{"id":1246,"date":"2022-09-13T03:59:27","date_gmt":"2022-09-13T03:59:27","guid":{"rendered":"https:\/\/ledask.com\/?p=1246"},"modified":"2022-09-13T13:36:36","modified_gmt":"2022-09-13T13:36:36","slug":"light-sensors","status":"publish","type":"post","link":"https:\/\/ledask.com\/light-sensors\/","title":{"rendered":"Light Sensors \u2013 Working Principles, Types, and Application"},"content":{"rendered":"\n<p>Generally, light <a href=\"https:\/\/www.ourpcb.com\/list-of-sensors.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">sensors<\/a> convert light energy into electrical energy and are applicable in several sectors like smart devices, agriculture, and security.<\/p>\n\n\n\n<p>Today, we will discuss the various types of light sensors and their working principles.&nbsp;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"what-are-light-sensors\"><strong>What are Light Sensors?<\/strong><\/h2>\n\n\n<p>Light sensors are passive photoelectric devices converting <a href=\"https:\/\/en.wikipedia.org\/wiki\/Photon\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">photons<\/a> (light energy like infra-red or visible light) into electrical signals (electrons).&nbsp;<\/p>\n\n\n\n<p>The electrical signal output often indicates the light intensity after measuring the radiant energy in a light spectral range.&nbsp;<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"how-do-light-sensors-work\"><strong>How do Light Sensors Work?<\/strong><\/h2>\n\n\n<p>The working principle for all light sensor types is the generation of voltage\/current in response to an input light energy. However, they notably have different modes of operation.&nbsp;<\/p>\n\n\n\n<p>Now, let&#8217;s see the variety of working principles in specific light sensors in the following section.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"types-of-light-sensors\"><strong>Types of Light Sensors<\/strong><\/h2>\n\n\n<p>They include the following.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"photoresistors-ldr\"><strong>Photoresistors (LDR)<\/strong><\/h3>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/www.wellpcb.com\/wp-content\/uploads\/2022\/04\/1-8.jpg\" alt=\"\" class=\"wp-image-64144\"\/><\/figure><\/div>\n\n\n<p class=\"has-text-align-center\">(photoresistors)<\/p>\n\n\n\n<p>Light-dependent resistors (LDRs) (photoresistors) are the major light sensors applicable in light sensor circuits.&nbsp;<\/p>\n\n\n\n<p>The components that make up photoresistors are <a href=\"https:\/\/en.wikipedia.org\/wiki\/Cadmium_sulfide\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">cadmium sulfide<\/a> cells which are high resistance photoconductive materials. Additionally, the cells have high sensitivity to near-<a href=\"https:\/\/en.wikipedia.org\/wiki\/Infrared\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">infrared<\/a> and visible light.&nbsp;<\/p>\n\n\n<h4 class=\"wp-block-heading\" id=\"working-principlenbsp\"><strong>Working principle <\/strong><\/h4>\n\n\n<p>Often, a photoresistor works similarly to a regular resistor. However, the electrical resistance change in photoresistors depends on the quantity of light exposed to them.&nbsp;<\/p>\n\n\n\n<p>Therefore;&nbsp;<\/p>\n\n\n\n<ul><li>There&#8217;s a higher resistance amongst the cadmium sulfide cells if there&#8217;s low light intensity from a light source. And vice versa.<\/li><\/ul>\n\n\n\n<p>Mostly, you&#8217;ll notice the working principle above in applications like street lamps. In such cases, there&#8217;s lower resistance due to higher light intensity, hence no light production during the day.&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"photodiodes\"><strong>Photodiodes<\/strong><\/h3>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/www.wellpcb.com\/wp-content\/uploads\/2022\/04\/2-9.jpg\" alt=\"photodiode\" class=\"wp-image-64143\"\/><\/figure><\/div>\n\n\n<p class=\"has-text-align-center\">(photodiode)<\/p>\n\n\n\n<p>Photodiodes or photosensors are our second light sensor type.&nbsp;<\/p>\n\n\n\n<p>Unlike photoresistors that work depending on resistance change, photodiodes have a complex adaption to light. They instead change light levels into an electric current flow.&nbsp;<\/p>\n\n\n\n<p>Manufacturers make photodiodes out of germanium and silicon materials. The sensors also have surface areas, built-in lenses, and optical filters.&nbsp;<\/p>\n\n\n<h4 class=\"wp-block-heading\" id=\"working-principlenbsp\"><strong>Working principle <\/strong><\/h4>\n\n\n<p>After a beam of light hits on a photodiode, electrons loosen. Consequently, there&#8217;s the formation of electron holes permitting the flow of electrical current.<\/p>\n\n\n\n<p><strong><em>Note;<\/em><\/strong> The electric current is directly proportional to light brightness. Thus, brighter light culminates in a stronger electric current.<\/p>\n\n\n<h4 class=\"wp-block-heading\" id=\"applicationsnbsp\"><strong>Applications <\/strong><\/h4>\n\n\n<p>Due to its working principle, it mostly suits applications with fast light response changes.