[sdiy] Eu might be banning Vactrols and LDRs??

[Ian Fritz]

At 08:04 PM 9/10/2009, Scott Nordlund wrote:

>Solar cells are actually the same as photodiodes, only with a much
>larger junction.  Where photodiodes are usually optimized for speed,
>a solar cell will have a large junction capacitance and thus a slow
>response time.
>
>If you reverse bias it, I'd guess you could get some sort of resistor
>effect out of it.  Just remember that photocurrent goes the "wrong
>way".

Possibly, but at that point wouldn't a phototransistor (or a photoFET) be 
preferable?

Ian