Editing POV display
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Unfortunately, when I go to pick LEDs out of the catalogs, they're not | Unfortunately, when I go to pick LEDs out of the catalogs, they're not | ||
rated in lumens, they're rated in candelas. | rated in lumens, they're rated in candelas. | ||
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You can use this table to get an approximate conversion from candelas to lumens. Find your LED beam width in degrees, and divide the candelas number in your specs by the cd/lm factor listed for that beam angle to get lumens. | You can use this table to get an approximate conversion from candelas to lumens. Find your LED beam width in degrees, and divide the candelas number in your specs by the cd/lm factor listed for that beam angle to get lumens. | ||
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− | + | beam angle cd/lm | |
+ | 5 167.22 | ||
+ | 10 41.82 | ||
+ | 15 18.60 | ||
+ | 20 10.48 | ||
+ | 25 6.71 | ||
+ | 30 4.67 | ||
+ | 35 3.44 | ||
+ | 40 2.64 | ||
+ | 45 2.09 | ||
Do you know what the difference is? Does your flashlight really | Do you know what the difference is? Does your flashlight really | ||
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<br> | <br> | ||
Spoke-POV and propeller clocks links: | Spoke-POV and propeller clocks links: | ||
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* An entire discussion forum devoted to POV displays http://www.ladyada.net.nyud.net:8090/forums/viewforum.php?f=11 | * An entire discussion forum devoted to POV displays http://www.ladyada.net.nyud.net:8090/forums/viewforum.php?f=11 | ||
** In particular, lots of nice pictures http://www.ladyada.net.nyud.net:8090/forums/viewtopic.php?p=4712 | ** In particular, lots of nice pictures http://www.ladyada.net.nyud.net:8090/forums/viewtopic.php?p=4712 | ||
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* micro POV display http://positron.org/projects/mpov/ small enough for "glueing it to my shaved head." | * micro POV display http://positron.org/projects/mpov/ small enough for "glueing it to my shaved head." | ||
* [http://www.rickard.gunee.com/projects/mechscan/dualpic/gamesys.php "Virtual Game System - A game console with a mechanically scanned display."] can play [http://www.rickard.gunee.com/projects/mechscan/dualpic/tetris.php Virtual Tetris] by Rickard Gunée. | * [http://www.rickard.gunee.com/projects/mechscan/dualpic/gamesys.php "Virtual Game System - A game console with a mechanically scanned display."] can play [http://www.rickard.gunee.com/projects/mechscan/dualpic/tetris.php Virtual Tetris] by Rickard Gunée. | ||
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I think so--[[User:71.234.233.163|71.234.233.163]] 18:06, 22 June 2007 (PDT) | I think so--[[User:71.234.233.163|71.234.233.163]] 18:06, 22 June 2007 (PDT) | ||
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