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#12
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Owamanga wrote:
Kidding aside, I have a BSc in Digital Electronics and was wondering how the LEDs are used as sensors - you seem to imply that a red LED can detect red light - is this primarily because it has a red filter, (ie a clear-case red LED can't do this?), and what's so special about the white LEDs in this respect? Way back when ('87 I think..) I remember noticing in the lab that red low-power laser light will generate voltage across a bog-standard red LED. I always think there ought to be nice applications of this..given the low price of standard red leds and (now) laser pointers, you could make a cheap detector panel like you say.. -- Ken Tough |
#13
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Mark, this is a great example! Do you checkup your guestbook at
http://www.pbase.com ? Just want to write there a note... Natalia |
#14
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wrote in message oups.com... Mark, this is a great example! Do you checkup your guestbook at http://www.pbase.com ? Just want to write there a note... Natalia Thanks, and yes. |
#15
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wrote in message
ups.com... I am writing an article about "red eye" effect of people and animals. What I noticed is when you take a photo of the same animal, its eyes can have different colors on different photos or even its left and right eyes has different colors on the same photo. I think this depends on the angle at which you take a photo, rather than on tapetal color. Am I right? I never heard of it before, so it is just my assumption... Please see the photos of the animals: http://www.colorpilot.com/redeye_effect01.html all 6 pictures of a dog show actually the same dog... What do you think? Natalia Definitely reflection, check out the floor. http://www.jlkramer.net/Pictures/2517.JPG Jim |
#16
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wrote in message
ups.com... I am writing an article about "red eye" effect of people and animals. What I noticed is when you take a photo of the same animal, its eyes can have different colors on different photos or even its left and right eyes has different colors on the same photo. I think this depends on the angle at which you take a photo, rather than on tapetal color. Am I right? I never heard of it before, so it is just my assumption... Please see the photos of the animals: http://www.colorpilot.com/redeye_effect01.html all 6 pictures of a dog show actually the same dog... What do you think? Natalia Definitely reflection, check out the floor. http://www.jlkramer.net/Pictures/2517.JPG Jim |
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