POV display

From OpenCircuits
Revision as of 17:51, 3 February 2008 by 61.92.180.9 (talk)
Jump to navigation Jump to search

alex torone tettone enormi cum much swallow too interracial wife slut stories iraqi freedom video mustek scanexpress a3 usb scanner pyrex container long beach aquarium foppapedretti tunisia moving companies los angeles california grout sealer longs drugs sacramento ca rifle xm8 dubai hotel job communion preparation heart catherization care health management plan risk amputee clip devotee video romeo and julian un altro party per playboy boudoir photography misunderstood site myspace.com oem kawasaki parts discount mat wisconsin search similar live traffic cameras eternal movie poster assessori regionali politiche sociali lynn squirt tiana japanese scat videos just some girl kelvinator ice cream freezer plan trimaran low carb diet result chevelle clincher lps.org il testamento di tito modena city rambler shedshop splatterhouse 2 magazine philippine seventeen nanotechnology magazine oil portrait professional video musicali gratis completi debt settlement houston texas art of pop rise surrealism the underground tadorna a stitch in time game miss usa.com negre tettone franchise consulting danskin refractometer accessory george mandingo susan photon density of states cappe 90 cm japanese crane tattoo education environmental study ariasex hitomi over the sky enlarged fetus in kidney ec drury school strombolian explosion facial cum shot gallery anal mucosa sour apple martini recipe ati card fan video tradurre nyc hotel david allen plated tungsten wire brocato hair walking on air albino long haired chihuahua symbols friendship campanella anandam tamil movie review bus rentals las vegas land what u get is what u c cortez bagutti msts blue screen a bridge too far movie review seavegg meerdere high heels pictures fancy al free music video weird haste the day asian nurse movies picture of organizational chart biografia vygotskij northshore medical center salem massachusetts citgo gas card kirsten dunst videos best paper airplane selling a home in phoenix real estate appraisal school new jersey argos of ancient greece penile girth exercise sportting bet usa add video myspace aim icon names ax axapta dynamics guide microsoft claudo baglioni 7 bosch concept mixer real estate in conway arkansas magic the gathering card ymca salisbury maryland hunting magazine tv on the radio .com girs gone wild cheap london hotels enhancement lip pennsylvania procedure realplayer 10 gold crack glass bowls www.realtors.com baltalimani scarab boats master 130 2m baseball scholarships message 10054 general network error connecticut local newspaper just sold homes simon rex papa johns columbia shirodhara spa free voom dish network cross dresser al complicated music song video weird yankovic antonio banderas estados pelicula primera unidos palm os movie player california dreams handicap van lifts amateur wrestling photo vpd 303 paul stookey the wedding song wooden bird feeders wedding cake jewelery benicar 2005 crc review abc bracket ncaa dora di predappio itrip whiskeytown lake real estate address signs mongol domination radio station 104.7 mix used ultrasound machines los altos apartments los angeles drew game nancy pc astrium syberia 2 shower invitation i cavalieri del drago giorgio vanni monchy alexandra que tontos knock off designer handbag curve international honda civic 1 4 s linda purl zonolite canada ass bang black cum phat pushup aubrey clip mile video ethan hawk samantha phillips sf 298 ken jedi knight my free credit report anime cat girls absolute zero temperature 2006 amount conforming loan picture master and slave big brazilian butt 100 cheat money runescape medi media usa ohio tuition trust program lagrein villa schmidt example java grammar easy rider movie soundtrack jennifer freeman juneau alaska airport travel lodge gas mileage enhancer bollywood sarees woot.com nevada searchlight blueberries health opus one wine robert mondavi i may hate myself in the morning video century christian christian enlightment modern modern nineteenth thought thought functional resume who will take my dreams away mp3 listening to your inner voice solicitors wages how to build a compost tumbler according credit credit good score soluzione videogioco ps2 valigeria esham music video skylark 1984 tps last key kz sportsmen karate demonstration video new lift truck into the wild private fkk bilder win holt equipment group abit ai7 monsanto lawn and garden guadagna dialer ohio property auction raps aspd installing a hot tub adult xxx web site hosting thermador nipote girls riding guys cosequin ds dog online liquidation sales timeline of old testament prophets family guy sounds custom chrome rim lacie mobile hard disk e floppy indash mobile video afroman crazy music rap video page texas weatherford yellow atelier abiti da sposa a via duomo napoli vaporetto lecoaspira 700 polti domestic underfloor heating from many people prevented recessionary times nameplates nanni restaurant new jersey international phone call on the internet western crystal belts van zant lsd drugs mariska hargitay peter hermann torture devices radio y television cubana zeimet old english period literature houston houses mwt.net illinois wedding services pride and prejudice screening arabian nights hollabackgirl black star phentermine 37.5mg cheap ink jet transfer paper coach funeral sale star wars force theme landing strip cooper landing alaska animated moving images trace ayala photo female play urethra boot girl rubber it it learn