&nbsp;<\/p>\n\n\n\n<p>The examples include;<\/p>\n\n\n\n<ul><li>In medical applications like equipment for analysis purposes and measurement.<\/li><li>In consumer electronics such as smoke detector applications and compact disc players.&nbsp;<\/li><li>Solar energy systems like solar panels with solar cells made of <a href=\"https:\/\/en.wikipedia.org\/wiki\/Polycrystalline_silicon\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">polycrystalline silicon<\/a> to power homes and road signs.&nbsp;<\/li><\/ul>\n\n\n<h3 class=\"wp-block-heading\" id=\"phototransistors\"><strong>Phototransistors<\/strong><\/h3>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/www.wellpcb.com\/wp-content\/uploads\/2022\/04\/3-9.jpg\" alt=\"voltage phototransistor\" class=\"wp-image-64142\"\/><\/figure><\/div>\n\n\n<p class=\"has-text-align-center\">(voltage phototransistor)<\/p>\n\n\n\n<p>Ideally, a phototransistor is an amplifier and a photodiode with a current gain. The amplifier is a bipolar NPN transistor having a large electrically unconnected base region. But, some may have the electrical connection to regulate light sensitivity. Moreover, the outer casing of most phototransistors has a clear lens or is transparent to concentrate light on the base junction.&nbsp;<\/p>\n\n\n\n<p>The additional amplification results in higher light sensitivity (up to 50 or 100 times) in phototransistors. However, compared to photodiodes, its sensitivity to a low level of light is wanting.<\/p>\n\n\n\n<p>Its <a href=\"https:\/\/www.youtube.com\/watch?v=kl_4Cl-ckok\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">working principle<\/a> is similar to that of a photodiode.&nbsp;<\/p>\n\n\n\n<p><strong>Applications<\/strong> are in TV-type remote control, light beam sensors, and <a href=\"https:\/\/en.wikipedia.org\/wiki\/Opto-isolator\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">optoisolators<\/a>.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/q_qW8VF1_gs6nHrq3LOIkCkt09bdkeXbmpi-cIHkNR8JvkpRwrJoA-GlHOu9AoiSvP5To50MDoehnrER7wihkGyslNmWp5jWZrEGr9gzkYriI468jr5TTlDDEX_1uEzN739pyvN6Fnhu4Nfw2A\" alt=\"Circuit diagram of an optoisolator&#xA0;&#xA0;\"\/><\/figure><\/div>\n\n\n<p class=\"has-text-align-center\"><strong><em>Circuit diagram of an optoisolator&nbsp;&nbsp;<\/em><\/strong><\/p>\n\n\n\n<p><strong><em>Source; <\/em><\/strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/File:Optoisolator_Pinout.svg\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong><em>Wikipedia<\/em><\/strong><\/a>&nbsp;<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"how-to-use-a-light-sensor-with-arduino\"><strong>How to use a light sensor with Arduino?<\/strong><\/h3>\n\n\n<p>We will show you how to incorporate a light sensor with an Arduino.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/www.wellpcb.com\/wp-content\/uploads\/2022\/04\/4-5.jpg\" alt=\"photo CMOS sensor and LCD screen\" class=\"wp-image-64141\"\/><\/figure><\/div>\n\n\n<p class=\"has-text-align-center\">(photo CMOS sensor and LCD screen)<\/p>\n\n\n<h4 class=\"wp-block-heading\" id=\"components-needednbsp\"><strong>Components needed <\/strong><\/h4>\n\n\n<ul><li>Arduino board<\/li><li>Grove base shield<\/li><li>Grove-LED bar<\/li><li>Grove-light sensor&nbsp;<\/li><\/ul>\n\n\n<h4 class=\"wp-block-heading\" id=\"hardware-steps-to-follow-for-the-light-sensor-circuitnbsp\"><strong>Hardware steps to follow for the light sensor circuit <\/strong><\/h4>\n\n\n<ul><li>Start by connecting the grove-light sensor to the grove-base shield AO port.<\/li><li>Then, connect the grove-LED bar to the grove base-shield D2 port. You can also connect your grove-light sensor directly to the Arduino board.&nbsp;<\/li><\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/www.wellpcb.com\/wp-content\/uploads\/2022\/04\/5-2.jpg\" alt=\"Arduino board\" class=\"wp-image-64140\"\/><\/figure><\/div>\n\n\n<p class=\"has-text-align-center\">(Arduino board)<\/p>\n\n\n\n<ul><li>Thirdly, plug your grove-base <a href=\"https:\/\/www.wellpcb.com\/news\/screw-shield-designed-arduino.html\" target=\"_blank\" rel=\"noopener\">shield into the Arduino<\/a>.<\/li><li>Finally, use a USB cable to connect the Arduino to a PC.&nbsp;<\/li><\/ul>\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\"><strong>Conclusion<\/strong><\/h2>\n\n\n<p>Light sensors are passive devices that have improved living standards since they have many applications. That&#8217;s all we have today for light sensing. If you need clarifications, you can always <a href=\"https:\/\/ledask.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">contact us.<\/a>&nbsp;<\/p>\n<!-- Ezoic - wp_native_bottom - native_bottom --><div id=\"ezoic-pub-ad-placeholder-167\" data-inserter-version=\"-1\"><\/div><!