{"id":6967,"date":"2022-02-17T12:58:19","date_gmt":"2022-02-17T19:58:19","guid":{"rendered":"https:\/\/www.circuitspecialists.com\/blog\/?p=6967"},"modified":"2022-02-21T12:41:12","modified_gmt":"2022-02-21T19:41:12","slug":"model-traffic-lights-on-pbb-272b","status":"publish","type":"post","link":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/","title":{"rendered":"Model Traffic Lights on PBB-272B"},"content":{"rendered":"\n<p>Let&#8217;s take it back to basic by modeling the traffic lights circuit on a  <a href=\"https:\/\/www.circuitspecialists.com\/powered-protoboard-system-with-two-led-digital-panel-meters.html\" target=\"_blank\" rel=\"noreferrer noopener\">Powered Breadboard PBB-272B<\/a> and with a few other electronics components. This circuit turns ON the green LED, keeps it ON for some time, then turns ON the yellow LED for a moment, and finally turns ON the red LED for almost the same duration as the green LED. This cycle again starts from the green LED.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><a href=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/pbb-272b-2-e1644959945694.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/pbb-272b-2-e1644959945694.jpg\" alt=\"\" class=\"wp-image-6970\" width=\"520\" height=\"644\" srcset=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/pbb-272b-2-e1644959945694.jpg 747w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/pbb-272b-2-e1644959945694-242x300.jpg 242w\" sizes=\"auto, (max-width: 520px) 100vw, 520px\" \/><\/a><figcaption>PBB-272B &nbsp;Powered Solderless Breadboard Kit for Prototyping<\/figcaption><\/figure><\/div>\n\n\n\n<p>We are going to use the <a href=\"https:\/\/www.circuitspecialists.com\/powered-protoboard-system-with-two-led-digital-panel-meters.html\" target=\"_blank\" rel=\"noreferrer noopener\">Power Breadboard PBB-272B<\/a> to help us with this project. The PBB-272B is a very useful tool that any <a href=\"https:\/\/make.co\/\" target=\"_blank\" rel=\"noreferrer noopener\">Makers<\/a>, Circuit Board designer, and college labs should have for prototyping. The PBB-272B provides a 0 to 15V output port tight on top for easy access and a large readout with high-level accuracy for what it is. Furthermore, the unit also provides 0 to -15V for the experiment that requires a stable negative voltage.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"table-of-content\">Table of Content<\/h5>\n\n\n\n<ul class=\"wp-block-list\"><li>Part List<\/li><li>Circuit Diagram<\/li><li>How This Circuit Works<\/li><li>Logic Break Down<\/li><li>Conclusion<\/li><\/ul>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"part-list\">Part List<\/h5>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><a href=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4591-scaled-e1645127415910.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4591-scaled-e1645127415910-1024x992.jpg\" alt=\"\" class=\"wp-image-6983\" width=\"661\" height=\"640\" srcset=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4591-scaled-e1645127415910-1024x992.jpg 1024w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4591-scaled-e1645127415910-300x291.jpg 300w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4591-scaled-e1645127415910-768x744.jpg 768w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4591-scaled-e1645127415910-1536x1488.jpg 1536w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4591-scaled-e1645127415910-2048x1984.jpg 2048w\" sizes=\"auto, (max-width: 661px) 100vw, 661px\" \/><\/a><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.circuitspecialists.com\/traffic-light-555-timer-kit.html\" target=\"_blank\" rel=\"noreferrer noopener\">Traffic Light kit<\/a>  Or<ul><li>2 x 555 Timer ICs<\/li><li>LEDs: 1 Red, 1 Yellow, 1 Green<\/li><li>Resistors: 100K, 47K, 470R, 2*220R<\/li><\/ul><ul><li>Capacitors: 2 x 100uF<\/li><\/ul><\/li><li><a href=\"https:\/\/www.circuitspecialists.com\/powered-protoboard-system-with-two-led-digital-panel-meters.html\" target=\"_blank\" rel=\"noreferrer noopener\">Power Breadboard PBB-272B<\/a><\/li><li><a href=\"https:\/\/www.circuitspecialists.com\/wk-1.html\" target=\"_blank\" rel=\"noreferrer noopener\">Wire Jumper Kit<\/a><\/li><\/ul>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"circuit-diagram\">Circuit Diagram<\/h5>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><a href=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/TrafficLights-1-1.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/TrafficLights-1-1.jpg\" alt=\"\" class=\"wp-image-6969\" width=\"671\" height=\"418\" srcset=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/TrafficLights-1-1.jpg 385w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/TrafficLights-1-1-300x187.jpg 300w\" sizes=\"auto, (max-width: 671px) 100vw, 671px\" \/><\/a><figcaption><a href=\"https:\/\/www.circuitspecialists.com\/traffic-light-555-timer-kit.html\" target=\"_blank\" rel=\"noreferrer noopener\">Traffic Light Kit <\/a><\/figcaption><\/figure><\/div>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"how-this-circuit-works\">How This Circuit Works?<\/h5>\n\n\n\n<p>Here we have used two such astable circuits with the first astable circuit powering the other. So the second 555 timer IC will be powered only if the output of the first 555 timers IC is ON.