{"id":70,"date":"2024-04-04T03:04:48","date_gmt":"2024-04-04T00:04:48","guid":{"rendered":"https:\/\/sisu.ut.ee\/elektroonika\/85-ir-led-ja-fototransistor\/"},"modified":"2024-04-04T03:05:53","modified_gmt":"2024-04-04T00:05:53","slug":"85-ir-led-ja-fototransistor","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/elektroonika\/85-ir-led-ja-fototransistor\/","title":{"rendered":"8.5. IR LED ja fototransistor"},"content":{"rendered":"<p>Selles loengus uurime fototransistori, mis tunneb ainult inimsilmale n\u00e4htamatut infrapunakiirgust ning valgusdioodi, mis kiirgab niisugust kiirgust. N\u00e4itame \u00fche lihtsa n\u00f5ksu, kuidas n\u00e4htamatut infrapunakiirgust n\u00e4ha.<\/p>\n<p style=\"text-align: center\"><\/p><div class=\"ratio ratio-16x9 mb-3\"><div class=\"video-placeholder-wrapper video-placeholder-wrapper--16x9\">\n\t\t\t    <div class=\"video-placeholder d-flex justify-content-center align-items-center\">\n\t\t\t        <div class=\"overlay text-white p-2 w-100 text-center d-block justify-content-center align-items-center\">\n\t\t\t            <div>Kolmandate osapoolte sisu n\u00e4gemiseks palun n\u00f5ustu k\u00fcpsistega.<\/div>\n\t\t\t            <button class=\"btn btn-secondary btn-sm mt-1 consent-change\">Muuda n\u00f5usolekut<\/button>\n\t\t\t        <\/div>\n\t\t\t    <\/div>\n\t\t\t<\/div>\n<\/div>\n<p style=\"text-align: center\"><a href=\"https:\/\/youtu.be\/l8_rOLwlbD4\" target=\"_blank\" rel=\"noopener\">https:\/\/youtu.be\/l8_rOLwlbD4<\/a><\/p>\n<p>\u00a0<\/p>\n<p>Praktilise t\u00f6\u00f6 jaoks vajad j\u00e4rgmisi vahendeid:<\/p>\n<ul>\n<li>multimeeter<\/li>\n<li>makettplaat<\/li>\n<li>6V vooluallikas<\/li>\n<li>infrapuna valgusdiood<\/li>\n<li>infrapuna fototransistor<\/li>\n<li>takistid<\/li>\n<li>juhtmed<\/li>\n<li>valgusdioodid<\/li>\n<\/ul>\n<h5><img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"40\" class=\"alignnone wp-image-77\" style=\"margin-left: 10px;margin-right: 10px\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/189\/motle.png\" title=\"motle.png\" alt=\"motle.png\">\u00a0M\u00f5tle kaasa!<\/h5>\n<p>Kui suur on selles videos infrapuna valgusdioodi l\u00e4biva voolu tugevus?<\/p>\n<p><\/p><div class=\"accordion mb-3\">\n        <div class=\"accordion-item accordion-item--white\">\n        <h2 class=\"accordion-header\" id=\"accordion-69d5f07eeeb6c-heading\">\n            <button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#accordion-69d5f07eeeb6c-collapse\" aria-expanded=\"true\" aria-controls=\"accordion-69d5f07eeeb6c-collapse\">Vastus<\/button>\n        <\/h2>\n        <div id=\"accordion-69d5f07eeeb6c-collapse\" class=\"accordion-collapse collapse\" aria-labelledby=\"accordion-69d5f07eeeb6c-heading\">\n            <div class=\"accordion-body\">\n<p>Ajavahemikus umbes 1:10 \u2026 1:40 m\u00f5\u00f5detakse pinget infrapuna valgusdioodiga jadamisi oleval 100\u2126 takistil. Kui pinge on 4,4V, siis voolutugevus on Ohmi seaduse j\u00e4rgi <span style=\"color: #008000\"><strong>44 mA<\/strong><\/span>.<\/p>\n<p><\/p><\/div>\n        <\/div>\n        <\/div>\n    <\/div>\n\n<h5><img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"40\" class=\"alignnone wp-image-77\" style=\"margin-left: 10px;margin-right: 10px\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/189\/motle.png\" title=\"motle.png\" alt=\"motle.png\">\u00a0M\u00f5tle kaasa!<\/h5>\n<p><span>Video l\u00f5pus on KODUNE \u00dcLESANNE. See on selles kursuses kaasam\u00f5tlemise \u00fclesanne.<\/span><\/p>\n<p><span>Videos on nii, et valgusdiood p\u00f5leb siis, kui fototransistorile paistab\u00a0<\/span><span>infrapunane valgus. Muuda seda skeemi nii, et valgusdiood p\u00f5leb siis, <\/span><span>kui fototransistorile valgus ei paista.<\/span><\/p>\n<p><\/p><div class=\"accordion mb-3\">\n        <div class=\"accordion-item accordion-item--white\">\n        <h2 class=\"accordion-header\" id=\"accordion-69d5f07eeeb72-heading\">\n            <button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#accordion-69d5f07eeeb72-collapse\" aria-expanded=\"true\" aria-controls=\"accordion-69d5f07eeeb72-collapse\">Vastus<\/button>\n        <\/h2>\n        <div id=\"accordion-69d5f07eeeb72-collapse\" class=\"accordion-collapse collapse\" aria-labelledby=\"accordion-69d5f07eeeb72-heading\">\n            <div class=\"accordion-body\">\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=go8vhDtcQ14&amp;feature=youtu.be\" target=\"_blank\" rel=\"noopener\">Videos 8.1.<\/a> \u00fchendasime fototakistit algul valgusdioodiga jadamisi ja siis paralleelselt. \u00dclesande lahendamiseks tuleb sarnaselt \u00fchendada fototransistor valgusdioodiga paralleelselt. Sel juhul on nii, et kui fototransistorile valgus ei paista, on tema takistus suur ja ta ei m\u00f5juta valgusdioodi. Kui fototransistorile valgus paistab, siis ta juhib voolu h\u00e4sti ning l\u00fchistab valgusdioodi. Kuna valgusdioodile ei j\u00e4tku k\u00fcllalt pinget, siis ta ei p\u00f5le.<\/p>\n<p><\/p><\/div>\n        <\/div>\n        <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Selles loengus uurime fototransistori, mis tunneb ainult inimsilmale n\u00e4htamatut infrapunakiirgust ning valgusdioodi, mis kiirgab niisugust kiirgust. N\u00e4itame \u00fche lihtsa n\u00f5ksu, kuidas n\u00e4htamatut infrapunakiirgust n\u00e4ha. Kolmandate osapoolte sisu n\u00e4gemiseks palun n\u00f5ustu k\u00fcpsistega. Muuda n\u00f5usolekut https:\/\/youtu.be\/l8_rOLwlbD4 \u00a0 Praktilise t\u00f6\u00f6 jaoks vajad j\u00e4rgmisi &#8230;<\/p>\n","protected":false},"author":93,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-70","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/70","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/users\/93"}],"replies":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/comments?post=70"}],"version-history":[{"count":1,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/70\/revisions"}],"predecessor-version":[{"id":212,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/70\/revisions\/212"}],"wp:attachment":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/media?parent=70"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}