-- End Ezoic - wp_native_bottom - native_bottom -->","protected":false},"excerpt":{"rendered":"<p> &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Light Sensors \u2013 Working Principles, Types, and Application\" class=\"read-more button\" href=\"https:\/\/ledask.com\/light-sensors\/#more-1246\" aria-label=\"More on Light Sensors \u2013 Working Principles, Types, and Application\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":1247,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Light Sensors \u2013 Working Principles, Types, and Application<\/title>\n<meta name=\"description\" content=\"Generally, light sensors convert light energy into electrical energy and are applicable in several sectors like smart devices, agriculture, and security.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ledask.com\/light-sensors\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Light Sensors \u2013 Working Principles, Types, and Application\" \/>\n<meta property=\"og:description\" content=\"Generally, light sensors convert light energy into electrical energy and are applicable in several sectors like smart devices, agriculture, and security.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ledask.com\/light-sensors\/\" \/>\n<meta property=\"og:site_name\" content=\"LEDask.com: A Blog about LED and Green Energy in General\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-13T03:59:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-09-13T13:36:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"400\" \/>\n\t<meta property=\"og:image:height\" content=\"267\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Adelaide Brown\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Adelaide Brown\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/ledask.com\/light-sensors\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/ledask.com\/light-sensors\/\"},\"author\":{\"name\":\"Adelaide Brown\",\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/2b7bac4fe53f823c46485844f3fa58d2\"},\"headline\":\"Light Sensors \u2013 Working Principles, Types, and Application\",\"datePublished\":\"2022-09-13T03:59:27+00:00\",\"dateModified\":\"2022-09-13T13:36:36+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/ledask.com\/light-sensors\/\"},\"wordCount\":712,\"publisher\":{\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2\"},\"image\":{\"@id\":\"https:\/\/ledask.com\/light-sensors\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg\",\"articleSection\":[\"How\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/ledask.com\/light-sensors\/\",\"url\":\"https:\/\/ledask.com\/light-sensors\/\",\"name\":\"Light Sensors \u2013 Working Principles, Types, and Application\",\"isPartOf\":{\"@id\":\"https:\/\/ledask.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/ledask.com\/light-sensors\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/ledask.com\/light-sensors\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg\",\"datePublished\":\"2022-09-13T03:59:27+00:00\",\"dateModified\":\"2022-09-13T13:36:36+00:00\",\"description\":\"Generally, light sensors convert light energy into electrical energy and are applicable in several sectors like smart devices, agriculture, and security.\",\"breadcrumb\":{\"@id\":\"https:\/\/ledask.com\/light-sensors\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/ledask.com\/light-sensors\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/ledask.com\/light-sensors\/#primaryimage\",\"url\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg\",\"contentUrl\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg\",\"width\":400,\"height\":267,\"caption\":\"home security light\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/ledask.com\/light-sensors\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ledask.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Light Sensors \u2013 Working Principles, Types, and Application\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/ledask.com\/#website\",\"url\":\"https:\/\/ledask.com\/\",\"name\":\"LEDask.com: A Blog about LED and Green Energy in General\",\"description\":\"A Blog about LED and Green Energy in General\",\"publisher\":{\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/ledask.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2\",\"name\":\"Bob Smith\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-350-70.png\",\"contentUrl\":\"https:\/\/ledask.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-350-70.png\",\"width\":350,\"height\":70,\"caption\":\"Bob Smith\"},\"logo\":{\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/image\/\"},\"sameAs\":[\"https:\/\/ledask.com\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/2b7bac4fe53f823c46485844f3fa58d2\",\"name\":\"Adelaide Brown\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/ledask.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/305605b01c02b9eab3717b67a991d71e?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/305605b01c02b9eab3717b67a991d71e?s=96&d=mm&r=g\",\"caption\":\"Adelaide Brown\"},\"url\":\"https:\/\/ledask.com\/author\/adelaide-zhu\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Light Sensors \u2013 Working Principles, Types, and Application","description":"Generally, light sensors convert light energy into electrical energy and are applicable in several sectors like smart devices, agriculture, and security.