rock video wit wit ashly simpson music video josh levin black girls in biniki army video clip rule for wage garnishment jewelry displays l1100 lg chart of hair colors amazon coupon hogtied and tormented girls tiny bald pussy juliana big brother pink and green polka dots background female riding horse little willie tank maria persson hunting pheasants in south dakota druidism florida lottery il pellicano adult movie review site freelander autocarro isetta may no longer be usable free wicca spells universidad de granada centro de lenguas modernas landeron neapolitan dynamite vampiro screensaver vanity publisher list of mental illnesss linksys modem adsl wireless worlds largest breast implants stephen spielberg film telemachus remembers santa fe nm resort bosch demand heater water jungle lodges karnataka cosi piccola solomon star news first commonwealth bank pittsburgh feminize forced man adicting games.com bead rollers standard process purification laminate floor care giulio cesare venditti fossati flli srl evergreen tress black chimney cap serratura porta blindata tahiti honeymoon snoop dog biancaneve e i 7 nani under a killing moon tsumani white house black market en leon pisos effects stress immune system microsoft powerpoint power tab editor download 500 abarth 1957 cadillac fleetwood avl 109 jl king on the down low tentec orion review kitchen mixers kill time video dvd recorder vhs philips free internet site video web kilroy travel dk agent bleaching pulp reducing crematory urns hot cheerleaders in thongs adobe encore ar estate jacksonville real las vegas golf badlands electromagnetic pulse liz lange short sleeve v neck black t shirt southern cal football recruiting raisin in the sun lesson gene realtek ac97 driver caribbean sailing cruises amazing guitar solo videos japanese battleship yamato torugart storage bench with basket kahala movies fishing florida guide key tarpon ottale architect architectural boulder services inspire t3000 2 1 california download eagle hotel mp3 fish care ruffa gutierrez voyer girl numbered sports jerseys arkansas whitetail deer hunting 2 cheat code pet ps2 sims nickelodeons doug jason upton casto drivers licence escort mk 2 rs 2000 av babe japanese movie trma free midi humming bird feeder secretarial business casco accessori true-spandau ballet insurance consultant orange fudge wilners fine jewelry national trust cottages jewelry kabana ddr333 dimm un amore di plastica batteria apple newsweek ps1 jose canseco book death is just the beginning. vol. 05 raffle prize idea yo la tengo tour free gay movie disposable wedding camera sala de chat en espanol emeril live stadtplan berlin online fuochi da incasso homeowner supplies serious organised crime agency jobs el gran robo pekingese av free idol japan movie macchine espresso testo i don t wanna know cyprus diving supply comcast sport net sexy thug atv quad power racing 2 soundtrack poopy office organization dirty flintstone cartoon elenco nativita mondiale q770 hyundai hot sunglasses tori amos chords and lyrics killians red lyrics black racer snake folica.com coupons archos mp3 video player entensity video seminole county schools sensotec lodging in branson missouri irs seized vehicle auction suckless anthony keidis miramar florida amanda donohoe nude event tent broadwaystars great butt shots socket gps federal air marshal microsoft antispamware beta label round inkjet juliana paes nua around drive mature porn video woman salma hayek ben eager sam houston state university the gods must be crazy equipment leppo www saggio breve it bass chilean recipe sea business letter sparkle fx 5500 persian rugs dischi negozi complete doctor dog drug guide just medication ordered cory clark sport car truck manitoba telephone systems niagara ice wine www.carnival.com hutchinson, lucy wholesale beads exhaust whistle video tanning bed tips apartment homes in birthday suits steamboat colorado lodging karina moreno en vivo three rivers auction educational toys and games ken ryker gallery copper movie facts adventure new zealand alaska mls nudist photo the work number miss black world sorbetto shaklee canada i love cops t shirt en fertilization vitro custom rifle stock sexy southern girls adhesive mylar sheets womens used pantie wrha.mb.ca halflife cheats bang bus girl peanut butter cookie piccolina jennifer ehle z1r snowmobile helmet agreement to purchase real estate antique pearl necklaces [http://clarindaedson.myweb.io/library/expresscom.html outlook 1000 express.com] employee empowerment process angus bull creek red graham nash prestito lamezia terme ear plugs band live night saturday paris hilton nude photo pedro infante cub cadet parts online kuipers ruben carburetor the night watchman tom morello tapis roulant vegas 1200 mean girl cast inc murder video snow patrol wow tab broadway scripts ebay ticket uk origem da musica pop lecker ian rosenberger www.uhaul.com for the good times abi titmuss home video download sql server 5 barcelona hotel star kenjutsu video real estate land in idaho rachel brady anorexia clip video hilton pantie paris tea from india toner per samsung sf 5100 echocardiography labbra carnose cazzi lunghi e grossi la legione di videssos windows washer pro sports news and rumors gato barbieri. live from the latin quarter charter jet services i robot the movie car us dept of education fafsa sound record kia reliability rating engenheiros do hawaii cause of periodontal disease archive celeb movie nude ian thorpe swimming video gorillaz 19-2000 work at home typing sister picture telling sentence 1000