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Build Traffic Light Circuit in less than 15 seconds !\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/KApbT_uSsk0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>The red LED is connected such that it turns ON only if the output of the first 555 timers IC is at 0V. This is because the other terminal of the red LED is connected to positive voltage. Yellow LED turns ON during discharge mode of second 555 IC, and the green LED turns ON whenever the output of second 555 timer IC is at positive voltage.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"logic-break-down\">Logic Break Down<\/h5>\n\n\n\n<p>Immediately after we power ON this circuit, the output of the first 555 timer IC will be in ON state because the voltage at PIN-3 (Trigger Pin) is less than 1\/3rd of the supply voltage. The red LED cannot turn ON yet, but the second 555 IC is powered and so the green light turns ON.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><a href=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-1024x768.jpg\" alt=\"\" class=\"wp-image-6973\" width=\"748\" height=\"562\" srcset=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-1024x768.jpg 1024w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-300x225.jpg 300w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-768x576.jpg 768w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-1536x1152.jpg 1536w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 748px) 100vw, 748px\" \/><\/a><figcaption><a href=\"https:\/\/www.circuitspecialists.com\/powered-protoboard-system-with-two-led-digital-panel-meters.html\" target=\"_blank\" rel=\"noreferrer noopener\">PBB-272B &nbsp;Powered Solderless Breadboard Kit for Prototyping<\/a> &#8211; Green Cycle<\/figcaption><\/figure><\/div>\n\n\n\n<p>The capacitor of the 2nd 555 timer IC slowly charges and as soon as it charges to 2\/3rd of the supply voltage (Threshold Voltage), the output of the 2nd 555 IC turns OFF and the yellow LED glows because the discharge pin is activated.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><a href=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4645-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4645-1024x768.jpg\" alt=\"\" class=\"wp-image-6974\" width=\"806\" height=\"605\" srcset=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4645-1024x768.jpg 1024w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4645-300x225.jpg 300w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4645-768x576.jpg 768w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4645-1536x1152.jpg 1536w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4645-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 806px) 100vw, 806px\" \/><\/a><figcaption><a href=\"https:\/\/www.circuitspecialists.com\/powered-protoboard-system-with-two-led-digital-panel-meters.html\" target=\"_blank\" rel=\"noreferrer noopener\">PBB-272B &nbsp;Powered Solderless Breadboard Kit for Prototyping<\/a> &#8211; Yellow Cycle<\/figcaption><\/figure><\/div>\n\n\n\n<p>Normally the yellow LED would turn ON for the same time as the green LED. But even before the capacitor of 2nd 555 timer IC reaches 1\/3rd of supply voltage, the voltage across capacitor of 1st 555 timer IC reaches 2\/3rds of the supply voltage and so the output of 1st 555 IC turns OFF, resulting in yellow LED turning OFF and the red LED turns ON. The Cyle repeat with Red On.&nbsp;<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><a href=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4646-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4646-1024x768.jpg\" alt=\"\" class=\"wp-image-6972\" width=\"785\" height=\"589\" srcset=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4646-1024x768.jpg 1024w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4646-300x225.jpg 300w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4646-768x576.jpg 768w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4646-1536x1152.jpg 1536w, https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4646-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 785px) 100vw, 785px\" \/><\/a><figcaption><a href=\"https:\/\/www.circuitspecialists.com\/powered-protoboard-system-with-two-led-digital-panel-meters.html\">PBB-272B &nbsp;Powered Solderless Breadboard Kit for Prototyping<\/a> &#8211; Red Cycle <\/figcaption><\/figure><\/div>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"conclusion\">Conclusion<\/h5>\n\n\n\n<p>This circuit turns ON the green LED, keeps it ON for some time, then turns ON the yellow LED for a moment, and finally turns ON the red LED for almost the same duration as the green LED. This cycle again starts from the green LED. It sounds simple enough with a Microcontroller, however not every project needs a microcontroller. Take back to basic help us understand the theory on how this legendary CHIP works its magic!