{"id":147037,"date":"2024-09-01T04:00:00","date_gmt":"2024-08-31T22:30:00","guid":{"rendered":"https:\/\/www.electronicsforu.com\/?p=147037"},"modified":"2024-11-29T00:56:14","modified_gmt":"2024-11-28T19:26:14","slug":"automatic-power-cutoff-timer-circuit","status":"publish","type":"post","link":"https:\/\/www.electronicsforu.com\/electronics-projects\/automatic-power-cutoff-timer-circuit","title":{"rendered":"Automatic Power Cut-off Timer Using Supercapacitor"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"232\" height=\"212\" src=\"https:\/\/www.electronicsforu.com\/wp-contents\/uploads\/2024\/09\/abhay-verma.png\" alt=\"\" class=\"wp-image-151717\" style=\"width:121px;height:auto\"\/><\/figure><\/div>\n\n\n<p>When charging devices like mobiles and laptops, it is easy to forget to switch off the power once they are fully charged, often resulting in devices remaining connected to the AC mains supply for hours. A simple solution to this oversight is presented here. <\/p>\n\n\n\n<p>The circuit shown in Fig. 1 can automatically switch off any device connected to the AC mains supply after a period ranging from one to over four hours. Extending the delay period is possible by adjusting the values of the resistors used in the circuit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">POC Video Tutorial In English<\/h2>\n\n\n\n<figure class=\"wp-block-embed aligncenter 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<span class=\"wf92CElZSIsNM1RjPV4X5z6zmCt6sb3vPOADTudBq5KUGnWfmkEIhKjkFiyy7w0uptLhgMHa9q\"><iframe loading=\"lazy\" title=\"Smart Energy Saver Circuit | Electronics For You | English\" width=\"696\" height=\"392\" src=\"https:\/\/www.youtube.com\/embed\/AYWR3KFip0I?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/span>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">POC Video Tutorial In Hindi<\/h2>\n\n\n\n<figure class=\"wp-block-embed aligncenter 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<span class=\"JbXnSwPGgq1dakcrDpNK7YUBh42zxmfF8EiTVyWQC6LHlt\"><div class=\"youtube-embed\" data-video_id=\"4dju2awRUmw\"><iframe loading=\"lazy\" title=\"Smart Energy Saver Circuit | Electronics For You | Hindi\" width=\"696\" height=\"392\" src=\"https:\/\/www.youtube.com\/embed\/4dju2awRUmw?feature=oembed&#038;enablejsapi=1\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div><\/span>\n<\/div><\/figure>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"359\" src=\"https:\/\/www.electronicsforu.com\/wp-contents\/uploads\/2024\/08\/EFY-labs-prototype-tested-on-a-breadboard-without-a-transformer.jpg\" alt=\"Automatic Power Cut-off Timer Circuit on Breadboard\" class=\"wp-image-147043\" style=\"width:711px;height:auto\" srcset=\"https:\/\/www.electronicsforu.com\/wp-contents\/uploads\/2024\/08\/EFY-labs-prototype-tested-on-a-breadboard-without-a-transformer.jpg 800w, https:\/\/www.electronicsforu.com\/wp-contents\/uploads\/2024\/08\/EFY-labs-prototype-tested-on-a-breadboard-without-a-transformer-500x224.jpg 500w, https:\/\/www.electronicsforu.com\/wp-contents\/uploads\/2024\/08\/EFY-labs-prototype-tested-on-a-breadboard-without-a-transformer-696x312.jpg 696w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">EFY lab\u2019s prototype tested on a breadboard without a transformer<\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>Circuit and Working<\/strong><\/h2>\n\n\n\n<p>Fig. 2 shows the circuit diagram of a long-duration timer using a supercapacitor. The circuit comprises a centre-tapped transformer (X1), four rectifier diodes (1N4001, D1-D4), a dual op-amp (LM358, IC1), a transistor (2N3904, T1), a 5V SPDT relay, two LEDs (LED1, LED2), and additional components.<\/p>\n\n\n\n<div class=\"mepr_error\"><div class=\"locked-content\">\n<b>EFY++ CONTENT: ACCESS TO THIS CONTENT IS FREE! BUT YOU NEED TO BE A REGISTERED USER.<\/b><\/p>\n<p>Oops! This is an EFY++ article, which means it's our Premium Content. You need to be a Registered User of our website to read its complete content.