{"id":10643,"date":"2020-11-25T15:25:35","date_gmt":"2020-11-25T04:25:35","guid":{"rendered":"http:\/\/149.28.167.216\/?post_type=peripheral&#038;p=10643"},"modified":"2022-07-10T10:29:28","modified_gmt":"2022-07-10T00:29:28","slug":"ds18b20","status":"publish","type":"peripheral","link":"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/","title":{"rendered":"DS18B20"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-662da59d88d51\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-662da59d88d51\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#Specification\" title=\"Specification\">Specification<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#Demonstration\" title=\"Demonstration\">Demonstration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#How_it_Works\" title=\"How it Works\">How it Works<\/a><ul class='ez-toc-list-level-5' ><li class='ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#Sensing_Element\" title=\"Sensing Element\">Sensing Element<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#The_electronic_circuits_inside_the_steel_tube\" title=\"The electronic circuits inside the steel tube\">The electronic circuits inside the steel tube<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#Wire_connections\" title=\"Wire connections\">Wire connections<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p data-renderer-start-pos=\"1\">This is a waterproofed version of the DS18B20 temperature sensor. It is an <strong>INPUT<\/strong> device.<\/p>\n<p data-renderer-start-pos=\"1\">Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125\u00b0C the cable is jacketed in PVC so we suggest keeping it under 100\u00b0C.<\/p>\n<p data-pm-slice=\"1 1 []\">It is a <strong>hybrid analogue\/digital device<\/strong> as the analogue temperature reading is sampled within the probe head and transmitted digitally to the Kookaberry.<\/p>\n<p data-renderer-start-pos=\"1\">This is the only peripheral in the Journey Class Kit that is not sourced from DFRobot.<\/p>\n<h4 id=\"Specification\" data-renderer-start-pos=\"250\"><span class=\"ez-toc-section\" id=\"Specification\"><\/span>Specification<button class=\"sc-jGxEUC bhvqXL\"><\/button><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul class=\"ak-ul\" data-indent-level=\"1\">\n<li>\n<p data-renderer-start-pos=\"267\">Usable with 3.0V to 5.5V input<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"306\">\u00b10.5\u00b0C Accuracy from -10\u00b0C to +85\u00b0C<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"345\">Usable temperature range: -55 to 125\u00b0C (-67\u00b0F to +257\u00b0F)<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"405\">9 to 12 bit selectable resolution<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"442\">Uses 1-Wire interface- requires only one digital pin for communication<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"516\">Multiple sensors can share one pin<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"554\">Temperature-limit alarm system<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"588\">Query time is less than 750ms<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"621\">Interface is jst 3wire PHR-3 wired as shown below<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"674\">Stainless steel tube 6mm diameter by 50mm long<\/p>\n<\/li>\n<li>\n<p data-renderer-start-pos=\"724\">Length: 100cm<\/p>\n<\/li>\n<\/ul>\n<h4 data-renderer-start-pos=\"741\"><span class=\"ez-toc-section\" id=\"Demonstration\"><\/span>Demonstration<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Go to the preloaded <a href=\"https:\/\/learn.auststem.com.au\/app\/senseds18\/\" target=\"_blank\" rel=\"noopener\">SenseDS18B20<\/a> app to\u00a0 demonstrate sensor operation.<\/p>\n<p>Alternatively, create your own simple KookaBlockly app. Connect a Kookaberry to a PC or Mac, and plug the DS18B20 sensor into socket P1 on the Kookaberry.<\/p>\n<p>Open KookaBlockly and create the programme shown below to display the sensed temperature on the Kookaberry&#8217;s screen. The &#8220;Press Button B to Exit&#8221; code has been added if you wish to save the programme to your Kookaberry and access it from the screen menu. Remember to save is [Title].kby.