|
|
Line 1: |
Line 1: |
− | [http://people.msoe.edu/~millerni/forums.php?show=topic&id=114&forum=13 meridia online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=157&forum=13 wwe ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=128&forum=13 phentermine online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=158&forum=13 xanax online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=106&forum=13 cheap hydrocodone] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=160&forum=13 cheap zanaflex] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=102&forum=13 free free ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=97&forum=13 buy didrex] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=135&forum=13 real ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=100&forum=13 buy fioricet] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=96&forum=13 buy diazepam] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=136&forum=13 rivotril online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=87&forum=13 cheap ativan] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=144&forum=13 sonyericsson ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=137&forum=13 free sagem ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=152&forum=13 verizon ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=139&forum=13 sharp ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=125&forum=13 ortho online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=156&forum=13 wellbutrin online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=151&forum=13 valium] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=121&forum=13 cheap nexium] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=147&forum=13 free tracfone ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=142&forum=13 free sony ericsson ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=94&forum=13 cool ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=161&forum=13 but zoloft] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=117&forum=13 free motorola ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=133&forum=13 qwest ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=138&forum=13 samsung ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=122&forum=13 free nextel ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=89&forum=13 celexa online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=99&forum=13 free ericsson ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=115&forum=13 free midi ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=146&forum=13 cheap tenuate] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=109&forum=13 cheap levitra] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=82&forum=13 adipex online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=132&forum=13 free punk ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=130&forum=13 propecia online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=83&forum=13 cheap albuterol] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=85&forum=13 cheap alprazolam] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=153&forum=13 buy viagra] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=148&forum=13 tramadol online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=143&forum=13 free sony ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=86&forum=13 cheap ambien] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=103&forum=13 free funny ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=104&forum=13 hgh online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=129&forum=13 free polyphonic ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=90&forum=13 cheap cialis] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=123&forum=13 nokia ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=101&forum=13 but flexeril] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=124&forum=13 norco online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=149&forum=13 cheap ultracet] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=88&forum=13 carisoprodol online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=108&forum=13 kyocera ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=93&forum=13 clonazepam online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=127&forum=13 pharmacy online online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=95&forum=13 cyclobenzaprine online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=150&forum=13 cheap ultram] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=111&forum=13 lisinopril online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=159&forum=13 xenical online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=162&forum=13 zyban online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=116&forum=13 free mono ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=112&forum=13 lorazepam online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=145&forum=13 sprint ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=110&forum=13 cheap lipitor] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=131&forum=13 prozac online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=120&forum=13 free music ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=105&forum=13 cheap hoodia] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=155&forum=13 vigrx online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=98&forum=13 cheap diethylpropion] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=113&forum=13 cheap lortab] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=154&forum=13 vicodin online] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=119&forum=13 free mtv ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=84&forum=13 alltel ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=141&forum=13 cheap soma] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=107&forum=13 free jazz ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=140&forum=13 cheap sildenafil] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=126&forum=13 cheap paxil] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=118&forum=13 mp3 ringtones] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=92&forum=13 cheap clomid] [http://people.msoe.edu/~millerni/forums.php?show=topic&id=91&forum=13 cingular ringtones] == POV display ==
| + | == POV display == |
| | | |
| [[User:DavidCary]] is building yet another "POV display". | | [[User:DavidCary]] is building yet another "POV display". |
Revision as of 02:15, 29 June 2007
POV display
User:DavidCary is building yet another "POV display".
I plan on putting a few features into my display that I haven't seen in any other so far:
- bright blue LEDs (even though blue is usually the most expensive color ... although sometimes "true green" is even more expensive than blue).
- no slip rings -- just pumping energy across an air gap
- ... and a few other features that I'm keeping hush-hush.
I want lots of lumens.
Unfortunately, when I go to pick LEDs out of the catalogs, they're not
rated in lumens, they're rated in candelas.
Is it even possible to estimate "lumens" from the catalog information?
Do you know what the difference is? Does your flashlight really
produce 10 times the light ( in lumens)? Or does the flashlight merely
focus its light on a tiny spot, so that that spot gets 10 times as
many candelas ?
For example, check out these 2 LEDs:
$8.75 SSP-LX6144C7UC : 4000 mcd at 120 mA
$8.75 SSP-LX6144D7UC : 1800 mcd at 120 mA
From the mcd rating, it appears that the first one is more than 2wice
as bright -- and it is, if you're directly in front of it when you
look at it.
However, if you're even the tiniest bit off-center, the second one is
much brighter -- in fact, the total lumens that second LED puts out
(2500 mlm) is slightly more than the total lumens than the first one.
If you diffuse the light and try to light up a whole room with an
array of them, the second one will make the room brighter.
I'm currently planning on using these in my first POV display:
- $1.32 Telux TLWB7900 : blue : 330 mlm, 231 mcd at 50 mA. (price in ones from http://Newark.com/ )
Other LEDs I considered using in my POV display (and may re-consider for my next one):
- $18.89 "Lamina light engine" BL-22B1-0140 : 22000 mlm at 420 mA. (this price includes the required heat sink -- price in ones from http://Digikey.com/ ). This has the most lumens per dollar I've found so far (for blue LEDs).
- $8.750 Sunbrite LuxLEDs SSP-LX6144D7UC blue: 120 mA, 2500 mlm, 1800 mcd (Odd that the red Sunbrite LuxLEDs are cheaper at Newark, the other colors cheaper at Digikey.) cheapest $/lumen blue LED, except for the "light engine"
- $2.550 Lumex "DSP LED" 67-1876-ND: blue, 5 mm, 2500 mcd ( DigiKey ) apparently have some kind of internal chip. All colors run at 2.0 V nominal (1.5 V minimum) (rather than running on current like most LEDs. unfortunately, the data sheet doesn't suggest how much current they take -- I presume more than 20 mA).
- $1.600 Sunbrite "based LED" SSP-01TWB7UWB12 (441-1007-ND) blue 10 mm 20 mA 7000 mcd
- $5.980 GM5WA06270A SMT RGB (35 mA red, 35 mA green, 35 mA blue) 3000 mcd (full color range -- apparently used for digital camera flash ?) (Digikey)
Spoke-POV and propeller clocks links:
Is this http://led-display-and-design-swicki.eurekster.com/ relevant?
I think so--71.234.233.163 18:06, 22 June 2007 (PDT)