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Let&#8217;s take it back to basic by modeling the traffic lights circuit on a Powered Breadboard PBB-272B and with a<\/p>\n","protected":false},"author":10687,"featured_media":6973,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[1,226,27,8,21,140,155,240,257,17,256,16,120],"tags":[133,168,132,188,143],"class_list":["post-6967","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all-posts","category-announcements","category-breadboards","category-diy","category-education-kits","category-educational-labs","category-electronics-news","category-experiments","category-featured-youtubers","category-pcb","category-prototyping","category-resistors","category-single-board-computers","tag-diy","tag-how-to","tag-makers","tag-power-supplies","tag-prototyping"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.8.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Model Traffic Lights on PBB-272B | Simply Smarter Circuitry Blog<\/title>\n<meta name=\"description\" content=\"Let&#039;s take it back to basic by modeling the traffic lights circuit on a PBB-272B with a few other electronics components.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Model Traffic Lights on PBB-272B | Simply Smarter Circuitry Blog\" \/>\n<meta property=\"og:description\" content=\"Let&#039;s take it back to basic by modeling the traffic lights circuit on a PBB-272B with a few other electronics components.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/\" \/>\n<meta property=\"og:site_name\" content=\"Simply Smarter Circuitry Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/CircuitSpecialists\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-02-17T19:58:19+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-02-21T19:41:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1920\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Khang\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@CircuitSpecial\" \/>\n<meta name=\"twitter:site\" content=\"@CircuitSpecial\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Khang\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/\"},\"author\":{\"name\":\"Khang\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/person\/2004b049c7f4ad1ef1c677c13230001e\"},\"headline\":\"Model Traffic Lights on PBB-272B\",\"datePublished\":\"2022-02-17T19:58:19+00:00\",\"dateModified\":\"2022-02-21T19:41:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/\"},\"wordCount\":609,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg\",\"keywords\":[\"DIY\",\"How-To\",\"Makers\",\"Power Supplies\",\"Prototyping\"],\"articleSection\":[\"All Posts\",\"Announcements\",\"Breadboards\",\"DIY\",\"Education Kits\",\"Educational Labs\",\"Electronics News\",\"Experiments\",\"Featured Youtubers\",\"PCB\",\"Prototyping\",\"Resistors\",\"Single-board Computers\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/\",\"url\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/\",\"name\":\"Model Traffic Lights on PBB-272B | Simply Smarter Circuitry Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg\",\"datePublished\":\"2022-02-17T19:58:19+00:00\",\"dateModified\":\"2022-02-21T19:41:12+00:00\",\"description\":\"Let's take it back to basic by modeling the traffic lights circuit on a PBB-272B with a few other electronics components.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#primaryimage\",\"url\":\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg\",\"contentUrl\":\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg\",\"width\":2560,\"height\":1920},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.circuitspecialists.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Model Traffic Lights on PBB-272B\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#website\",\"url\":\"https:\/\/www.circuitspecialists.com\/blog\/\",\"name\":\"Simply Smarter Circuitry Blog\",\"description\":\"How To&#039;s, Reviews, and Product News from Circuit Specialists HQ.\",\"publisher\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.circuitspecialists.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#organization\",\"name\":\"Circuit Specialists\",\"url\":\"https:\/\/www.circuitspecialists.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2016\/03\/csi.jpg\",\"contentUrl\":\"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2016\/03\/csi.jpg\",\"width\":120,\"height\":120,\"caption\":\"Circuit Specialists\"},\"image\":{\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/CircuitSpecialists\/\",\"https:\/\/x.com\/CircuitSpecial\",\"https:\/\/www.youtube.com\/channel\/UCG87WTqDKIqA704uqjumJgg\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/person\/2004b049c7f4ad1ef1c677c13230001e\",\"name\":\"Khang\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/ffe2b76fa2901ed9a217ed89e6528178?s=96&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/ffe2b76fa2901ed9a217ed89e6528178?s=96&r=g\",\"caption\":\"Khang\"},\"url\":\"https:\/\/www.circuitspecialists.com\/blog\/author\/khang\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Model Traffic Lights on PBB-272B | Simply Smarter Circuitry Blog","description":"Let's take it back to basic by modeling the traffic lights circuit on a PBB-272B with a few other electronics components.","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:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/","og_locale":"en_US","og_type":"article","og_title":"Model