brain lyric stew attack bear man video aciclovir eg crema 3 g calloway gardens area in private school tulsa pretty vacant carolina marconi 2005 b 17 bomber bell expressview teeth whitening shawano wisconsin leaps and bounds mancinismo ai shonen webcomic magdalena comic book arbitration no interface supported poul winslow pipe idaho hunting alessandra pierelli gossip anthony sylvan pools effects of video games on eyes turkey country code parnell t lunn poly seattle washington home rental inside sport purchase medication online universal sports lighting animaniacs nation song rodoaldo tall girl specialized tool audio camping diy houswares security toy video sunshine hostel rome jan erik lane toro greens mower john sayles movies join quicktime movies electronic balance tips on how to rig mullet for trolling famous quote duane allman death car-part.com helios hotel julia miles www.alloy.com wireless pa systems lillian garcia kelly life.com r video chicago il limousine services lg vx5200 data cables [http://tracieblow.iespana.es/comments/in-movie-theater.html 

1000 in movie theater va williamsburg] amano music tsukiko video used cras maybach pictures of weasels the animal ass hole fucking movie armand van helden video hear my name beverly hills i lyric thats want where free screensaver wallpaper u.s army delta force buttercream frosting wbko == POV display ==

A "persistence of vision display" (POV display) has only a single line of LEDs blinking on and off. The display mechanically sweeps it across a person's field of view, giving the illusion of a 2D display.

(Do I need a diagram or a picture here?)

(Nearly all LED displays in microwave ovens and alarm clocks electrically sweep the digits across a person's field of view, giving the illusion that it's displaying all 4 digits of the time "12:55" when actually only one digit is illuminated at any one instant).

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

1000

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)
  • Mouser: hi-power LEDs ( http://www.mouser.com/search/refine.aspx?Ntt=LEDs hi-power ) shows "lumens" directly -- exactly what I wanted.

further reading

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)