{"id":795,"date":"2013-08-06T04:22:24","date_gmt":"2013-08-06T01:22:24","guid":{"rendered":"http:\/\/devrearsiv.com\/?p=795"},"modified":"2013-09-14T23:48:25","modified_gmt":"2013-09-14T20:48:25","slug":"led-aydinlatma","status":"publish","type":"post","link":"https:\/\/devrearsivi.com\/led-aydinlatma\/","title":{"rendered":"LED AYDINLATMA"},"content":{"rendered":"

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S<\/span><\/strong>uper parlak LED’ler ucuzlad\u0131ktan sonra, flamanl\u0131 ampullerin yerini almakta gecikmediler. Ak\u0131m\/(\u0131\u015f\u0131k \u015fiddeti) oranlar\u0131 flamanl\u0131 ampullere g\u00f6re \u00e7ok daha d\u00fc\u015f\u00fck olan ledler ak\u00fcden \u00e7ok daha az ak\u0131m \u00e7ektiklerinden, biz elektrik pintisi yelkenciler i\u00e7in olduk\u00e7a caziptirler. Ayr\u0131ca di\u011fer ampullere g\u00f6re \u00f6m\u00fcrleri \u00e7ok daha uzun oldu\u011fundan ekonomik olarak da \u00e7ok avantajl\u0131d\u0131rlar. Art\u0131k pek \u00e7ok teknede, seyir \u0131\u015f\u0131klar\u0131nda bile LED’ler kullan\u0131lmaya ba\u015fland\u0131.<\/span><\/span><\/p>\n

L<\/span><\/strong>edlere tipik olarak 100.000 saat kullan\u0131m \u00f6mr\u00fc bi\u00e7ilmekte ise de bu ancak optimum ak\u0131m de\u011ferleri i\u00e7in ge\u00e7erlidir. Verilen nominal ak\u0131m de\u011ferinin iki kat\u0131nda ledlerin \u00f6mr\u00fc, 100 saat ya da daha k\u0131sa olur. Bu nedenle ak\u0131m reg\u00fclasyonu gereklidir.<\/span><\/span><\/p>\n

G<\/span><\/strong>enelde bu, ba\u011flanan seri bir diren\u00e7le sa\u011flan\u0131r. \u00d6rne\u011fin 12 volt ak\u00fcden led yakmak i\u00e7in; nominal ak\u0131m\u0131 25 mili amper ve bu ak\u0131mda d\u00fc\u015f\u00fcrd\u00fc\u011f\u00fc voltaj 3,5 volt olan ledlerden \u00fc\u00e7\u00fc seri ba\u011flan\u0131r, \u00dczerlerinde d\u00fc\u015f\u00fcrd\u00fckleri voltaj 3,5 x 3 = 10,5 Volt olaca\u011f\u0131ndan, geri kalan 1,5 voltu \u00fczerinde d\u00fc\u015f\u00fcrecek bir diren\u00e7 de bunlara yine seri olarak ba\u011flan\u0131r. Bu direncin de\u011feri (Dire\u00e7=Voltaj\/Ak\u0131m) form\u00fcl\u00fcyle hesapland\u0131\u011f\u0131nda; 1,5V\/0,025A= 60 ohm olarak bulunur. Standart diren\u00e7 de\u011ferleri i\u00e7inde buna en yak\u0131n de\u011fer 62 ohm oldu\u011fundan rahatl\u0131kla 62 ohmluk bir diren\u00e7 kullan\u0131labilir. Diren\u00e7 \u00fczerinde ka\u00e7 watt harcanaca\u011f\u0131n\u0131 da (P=IxV) 0,025×1,5=0,0375W olarak buluruz.<\/span><\/span><\/p>\n