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-12793\" src=\"https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Combined-script-screen.png\" alt=\"\" width=\"732\" height=\"374\" srcset=\"https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Combined-script-screen.png 955w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Combined-script-screen-300x153.png 300w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Combined-script-screen-768x392.png 768w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Combined-script-screen-500x255.png 500w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Combined-script-screen-100x51.png 100w\" sizes=\"(max-width: 732px) 100vw, 732px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h4 id=\"How-it-Works\" data-renderer-start-pos=\"741\"><span class=\"ez-toc-section\" id=\"How_it_Works\"><\/span>How it Works<button class=\"sc-jGxEUC bhvqXL\"><\/button><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h5 id=\"Sensing-Element\" data-renderer-start-pos=\"755\"><span class=\"ez-toc-section\" id=\"Sensing_Element\"><\/span>Sensing Element<button class=\"sc-jGxEUC bhvqXL\"><\/button><span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p data-renderer-start-pos=\"772\">The sensing element within the steel tube is a semiconductor that decreases in resistance when exposed to heat.<\/p>\n<p data-renderer-start-pos=\"772\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-10647\" src=\"http:\/\/kookaberry.auststem.com.au\/wp-content\/uploads\/2020\/11\/Semiconductor-300x138.png\" alt=\"\" width=\"300\" height=\"138\" srcset=\"https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Semiconductor-300x138.png 300w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Semiconductor-768x352.png 768w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Semiconductor-500x229.png 500w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Semiconductor-100x46.png 100w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/Semiconductor.png 959w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p data-renderer-start-pos=\"889\">It is called a Negative Temperature Coefficient (NTC) device because normal materials increase in resistance as they are heated.<\/p>\n<p data-renderer-start-pos=\"1020\">Most conductors will increase in resistance the hotter they become, that\u2019s typical of metals. This occurs because as the atoms and molecules become excited they move around, so it\u2019s harder for the free electrons to get through without a collision. <em data-renderer-mark=\"true\">[Thanks to <\/em><a class=\"sc-jxGEyO eZpnmL\" title=\"http:\/\/TheEngineeringMindset.com\" href=\"http:\/\/theengineeringmindset.com\/\" data-renderer-mark=\"true\"><em data-renderer-mark=\"true\">TheEngineeringMindset.com<\/em><\/a><em data-renderer-mark=\"true\"> for this explanation and the accompanying video]<\/em><\/p>\n<p data-renderer-start-pos=\"1355\">The following video tutorial explains all the different types of electrical temperature devices &#8211; including the NTC ones<\/p>\n<div class=\"x-resp-embed x-is-video x-is-youtube\"><iframe loading=\"lazy\" title=\"Temperature Sensors Explained\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/w3Hfj2kMrGo?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\n<h5 id=\"The-electronic-circuits-inside-the-steel-tube\" data-renderer-start-pos=\"1478\"><span class=\"ez-toc-section\" id=\"The_electronic_circuits_inside_the_steel_tube\"><\/span>The electronic circuits inside the steel tube<button class=\"sc-jGxEUC bhvqXL\"><\/button><span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p data-renderer-start-pos=\"1525\">This is a digital sensor, which means that the variation in resistance in the presence of heat is sampled and turned into a digital signal by electronic circuits within the tube containing the NTC sensor.<\/p>\n<p data-renderer-start-pos=\"1731\">Because the signal is digital, you don&#8217;t get any signal degradation even over long distances. The DS18B20 provides 9 to 12-bit (configurable) temperature readings over a 1-Wire interface.<\/p>\n<p data-renderer-start-pos=\"1920\">The DS18B20 can be powered with only two wires (using what is called parasitic powering) but we feed power from the Kookaberry board to the sensor over two wires (Black and Red), and bring the signal back over a single wire (Yellow).<\/p>\n<h5 id=\"Wire-connections\" data-renderer-start-pos=\"2155\"><span class=\"ez-toc-section\" id=\"Wire_connections\"><\/span>Wire connections<button class=\"sc-jGxEUC bhvqXL\"><\/button><span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p data-renderer-start-pos=\"2173\">Power is supplied via the Black(Ground) and 3 volt VDD(Red) from the Kookaberry board. The digital signal from the sensor travels on the Signal(Yellow) lead<\/p>\n<p data-renderer-start-pos=\"2173\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-10649\" src=\"http:\/\/kookaberry.auststem.com.au\/wp-content\/uploads\/2020\/11\/small-connection-diagram-300x153.png\" alt=\"\" width=\"300\" height=\"153\" srcset=\"https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/small-connection-diagram-300x153.png 300w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/small-connection-diagram-500x255.png 500w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/small-connection-diagram-100x51.png 100w, https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/small-connection-diagram.png 685w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p data-renderer-start-pos=\"2173\">\n","protected":false},"excerpt":{"rendered":"<p>This is a waterproofed version of the DS18B20 temperature sensor. It is an INPUT device. Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125\u00b0C the cable is jacketed in PVC so we suggest keeping it under 100\u00b0C. It is a hybrid analogue\/digital device as the analogue temperature &#8230; <\/p>\n<div><a href=\"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/\" class=\"more-link\">Read More<\/a><\/div>\n","protected":false},"featured_media":10627,"menu_order":0,"template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"peripheral-type":[7599,7675,7600],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>DS18B20 - AustSTEM Digital Learning Hub<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DS18B20 - AustSTEM Digital Learning Hub\" \/>\n<meta property=\"og:description\" content=\"This is a waterproofed version of the DS18B20 temperature sensor. It is an INPUT device. Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125\u00b0C the cable is jacketed in PVC so we suggest keeping it under 100\u00b0C. It is a hybrid analogue\/digital device as the analogue temperature ... 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It is an INPUT device. Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125\u00b0C the cable is jacketed in PVC so we suggest keeping it under 100\u00b0C. It is a hybrid analogue\/digital device as the analogue temperature ... Read More","og_url":"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/","og_site_name":"AustSTEM Digital Learning Hub","article_modified_time":"2022-07-10T00:29:28+00:00","og_image":[{"width":600,"height":496,"url":"https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/probes-e1606107323387.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/","url":"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/","name":"DS18B20 - AustSTEM Digital Learning Hub","isPartOf":{"@id":"https:\/\/learn.auststem.com.au\/#website"},"primaryImageOfPage":{"@id":"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#primaryimage"},"image":{"@id":"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#primaryimage"},"thumbnailUrl":"https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/probes-e1606107323387.png","datePublished":"2020-11-25T04:25:35+00:00","dateModified":"2022-07-10T00:29:28+00:00","breadcrumb":{"@id":"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#breadcrumb"},"inLanguage":"en-AU","potentialAction":[{"@type":"ReadAction","target":["https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/"]}]},{"@type":"ImageObject","inLanguage":"en-AU","@id":"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#primaryimage","url":"https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/probes-e1606107323387.png","contentUrl":"https:\/\/learn.auststem.com.au\/wp-content\/uploads\/2020\/11\/probes-e1606107323387.png","width":600,"height":496},{"@type":"BreadcrumbList","@id":"https:\/\/learn.auststem.com.au\/peripheral\/ds18b20\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/learn.auststem.com.au\/"},{"@type":"ListItem","position":2,"name":"Peripherals","item":"https:\/\/learn.auststem.com.au\/peripheral\/"},{"@type":"ListItem","position":3,"name":"DS18B20"}]},{"@type":"WebSite","@id":"https:\/\/learn.auststem.com.au\/#website","url":"https:\/\/learn.auststem.com.au\/","name":"AustSTEM Digital Learning Hub","description":"Support and database for Digital Technologies","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/learn.auststem.com.au\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-AU"}]}},"_links":{"self":[{"href":"https:\/\/learn.auststem.com.au\/wp-json\/wp\/v2\/peripheral\/10643"}],"collection":[{"href":"https:\/\/learn.auststem.com.au\/wp-json\/wp\/v2\/peripheral"}],"about":[{"href":"https:\/\/learn.auststem.com.au\/wp-json\/wp\/v2\/types\/peripheral"}],"version-history":[{"count":8,"href":"https:\/\/learn.auststem.com.au\/wp-json\/wp\/v2\/peripheral\/10643\/revisions"}],"predecessor-version":[{"id":12794,"href":"https:\/\/learn.auststem.com.au\/wp-json\/wp\/v2\/peripheral\/10643\/revisions\/12794"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/learn.auststem.com.au\/wp-json\/wp\/v2\/media\/10627"}],"wp:attachment":[{"href":"https:\/\/learn.auststem.com.au\/wp-json\/wp\/v2\/media?parent=10643"}],"wp:term":[{"taxonomy":"peripheral-type","embeddable":true,"href":"https:\/\/learn.auststem.com.au\/wp-json\/wp\/v2\/peripheral-type?post=10643"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}