<\/p>\n<p><b>Good News: <\/b>You can register to our website for FREE! <a href=\"https:\/\/www.electronicsforu.com\/plans\/subscription-plans\" target=\"_blank\" rel=\"noopener\">CLICK HERE<\/a> to register now.<\/p>\n<p><b>Already a registered member? <\/b>If YES, then simply login to you account below. (TIP: Use 'forgot password' feature and reset and save your new password in your browser, if you forgot the last one!)\n<\/div>\n<\/div><div>\n<div class=\"mp_wrapper mp_login_form\">\n                  <!-- mp-login-form-start -->     <form name=\"mepr_loginform\" id=\"mepr_loginform\" class=\"mepr-form\" action=\"https:\/\/www.electronicsforu.com\/login\" method=\"post\">\n            <div class=\"mp-form-row mepr_username\">\n        <div class=\"mp-form-label\">\n                              <label for=\"user_login\">Username<\/label>\n        <\/div>\n        <input type=\"text\" name=\"log\" id=\"user_login\" value=\"\" \/>\n      <\/div>\n      <div class=\"mp-form-row mepr_password\">\n        <div class=\"mp-form-label\">\n          <label for=\"user_pass\">Password<\/label>\n          <div class=\"mp-hide-pw\">\n            <input type=\"password\" name=\"pwd\" id=\"user_pass\" value=\"\" \/>\n            <button type=\"button\" class=\"button mp-hide-pw hide-if-no-js\" data-toggle=\"0\" aria-label=\"Show password\">\n              <span class=\"dashicons dashicons-visibility\" aria-hidden=\"true\"><\/span>\n            <\/button>\n          <\/div>\n        <\/div>\n      <\/div>\n            <div>\n        <label><input name=\"rememberme\" type=\"checkbox\" id=\"rememberme\" value=\"forever\" \/> Remember Me<\/label>\n      <\/div>\n      <div class=\"mp-spacer\">&nbsp;<\/div>\n      <div class=\"submit\">\n        <input type=\"submit\" name=\"wp-submit\" id=\"wp-submit\" class=\"button-primary mepr-share-button \" value=\"Log In\" \/>\n        <input type=\"hidden\" name=\"redirect_to\" value=\"\/wp-json\/wp\/v2\/posts\/147037\" \/>\n        <input type=\"hidden\" name=\"mepr_process_login_form\" value=\"true\" \/>\n        <input type=\"hidden\" name=\"mepr_is_login_page\" value=\"false\" \/>\n      <\/div>\n    <\/form>\n    <div class=\"mp-spacer\">&nbsp;<\/div>\n    <div class=\"mepr-login-actions\">\n      <a href=\"https:\/\/www.electronicsforu.com\/login?action=forgot_password\">Forgot Password<\/a>\n    <\/div>\n\n      \n    <!-- mp-login-form-end --> \n  <\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>When charging devices like mobiles and laptops, it is easy to forget to switch off the power once they are fully charged, often resulting in devices remaining connected to the AC mains supply for hours. A simple solution to this oversight is presented here. The circuit shown in Fig. 1 can automatically switch off any [&hellip;]<\/p>\n","protected":false},"author":206058,"featured_media":147045,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,23,6070,3713],"tags":[1985,1911,110,83],"class_list":{"0":"post-147037","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-electronics-projects","8":"category-hardware-diy","9":"category-advanced-projects","10":"category-premium","11":"tag-diy-projects","12":"tag-do-it-yourself","13":"tag-electronics-projects","14":"tag-featured"},"_links":{"self":[{"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts\/147037","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/users\/206058"}],"replies":[{"embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/comments?post=147037"}],"version-history":[{"count":1,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts\/147037\/revisions"}],"predecessor-version":[{"id":152961,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts\/147037\/revisions\/152961"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/media\/147045"}],"wp:attachment":[{"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/media?parent=147037"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/categories?post=147037"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/tags?post=147037"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}