{"id":5651,"date":"2022-01-04T14:46:37","date_gmt":"2022-01-04T11:46:37","guid":{"rendered":"http:\/\/www.temrinler.com\/?p=5651"},"modified":"2023-11-20T12:14:21","modified_gmt":"2023-11-20T09:14:21","slug":"ldrli-karsilastirici","status":"publish","type":"post","link":"https:\/\/www.temrinler.com\/?p=5651","title":{"rendered":"LDR\u2019li kar\u015f\u0131la\u015ft\u0131r\u0131c\u0131"},"content":{"rendered":"

G\u00f6rsel 3.14\u2019te LDR ile yap\u0131lan kar\u015f\u0131la\u015ft\u0131r\u0131c\u0131 g\u00f6r\u00fclmektedir. Potansiyometre ile 3 V\u2019a ayarlanan referans gerilimi eviren u\u00e7tan verilmi\u015ftir. Vg giri\u015f gerilimi, referans gerilimi olan 3 V\u2019un \u00fczerinde oldu\u011funda \u00e7\u0131k\u0131\u015f pozitif, 3 V\u2019un alt\u0131nda oldu\u011funda \u00e7\u0131k\u0131\u015f negatif olur. LDR karanl\u0131k ortamda direnci artt\u0131\u011f\u0131ndan \u00fczerine d\u00fc\u015fen gerilim artar ve referans gerilimi \u00fczerine \u00e7\u0131kt\u0131\u011f\u0131nda \u00e7\u0131k\u0131\u015f pozitif olur ( yakla\u015f\u0131k 11V) ve LED yanar. Aud\u0131nl\u0131kta\u00a0 LDR\u2019nin direnci d\u00fc\u015fer. LDR \u00fczerine d\u00fc\u015fen gerilim de d\u00fc\u015fer. Bu gerilim 3 V\u2019un alt\u0131ndaysa \u00c7\u0131k\u0131\u015f negatif olaca\u011f\u0131ndan ( yakla\u015f\u0131k 11V ) LED s\u00f6ner. Vref ayarlanarak istenilen \u0131\u015f\u0131k \u015fiddetinde \u00e7\u0131k\u0131\u015f vermesi de ayarlan\u0131r.<\/p>\n

\"\"<\/a><\/p>\n

G\u00f6rsel 3.14: LDR\u2019li kar\u015f\u0131la\u015ft\u0131r\u0131c\u0131 devre<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 MALZEME L\u0130STES\u0130<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n
Ad\u0131<\/strong><\/td>\n\u00d6zelli\u011fi<\/strong><\/td>\nSembol\u00fc<\/strong><\/td>\nG\u00f6r\u00fcn\u00fc\u015f\u00fc<\/strong><\/td>\nMiktar\u0131<\/strong><\/td>\n<\/tr>\n
\u00a0<\/strong><\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
Opamp<\/strong><\/td>\n741(DIL-08 k\u0131l\u0131f)<\/td>\n<\/td>\n<\/td>\n1 adet<\/td>\n<\/tr>\n
Diren\u00e7<\/strong><\/td>\n1k<\/td>\n<\/td>\n<\/td>\n1 adet<\/td>\n<\/tr>\n
Diren\u00e7<\/strong><\/td>\n10k<\/td>\n<\/td>\n<\/td>\n2 adet<\/td>\n<\/tr>\n
Potansiyometre<\/strong><\/td>\n10k<\/td>\n<\/td>\n<\/td>\n1 adet<\/td>\n<\/tr>\n
LED<\/strong><\/td>\nK\u0131rm\u0131z\u0131<\/td>\n<\/td>\n<\/td>\n1 adet<\/td>\n<\/tr>\n
LDR<\/strong><\/td>\n5mm (10k)<\/td>\n<\/td>\n<\/td>\n1 adet<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/strong><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u0130\u015eLEM BASAMAKLARI<\/strong><\/p>\n

    \n
  1. LDR\u2019nin ayd\u0131nl\u0131kta ve karanl\u0131kta diren\u00e7 de\u011ferini \u00f6l\u00e7\u00fcp Tablo 3.7\u2019ye yaz\u0131n\u0131z.<\/li>\n
  2. G\u00f6rsel 3.14\u2019teki devreyi kurunuz.<\/li>\n
  3. Voltmetreyi eviren giri\u015fe ba\u011flay\u0131p (Vref) 3 V olacak \u015fekilde potansiyometreyle ayarlay\u0131n\u0131z.<\/li>\n
  4. Voltmetreyi evirmeyen giri\u015fe (Vg) ba\u011flay\u0131n\u0131z. Karanl\u0131k ve ayd\u0131nl\u0131kta Vg noktas\u0131ndaki potansiyeli (gerilimi) ve LED\u2019in durumunu Tablo 3.8\u2019e yaz\u0131n\u0131z.<\/li>\n
  5. Potansiyometreyle Vref de\u011ferini de\u011fi\u015ftirerek LDR\u2019nin \u0131\u015f\u0131\u011fa verdi\u011fi tepkiyi g\u00f6zlemleyiniz.<\/li>\n<\/ol>\n

     <\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 DE\u011eERLEND\u0130RMELER<\/strong><\/p>\n

