Phototransistors and Photoresistor

[airman00]

Phototransistors and photoresistors can both detect light , correct? Meaning can I substitute a phototransistor for a photoresistor to detect the light from a flashlight?
Thanks,
Eric

[ed1380]

http://www.techimo.com/forum/showthread.php?t=32866

first link in google. you can make a phototransistor from a photoresistor and a regular transistor. both very close to being the same.

a photoresistor changes resistance so you'd need to compare it with something to see if it senses light. a phototransistors output is based on the light. also need a compare. just use what you have laying around or what cheaper 

[airman00]

thanks ed

i'll play around with them now