POV display

From OpenCircuits
Revision as of 14:37, 4 October 2007 by 66.249.2.50 (talk)
Jump to navigation Jump to search

Voyeur free video Palio chat it Hotel florence Soggiorno venezia Istruzione it argomento concorso titoli Ricerca scuola geografia francia cassa edile napoli Anal insertion Siderno Prestito rapido Stampante laser samsung Www xstream tv Sunia veneto Temi svolti razzismo Pantera rosa Guendalina canessa nuda Segretarie sexy Consulti cartomanzia amore tarocchi John cena Hotel san benedetto tronto Lucilla agosti sexy Belle figa Ww3 voyeurweb com Hotel economico stoccolma Occhiali da vista La nuova sardegna Love lycos it Mischa barton Mega culi Foto fisting Foto transessuale Super troie Fighe grosse Spiderman2 Accendino cartier Shut up and blow me Geronimo stilton gioco Sborra cavallo Gssupermercati Emmelunga sicilia Motorola sfondo Albergo riga Free pics shemale Cure termali sirmione Oroscopo giornaliero Fuorissimo mail Brigitte nielsen Bullone titanio Divisori glitter Esibizioniste porno Agenzia del turismo roma Backstage calendario Cardgame club Gatteo mare Tette vip Felpa guru Sonia eyes foto Meteo francia Grafico andamento borsa ultimi 10 anno Confronto auto assicurazione california Calabria residence villaggio Trailer video porno Ftv girl Adolescenti nudi loan rata automarket it Ebai Mutuo banco sicilia Nudists Disegni per stencil Voli scontati varsavia Significato sogno outseek Luino Comici Profilo contro soffitto Livescore it Foto capelli corti Accessorio piscina fuoriterra Pavimenti resina napoli Fijlkam Escortforumit com Gelato algida Sannio Invia sms free Cannella abbigliamento Cucine classiche legno Crociera single barcellona Registrazione msn messanger Beyblade g revolution Miniclip Marina di grosseto Albacom Cellulare telit Telecamera sony professionale Vacanza capodanno austria Chiavare Cd musica hard rock metal universal Tirrenia Sagem suoneria Sborra calda key usb2 thermaltake xaserv muvo micro 256 macchinari stampa trucchi halo xbox camera potenza www rockbottom it lacie porsche 2 5 makiritare cedrino simplicity tavoli e sedie piemonte lesbian anal www anna kanakis occhiale da vista pagine bianch fantomas karl popper calendario 62 catania 2002 palloni da calcio heart light donna cuori pooh televisori panasonic i tony hawks pro skater 2 sicilia nikon coolpix 3700 calma e sanfue freddo case al mare in vendita harman 130 archos av420 pocket video recorder train stop cuckold catania videos musical del reggaeton assicurazione agrate brianza amanti folli fox uomo sonia nino d agostino rapper nelly typ top codici tributi volvo v40 1.9 d bendita vida guida di sant angelo lodigiano nascita prezzi pullman per provenza frasi fatte dock-to-firewire 800 asus a7v8x jlenia show forum software motorola v525 asrock 775s61 canon ip2200 electra glide scuola provveditorato caserta musica e sdk per doom 3 adattatore usb pad concessionaria citroen ferrara equilibrio instabile cuffie stereo con microfono valter palace - a boscolo first class hotel le notti paola turci formica benedetto denti squalo grandi tettone ringraziamenti laurea amd athlon x2 4800 www temptation it fiat 600 usata spaceman gold stricke treni plastico hard top audi tt roadster poezie ron my love i pionieri del west forest whitaker galp rockol okifax 5680 premiere 6 le patch italiano this love di marron five racing wheel hup land 2 nikon coolpix 5200 batterie per foto e www eminemworld com canon eos d 350 prendi il mio cuore polistirolo palline alchimik canon ef 100mm 2 8 map europe oltre il destino foto de porno tradita libri pulitzer, joseph il mio amino vende il scheda video ati radeon 256 mb tv in e Backstreet boy testo incomplete Memoria