    Tablo 3.7: LDR Direncini \u00d6l\u00e7me<\/p>\n\n\n\n\n\n
    LDR<\/strong><\/td>\n\u2126<\/strong><\/td>\n<\/tr>\n
    Ayd\u0131nl\u0131k<\/strong><\/td>\n <\/td>\n<\/tr>\n
    Karanl\u0131k<\/strong><\/td>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

     <\/p>\n

    Tablo 3.8: LDR \u00dczerine D\u00fc\u015fen Gerilim<\/p>\n\n\n\n\n\n
    LDR<\/strong><\/td>\nVg<\/strong><\/td>\nLED (Yan\u0131k\/S\u00f6n\u00fck)<\/strong><\/td>\n<\/tr>\n
    Ayd\u0131nl\u0131k<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n
    Karanl\u0131k<\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u00a0<\/strong><\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SORULAR<\/strong><\/p>\n

      \n
    1. R2 direnci olmasayd\u0131 (k\u0131sa devre olsayd\u0131) Vref en fazla ka\u00e7 Volt olurdu?<\/li>\n
    2. LDR\u2019nin karanl\u0131ktaki direnciyle R1 direnci e\u015fit olursa Vg ka\u00e7 volt olur?<\/li>\n<\/ol>\n

       <\/p>\n

       <\/p>\n\n\n

      Bu senaryolarda, R2 direnci veya LDR’nin karanl\u0131kta direnci ile R1 direnci e\u015fit oldu\u011funda devre \u015fartlar\u0131nda de\u011fi\u015fiklikler olur. S\u00f6z konusu voltajlar form\u00fcllerle hesaplanabilir:<\/p>\n\n\n\n

        \n
      1. R2 direnci olmad\u0131\u011f\u0131nda (k\u0131sa devre oldu\u011funda) Vref en fazla ka\u00e7 Volt olurdu?<\/strong> E\u011fer R2 direnci k\u0131sa devre olsayd\u0131, Vref, potansiyometrenin orta ba\u011flant\u0131 noktas\u0131ndaki gerilim olurdu. Bu durumda Vref, potansiyometrenin b\u00f6lmeyi e\u015fit olarak b\u00f6ld\u00fc\u011f\u00fc bir durumu ifade eder. Vref = (Vcc * R1) \/ (R1 + LDR direnci) Burada, LDR’nin direnci karanl\u0131kta R1 ile e\u015fit oldu\u011fu durumu de\u011ferlendiriyoruz. LDR’nin \u0131\u015f\u0131\u011fa duyarl\u0131 oldu\u011fu ve direncinin de\u011fi\u015fken oldu\u011fu unutulmamal\u0131d\u0131r.<\/li>\n\n\n\n
      2. LDR’nin karanl\u0131ktaki direnci ile R1 direnci e\u015fit oldu\u011funda Vg ka\u00e7 volt olur?<\/strong> LDR’nin karanl\u0131ktaki direnci R1 ile e\u015fit oldu\u011funda, potansiyometrenin orta ba\u011flant\u0131 noktas\u0131ndaki gerilim de\u011fi\u015fecektir. Bu durumda Vg de\u011feri, potansiyometrenin orta ba\u011flant\u0131 noktas\u0131ndaki gerilimi ifade eder. Vg = (Vcc * R1) \/ (R1 + R1) = (Vcc * R1) \/ (2 * R1) = Vcc \/ 2 Yani, LDR’nin direnci karanl\u0131kta R1 ile e\u015fit oldu\u011funda, Vg de\u011feri Vcc’nin yar\u0131s\u0131 olacakt\u0131r. Ancak, LDR’nin \u0131\u015f\u0131\u011fa duyarl\u0131 oldu\u011fu ve direncinin de\u011fi\u015fken oldu\u011fu unutulmamal\u0131d\u0131r; bu durum ger\u00e7ek ortamda farkl\u0131l\u0131k g\u00f6sterebilir.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

        G\u00f6rsel 3.14\u2019te LDR ile yap\u0131lan kar\u015f\u0131la\u015ft\u0131r\u0131c\u0131 g\u00f6r\u00fclmektedir. Potansiyometre ile 3 V\u2019a ayarlanan referans gerilimi eviren u\u00e7tan verilmi\u015ftir. Vg giri\u015f gerilimi, referans gerilimi olan 3 V\u2019un \u00fczerinde oldu\u011funda \u00e7\u0131k\u0131\u015f pozitif, 3 V\u2019un alt\u0131nda oldu\u011funda \u00e7\u0131k\u0131\u015f negatif olur. LDR karanl\u0131k ortamda direnci artt\u0131\u011f\u0131ndan \u00fczerine d\u00fc\u015fen gerilim artar ve referans gerilimi \u00fczerine \u00e7\u0131kt\u0131\u011f\u0131nda \u00e7\u0131k\u0131\u015f pozitif olur ( yakla\u015f\u0131k […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[63,76],"tags":[],"_links":{"self":[{"href":"https:\/\/www.temrinler.com\/index.php?rest_route=\/wp\/v2\/posts\/5651"}],"collection":[{"href":"https:\/\/www.temrinler.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.temrinler.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.temrinler.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.temrinler.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5651"}],"version-history":[{"count":0,"href":"https:\/\/www.temrinler.com\/index.php?rest_route=\/wp\/v2\/posts\/5651\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.temrinler.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5651"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.temrinler.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5651"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.temrinler.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5651"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}