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L<\/span><\/strong>edlerin nominal ak\u0131m\u0131n\u0131 biliyorsak, ayarl\u0131 DC kayna\u011f\u0131m\u0131zla 0 vottan ba\u015flayarak yava\u015f\u00e7a voltaj\u0131 artt\u0131r\u0131p bu ak\u0131m de\u011ferine eri\u015fince voltaja bakarak \u00fczerlerinde ka\u00e7 volt d\u00fc\u015f\u00fcrd\u00fcklerini de bulmu\u015f oluruz. Sonra da kullan\u0131lmas\u0131 gereken direnci bulmak \u00e7ocuk oyunca\u011f\u0131. Bu kadar uzun uzad\u0131ya sizi form\u00fcllere bo\u011fmam\u0131n nedeni super parlak ledlerin tiplerine g\u00f6re nominal ak\u0131mlar\u0131n\u0131n birbirinden olduk\u00e7a farkl\u0131 olmas\u0131.<\/span><\/span><\/p>\n

A<\/span><\/strong>ncak teknelerde ak\u00fc voltaj\u0131 hi\u00e7 bir zaman 12 Volt’da sabit kalmaz (ak\u00fc bo\u015fald\u0131\u011f\u0131nda) 11 Volt’dan (motor \u00e7al\u0131\u015f\u0131rken \u015farj alt\u0131nda) 14,5 Volta kadar de\u011fi\u015fir. Do\u011fald\u0131r ki 14,5 Volt uyguland\u0131\u011f\u0131nda yukar\u0131da g\u00f6sterilen devreden 25 miliamperin olduk\u00e7a \u00fczerinde bir ak\u0131m ge\u00e7ecektir. (14,5-10,5=3V), 3\/60=50ma) Bu \u015fekliyle kullan\u0131ld\u0131\u011f\u0131nda bir s\u00fcre sonra ledlerin s\u00f6n\u00fckle\u015fti\u011fi ya da hi\u00e7 yanmad\u0131\u011f\u0131 g\u00f6r\u00fclecektir. Ak\u0131m\u0131 azaltmak i\u00e7in direnci daha b\u00fcy\u00fck de\u011ferde se\u00e7sek, bu kez de voltaj d\u00fc\u015ft\u00fc\u011f\u00fcnde ledler s\u00f6n\u00fckle\u015fecek ve istenilen \u0131\u015f\u0131k \u015fiddetini veremiyeceklerdir. Ayr\u0131ca g\u00fc\u00e7l\u00fc LED’ler \u0131s\u0131n\u0131rlar ve \u0131s\u0131nd\u0131k\u00e7a diren\u00e7leri d\u00fc\u015fer, yani voltaj sabit kalsa bile LED’in \u00fczerinden ge\u00e7en ak\u0131m, LED \u0131s\u0131nd\u0131k\u00e7a artar.<\/span><\/span><\/p>\n

O<\/span><\/strong><\/span>\u00a0nedenle de teknelerde LED \u0131\u015f\u0131kland\u0131rmalar\u0131 i\u00e7in sabit ak\u0131m reg\u00fclasyonuna gerek vard\u0131r. Bu da a\u015fa\u011f\u0131daki devrede g\u00f6r\u00fclece\u011fi gibi LM7317T voltaj reg\u00fclat\u00f6r entegresini bir diren\u00e7 \u00fczerinden geri beslemeyle, ak\u0131m reg\u00fclat\u00f6r\u00fc olarak kullanarak kolayca yap\u0131l\u0131r. Devrede +12V ile g\u00f6sterilen ak\u00fc voltaj\u0131 ne kadar y\u00fckselirse y\u00fckselsin LM317’nin \u00e7\u0131k\u0131\u015f\u0131ndaki ak\u0131m sabit kal\u0131r.<\/span>
\n<\/span><\/p>\n

