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Author Topic: Phototransistors  (Read 3142 times)

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Offline hazzer123Topic starter

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Phototransistors
« on: May 30, 2007, 11:13:37 AM »
What characteristic of a phototransistor changes with light intensity? Is it resistance?

Thanks
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Offline Admin

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Re: Phototransistors
« Reply #1 on: May 30, 2007, 11:17:18 AM »
yup
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Offline hazzer123Topic starter

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Re: Phototransistors
« Reply #2 on: May 30, 2007, 11:31:58 AM »
Then whats the difference between a photoresistor and a phototransistor?
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Offline Hal9000

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Re: Phototransistors
« Reply #3 on: May 30, 2007, 11:52:25 AM »
http://en.wikipedia.org/wiki/Photocell
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.
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