opinion.
It is late, but I think that circuit has some issues.
So it not working so great is not your fault.
LDRs are, in my experience, not very predicatable.
They vary so much from piece to piece, and so "un-linearly" (combine the 2 to see what I mean about them being not good), that I will not even attempt to use 2 of them as a voltage divider ever again.
Might try adding a resistor paralleled with each LDR.
The resistors value I would try 1st would be about 65% of the difference between the LDR's low and high resistance, but that would be with the types of LDRs I would be working with.
However, I do NOT know what the LDR values or percentages are, and they vary widely.
Meaning do not blame it on me if it blows up!
Part of the problem may be simply the wrong LDRs.
LDR specs vary greatly in the areas that count the most for a circuit like a tracker.
The specs don't matter so much in a circuit that only decides if it is daylight or not.
G-