toshiba tecra Mutuo acquisto prima casa Polski nuda Salisburgo cose fare Classic pornstar Testo canzone yellow coldplay Tesi fisioterapia Callaway golf Free hentai movies Problema adsl tin Frasi top amore Brigitte bardot Tema globalizzazione Risorsa del computer Mail fastwebnet it Juggernauts 5 carmella bing dvd rip Todowebxcams com Calcio napoli it Sextvcom Troie sborrate Kim basinger Foto grassone Truffe internet Motoseghe Kristina fey new picture Rio de janeiro intrattenimento Troie succhiacazzi Residence gargano Puttane in calore Spycam sex Ricetta con zucchine Bicchieri birra Hotel sfilata salerno Hotel cortina Caravan usato it Fotoromanzi selen Jack russel parson Porcellone pompinare Terme rapolano siena Lift chair Attrezzatura sportive leg press winx club giochi Capracotta it Grossi culi Arredamento interior design progettazione Fondo investimento Belle donne che scopano Messico cose fare Palalottomatica Bipielle ducato Cartoni famosi xxx Lavazza in cialda Schermo piatto pc Vendo citroen ds Dvd pinco Archiviazione ottica Cuffia wireless Exploited teen Schicchi sex La sirenetta disney Latina pussy Nino manfredi Tattoo stelle Cracovia ristorante San paolo imiit Leasing operativo Ginecologo on line Sborrate animali Amenorrea causa Ringhiera legno Sexi shop napoli Rdb Pensioni per cani Figlia scopa padre racconto Tatuaggi celtici Download software busta paga Albergo 5 stelle Pompini di negre Albergo faro Porn comic dirty Webmaileuteliait Collant Brebanca Maxmarait Cellulare vodafone Donna pelosa Lisa ann Fagottini pasta sfoglia Www poppea com Depurazione delle acque reflue Rivestimento facciata pietra brianza The lovely silvia saint vmd Copertina fronte e retro per ps2 Nuda silvia saint Aixam it Pavimenti in marmo Ricetta estive Porno free sicuro Nokia 6600 kia auto testi blink 182 russian play mate brussa prezzi carburante self-made man testo vola lazio vola batteria acer c300 ingegneri livorno incotex pantalone curatela fallimentare s.o.b. blu club hilton profumo grigio perla aladino wi fi hl 2030 allied telesyn cuffia per dj pamela anderson lee video gratis petardas com videos fer met jaguar salerno www leila giulia e giulia l amico fritz vasco concerto genova volo havana krug 1990 povest canon eos 350d reflex fotocamere viaggio avventura jizz hut tima after time tv da auto e dvd grandi tenori ferrari mondial cabrio albergo economico bruxelles annunci no mercenari con cell. cazzo in culo e orgie paktofonika smart emilia romagna tabla de volumenes dragostei die ti royal gigolo california dreaming fondo monetario internacional brighthouse quotazione borsa salva nuova lontra cnc toner samsung ml 1210 dante ha un appuntamento con il giappone cafrune jorge rubens eizo s1910 fsc consulting accordo per chitarra testi canzoni placebo sido maske discoteca holliwood commento canto x inferno sito inviare sms gratis e-racer pc wedel in holstein filmato spot adidas inner city blues readiris pro auto taroccate pentium d 840 3 2ghz 800 2mb dualcore satellitare da macchina tatics core giocattoli elettronici tertulliano virgo fidelis toner samsung scx 4100 una pistola tranquilla gli incensurati vaio bluetooth integratori eas toydolls seggiolino bambino per auto new line spa giuseppina (imperatrice dei f... radiocomando 3 canali vesti una star hazel grove and bramhall stanisa protect the chorleau ramona d-link dbt-120 bluetooth quarantamila cavalieri hotel pisana palace rock latino notebook borse samsonite amiga veneno calendario di valeria marini eau de merveilles - hermes jeans donna roberto cavalli avvitatore teoria z == 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 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)