Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: hazzer123 on May 30, 2007, 11:13:37 AM

Title: Phototransistors
Post by: hazzer123 on May 30, 2007, 11:13:37 AM

What characteristic of a phototransistor changes with light intensity? Is it resistance?

Thanks

Title: Re: Phototransistors
Post by: Admin on May 30, 2007, 11:17:18 AM

yup

Title: Re: Phototransistors
Post by: hazzer123 on May 30, 2007, 11:31:58 AM

Then whats the difference between a photoresistor and a phototransistor?

Title: Re: Phototransistors
Post by: Hal9000 on May 30, 2007, 11:52:25 AM

http://en.wikipedia.org/wiki/Photocell (http://en.wikipedia.org/wiki/Photocell)
http://en.wikipedia.org/wiki/Photodiode (http://en.wikipedia.org/wiki/Photodiode)

Sorry, I have an exam at 9:30 tomorrow, but just thought i'd help out a tiny bit.