/diy/ - Do It Yourself

>>1145097
>It is well-known that the resistance of a light-dependent resistor (LDR) varies exponentially
This depends on the LDR type, but generally not very and the parameters or curves shown in the datasheets aren't that accurate either.
Why not use a photodiode and a logarithmic amplifier? There are plenty of schematics available for such circuits, some with excellent performance over huge range.

One such circuit: http://www.linear.com/solutions/1598