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ledask.com\/light-sensors\/","og_locale":"en_US","og_type":"article","og_title":"Light Sensors \u2013 Working Principles, Types, and Application","og_description":"Generally, light sensors convert light energy into electrical energy and are applicable in several sectors like smart devices, agriculture, and security.","og_url":"https:\/\/ledask.com\/light-sensors\/","og_site_name":"LEDask.com: A Blog about LED and Green Energy in General","article_published_time":"2022-09-13T03:59:27+00:00","article_modified_time":"2022-09-13T13:36:36+00:00","og_image":[{"width":400,"height":267,"url":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg","type":"image\/jpeg"}],"author":"Adelaide Brown","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Adelaide Brown","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/ledask.com\/light-sensors\/#article","isPartOf":{"@id":"https:\/\/ledask.com\/light-sensors\/"},"author":{"name":"Adelaide Brown","@id":"https:\/\/ledask.com\/#\/schema\/person\/2b7bac4fe53f823c46485844f3fa58d2"},"headline":"Light Sensors \u2013 Working Principles, Types, and Application","datePublished":"2022-09-13T03:59:27+00:00","dateModified":"2022-09-13T13:36:36+00:00","mainEntityOfPage":{"@id":"https:\/\/ledask.com\/light-sensors\/"},"wordCount":712,"publisher":{"@id":"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2"},"image":{"@id":"https:\/\/ledask.com\/light-sensors\/#primaryimage"},"thumbnailUrl":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg","articleSection":["How"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/ledask.com\/light-sensors\/","url":"https:\/\/ledask.com\/light-sensors\/","name":"Light Sensors \u2013 Working Principles, Types, and Application","isPartOf":{"@id":"https:\/\/ledask.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/ledask.com\/light-sensors\/#primaryimage"},"image":{"@id":"https:\/\/ledask.com\/light-sensors\/#primaryimage"},"thumbnailUrl":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg","datePublished":"2022-09-13T03:59:27+00:00","dateModified":"2022-09-13T13:36:36+00:00","description":"Generally, light sensors convert light energy into electrical energy and are applicable in several sectors like smart devices, agriculture, and security.","breadcrumb":{"@id":"https:\/\/ledask.com\/light-sensors\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/ledask.com\/light-sensors\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ledask.com\/light-sensors\/#primaryimage","url":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg","contentUrl":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/09\/0-12.jpg","width":400,"height":267,"caption":"home security light"},{"@type":"BreadcrumbList","@id":"https:\/\/ledask.com\/light-sensors\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/ledask.com\/"},{"@type":"ListItem","position":2,"name":"Light Sensors \u2013 Working Principles, Types, and Application"}]},{"@type":"WebSite","@id":"https:\/\/ledask.com\/#website","url":"https:\/\/ledask.com\/","name":"LEDask.com: A Blog about LED and Green Energy in General","description":"A Blog about LED and Green Energy in General","publisher":{"@id":"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/ledask.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":["Person","Organization"],"@id":"https:\/\/ledask.com\/#\/schema\/person\/db8ee36df6c577c94349942caa1a52d2","name":"Bob Smith","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ledask.com\/#\/schema\/person\/image\/","url":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-350-70.png","contentUrl":"https:\/\/ledask.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-350-70.png","width":350,"height":70,"caption":"Bob Smith"},"logo":{"@id":"https:\/\/ledask.com\/#\/schema\/person\/image\/"},"sameAs":["https:\/\/ledask.com"]},{"@type":"Person","@id":"https:\/\/ledask.com\/#\/schema\/person\/2b7bac4fe53f823c46485844f3fa58d2","name":"Adelaide Brown","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ledask.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/305605b01c02b9eab3717b67a991d71e?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/305605b01c02b9eab3717b67a991d71e?s=96&d=mm&r=g","caption":"Adelaide Brown"},"url":"https:\/\/ledask.com\/author\/adelaide-zhu\/"}]}},"_links":{"self":[{"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/posts\/1246"}],"collection":[{"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/comments?post=1246"}],"version-history":[{"count":2,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/posts\/1246\/revisions"}],"predecessor-version":[{"id":1337,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/posts\/1246\/revisions\/1337"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/media\/1247"}],"wp:attachment":[{"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/media?parent=1246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/categories?post=1246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ledask.com\/wp-json\/wp\/v2\/tags?post=1246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}