Traffic Lights on PBB-272B | Simply Smarter Circuitry Blog","og_description":"Let's take it back to basic by modeling the traffic lights circuit on a PBB-272B with a few other electronics components.","og_url":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/","og_site_name":"Simply Smarter Circuitry Blog","article_publisher":"https:\/\/www.facebook.com\/CircuitSpecialists\/","article_published_time":"2022-02-17T19:58:19+00:00","article_modified_time":"2022-02-21T19:41:12+00:00","og_image":[{"width":2560,"height":1920,"url":"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg","type":"image\/jpeg"}],"author":"Khang","twitter_card":"summary_large_image","twitter_creator":"@CircuitSpecial","twitter_site":"@CircuitSpecial","twitter_misc":{"Written by":"Khang","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#article","isPartOf":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/"},"author":{"name":"Khang","@id":"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/person\/2004b049c7f4ad1ef1c677c13230001e"},"headline":"Model Traffic Lights on PBB-272B","datePublished":"2022-02-17T19:58:19+00:00","dateModified":"2022-02-21T19:41:12+00:00","mainEntityOfPage":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/"},"wordCount":609,"commentCount":0,"publisher":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#primaryimage"},"thumbnailUrl":"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg","keywords":["DIY","How-To","Makers","Power Supplies","Prototyping"],"articleSection":["All Posts","Announcements","Breadboards","DIY","Education Kits","Educational Labs","Electronics News","Experiments","Featured Youtubers","PCB","Prototyping","Resistors","Single-board Computers"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/","url":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/","name":"Model Traffic Lights on PBB-272B | Simply Smarter Circuitry Blog","isPartOf":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#primaryimage"},"image":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#primaryimage"},"thumbnailUrl":"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg","datePublished":"2022-02-17T19:58:19+00:00","dateModified":"2022-02-21T19:41:12+00:00","description":"Let's take it back to basic by modeling the traffic lights circuit on a PBB-272B with a few other electronics components.","breadcrumb":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#primaryimage","url":"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg","contentUrl":"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2022\/02\/IMG_4644-scaled.jpg","width":2560,"height":1920},{"@type":"BreadcrumbList","@id":"https:\/\/www.circuitspecialists.com\/blog\/model-traffic-lights-on-pbb-272b\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.circuitspecialists.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Model Traffic Lights on PBB-272B"}]},{"@type":"WebSite","@id":"https:\/\/www.circuitspecialists.com\/blog\/#website","url":"https:\/\/www.circuitspecialists.com\/blog\/","name":"Simply Smarter Circuitry Blog","description":"How To&#039;s, Reviews, and Product News from Circuit Specialists HQ.","publisher":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.circuitspecialists.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.circuitspecialists.com\/blog\/#organization","name":"Circuit Specialists","url":"https:\/\/www.circuitspecialists.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2016\/03\/csi.jpg","contentUrl":"https:\/\/www.circuitspecialists.com\/blog\/wp-content\/uploads\/2016\/03\/csi.jpg","width":120,"height":120,"caption":"Circuit Specialists"},"image":{"@id":"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/CircuitSpecialists\/","https:\/\/x.com\/CircuitSpecial","https:\/\/www.youtube.com\/channel\/UCG87WTqDKIqA704uqjumJgg"]},{"@type":"Person","@id":"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/person\/2004b049c7f4ad1ef1c677c13230001e","name":"Khang","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.circuitspecialists.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/ffe2b76fa2901ed9a217ed89e6528178?s=96&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ffe2b76fa2901ed9a217ed89e6528178?s=96&r=g","caption":"Khang"},"url":"https:\/\/www.circuitspecialists.com\/blog\/author\/khang\/"}]}},"_links":{"self":[{"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/posts\/6967","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/users\/10687"}],"replies":[{"embeddable":true,"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/comments?post=6967"}],"version-history":[{"count":21,"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/posts\/6967\/revisions"}],"predecessor-version":[{"id":7001,"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/posts\/6967\/revisions\/7001"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/media\/6973"}],"wp:attachment":[{"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/media?parent=6967"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/categories?post=6967"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.circuitspecialists.com\/blog\/wp-json\/wp\/v2\/tags?post=6967"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}