{"id":119820,"date":"2023-06-06T11:09:35","date_gmt":"2023-06-06T05:39:35","guid":{"rendered":"https:\/\/www.electronicsforu.com\/?p=119820"},"modified":"2024-08-07T13:42:02","modified_gmt":"2024-08-07T08:12:02","slug":"kitchen-security-alarm","status":"publish","type":"post","link":"https:\/\/www.electronicsforu.com\/electronics-projects\/kitchen-security-alarm","title":{"rendered":"Kitchen Security Alarm Using MQ2 Sensor"},"content":{"rendered":"\n<p>The most common cause of fire in a kitchen is gas leakage. This project will help you make an LPG leakage cum smoke detector kitchen security alarm using a gas sensor. The sensor will detect the intensity of LPG gas as well as smoke, if any. If the intensity of LPG gas or smoke exceeds a certain limit, an audible alarm will notify you to take care of the leakage as soon as possible.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"178\" height=\"169\" src=\"https:\/\/www.electronicsforu.com\/wp-contents\/uploads\/2022\/06\/efy-tested.jpg\" alt=\"efy tested\" class=\"wp-image-97958\"\/><\/figure><\/div>\n\n\n<p>LPG\/smoke detectors are amazing devices as they are small and low-cost, yet very useful. MQ2 is the most common metal oxide semiconductor (MOS) type of gas sensor. It is very sensitive to smoke and flammable gases like LPG, butane, propane, methane, alcohol, hydrogen, and carbon monoxide. When a gas comes in contact with the sensor, the circuit uses a simple voltage divider network to detect it.<\/p>\n\n\n\n<p><strong>Video Tutorial In English:<\/strong><\/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<span class=\"k54I1eaA2MxFQ3vTYzoSmViqn8gbGtDpNsjHUJW7RhZ9r\"><iframe loading=\"lazy\" title=\"LIVE DIY (English): How To Make Kitchen Security Alarm Using MQ2 Sensor\" width=\"696\" height=\"392\" src=\"https:\/\/www.youtube.com\/embed\/XZJF86kUC7U?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/span>\n<\/div><\/figure>\n\n\n\n<p><strong>Video Tutorial In Tamil:<\/strong><\/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<span class=\"6Ofu2CIJKYDFP8EmHSsi\"><iframe loading=\"lazy\" title=\"LIVE DIY (Tamil): How To Make Kitchen Security Alarm Using MQ2 Sensor\" width=\"696\" height=\"392\" src=\"https:\/\/www.youtube.com\/embed\/fkoVCFYARpI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/span>\n<\/div><\/figure>\n\n\n\n<p>You can also check the <a href=\"https:\/\/www.electronicsforu.com\/electronics-projects\/hardware-diy\/gas-leakage-alarm\">gas leakage detector<\/a> that we build previously.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1300\" height=\"284\" src=\"https:\/\/www.electronicsforu.com\/wp-contents\/uploads\/2023\/05\/Kitchen-security.jpg\" alt=\"Kitchen Security Alarm Circuit diagram\" class=\"wp-image-119843\"\/><figcaption class=\"wp-element-caption\">Fig. 1: Circuit diagram<\/figcaption><\/figure>\n\n\n\n<p>The MQ2 sensor has two electrodes made of aluminum oxide (Al2O3) and a heating element made of tin dioxide (SnO2) that acts as the main sensing layer.<\/p>\n\n\n\n<figure class=\"wp-block-table aligncenter\"><table><tbody><tr><td colspan=\"3\"><strong>Kitchen Security Alarm Parts List<\/strong><\/td><\/tr><tr><td colspan=\"3\">Semiconductors:<\/td><\/tr><tr><td>IC1<\/td><td>-LM7805, 5V voltage regulator<\/td><\/tr><tr><td>IC2<\/td><td>-LM358 op-amp<\/td><\/tr><tr><td>IC3<\/td><td>-NE555 timer<\/td><\/tr><tr><td>T1, T2<\/td><td>-2N2219 NPN transitor<\/td><\/tr><tr><td>BR1<\/td><td>-1A bridge rectifier<\/td><\/tr><tr><td>LED1<\/td><td>-5mm LED<\/td><\/tr><tr><td>D1<\/td><td>-1N4007 rectifier diode<\/td><\/tr><tr><td colspan=\"3\">Resistors (all 1\/4-watt, \u00b15% carbon):<\/td><\/tr><tr><td>R1, R2, R4, R5<\/td><td>-1-kilo-ohm<\/td><\/tr><tr><td>R3, R7<\/td><td>-680-ohm<\/td><\/tr><tr><td>R6<\/td><td>-1-mega-ohm<\/td><\/tr><tr><td colspan=\"3\">Capacitors:<\/td><\/tr><tr><td>C1<\/td><td>-1000\u03bcF, 35V electrolytic<\/td><\/tr><tr><td>C2<\/td><td><strong>&#8211;<\/strong>1000\u03bcF, 16V electrolytic<\/td><\/tr><tr><td>C3<\/td><td>-10nF ceramic disk<\/td><\/tr><tr><td colspan=\"3\">Miscellaneous:<\/td><\/tr><tr><td>Exhaust fan<\/td><td>-230V AC operated<\/td><\/tr><tr><td>RL1<\/td><td>-5V, SPDT relay<\/td><\/tr><tr><td>CON1-CON3<\/td><td>-2-pin connector<\/td><\/tr><tr><td>Sensor1<\/td><td>-MQ2 gas sensor<\/td><\/tr><tr><td>X1<\/td><td>-230V AC primary to 9V, 500mA secondary transformer<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Kitchen Security Alarm &#8211; Circuit Connections<\/strong><\/h2>\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\/119820\" \/>\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\n","protected":false},"excerpt":{"rendered":"<p>The most common cause of fire in a kitchen is gas leakage. This project will help you make an LPG leakage cum smoke detector kitchen security alarm using a gas sensor. The sensor will detect the intensity of LPG gas as well as smoke, if any. If the intensity of LPG gas or smoke exceeds [&hellip;]<\/p>\n","protected":false},"author":106036,"featured_media":119843,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,23,6070,6072,3713],"tags":[130,1985,111,11994],"class_list":{"0":"post-119820","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-beginners-projects","11":"category-premium","12":"tag-digital-electronics-projects","13":"tag-diy-projects","14":"tag-electrical-projects","15":"tag-jun-2023"},"_links":{"self":[{"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts\/119820","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\/106036"}],"replies":[{"embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/comments?post=119820"}],"version-history":[{"count":1,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts\/119820\/revisions"}],"predecessor-version":[{"id":144921,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts\/119820\/revisions\/144921"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/media\/119843"}],"wp:attachment":[{"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/media?parent=119820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/categories?post=119820"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/tags?post=119820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}