Looking for 1 inch light dependent resistor (Photoresistor?)

Thread Starter

bill5335

Joined May 25, 2013
7
I'm looking for a 1 inch light Dependent resistor. Maybe photoresistor is the more correct term. I want a 1 inch size as I want to use it as a target for a gun that shoots a red laser.

Thanks,

Bill
 

#12

Joined Nov 30, 2010
18,076
Cadmium Sulfide photocell used to be my, "go to" device, but rumor is that they are no longer in production. Besides, they are awfully slow, like, more than one second to calm down after the light source is removed.
 

Bernard

Joined Aug 7, 2008
5,262
Dough out a 1 in cell monitored with ohm meter & flashed it with laser. Flash is detectable but up close red beam covers a very small part of cell, at 50 ft. better coverage , so should work.
 
Top