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Y<\/span><\/strong>ukar\u0131daki \u015femada a\u00e7\u0131k renkte g\u00f6sterilmi\u015f LED’leri de devrenize ekleyecekseniz ak\u0131m\u0131n 3’e katlanmas\u0131 gere\u011fini g\u00f6zden ka\u00e7\u0131rmay\u0131n. Super parlak ledler genellikle 3 volt civar\u0131nda nominal ak\u0131mlar\u0131na eri\u015firler. Bu y\u00fczden, (reg\u00fclat\u00f6r \u00fczerinde de voltaj d\u00fc\u015fmesi olaca\u011f\u0131ndan) 12V ak\u00fc i\u00e7in, devrede 3’er seri LED’den olu\u015fan gruplar (3x3V=9V) kullan\u0131lm\u0131\u015ft\u0131r. 3 LED’den fazlas\u0131n\u0131 seri olarak ba\u011flarsan\u0131z LED’lerin parlakl\u0131\u011f\u0131 azal\u0131r. Paralel ba\u011flant\u0131larda (a\u00e7\u0131k renkli 3’l\u00fc gruplar gibi) s\u0131n\u0131r\u0131 reg\u00fclat\u00f6rden alabilece\u011finiz maksimum ak\u0131m belirler.<\/span><\/span><\/p>\n

L<\/span><\/strong>M317T’den iyi bir so\u011futucu ile en fazla 1,5 amper ak\u0131m \u00e7ekilebilece\u011fini g\u00f6z \u00f6n\u00fcnde bulundurun. Daha y\u00fcksek ak\u0131mlara ihtiya\u00e7 varsa LM338T kullanabilirsiniz. LM338T’ den b\u00fcy\u00fck bir so\u011futucu ile 7 ampere kadar ak\u0131m \u00e7ekebilmek imkan dahilindedir.<\/span><\/span><\/p>\n

E<\/span><\/strong>lde etmek istedi\u011finiz ak\u0131m i\u00e7in devrede gereken rezistans de\u011ferini bulmak i\u00e7in; a\u015fa\u011f\u0131daki b\u00f6l\u00fcmde, ak\u0131m de\u011ferini miliamper cinsinden girip, hesapla d\u00fc\u011fmesine t\u0131klay\u0131n. Bir alt sat\u0131rda gereken direncin de\u011feri ve en az ka\u00e7 watt’l\u0131k olmas\u0131 gerekti\u011fi g\u00f6r\u00fcnt\u00fclenecektir.<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Super parlak LED’ler ucuzlad\u0131ktan sonra, flamanl\u0131 ampullerin yerini almakta gecikmediler. Ak\u0131m\/(\u0131\u015f\u0131k \u015fiddeti) oranlar\u0131 flamanl\u0131 ampullere…<\/p>\n","protected":false},"author":1,"featured_media":1054,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,12,22],"tags":[258,224,257],"aioseo_notices":[],"featured_image_urls":{"full":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",480,180,false],"thumbnail":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler-150x150.gif",150,150,true],"medium":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler-300x112.gif",300,112,true],"medium_large":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",480,180,false],"large":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",480,180,false],"1536x1536":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",480,180,false],"2048x2048":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",480,180,false],"covernews-slider-full":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",480,180,false],"covernews-slider-center":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",480,180,false],"covernews-featured":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",480,180,false],"covernews-medium":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",480,180,false],"covernews-medium-square":["https:\/\/devrearsivi.com\/wp-content\/uploads\/2013\/08\/ledler.gif",400,150,false]},"author_info":{"display_name":"Ferhat \u00c7elik","author_link":"https:\/\/devrearsivi.com\/author\/94ferhat\/"},"category_info":"Basit Elektronik Devreler<\/a> Elektronik Devreler<\/a> Malzeme Bilgisi<\/a>","tag_info":"Malzeme Bilgisi","comment_count":"0","_links":{"self":[{"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/posts\/795"}],"collection":[{"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/comments?post=795"}],"version-history":[{"count":5,"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/posts\/795\/revisions"}],"predecessor-version":[{"id":1051,"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/posts\/795\/revisions\/1051"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/media\/1054"}],"wp:attachment":[{"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/media?parent=795"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/categories?post=795"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devrearsivi.com\/wp-json\/wp\/v2\/tags?post=795"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}