{"product_id":"fire-alarm","title":"Fire alarm","description":"\u003cstrong\u003eFire alarm device\u003c\/strong\u003e works on the principle of IR sensors. Fires contain a large amount of Infrared (IR) signals. In case the fire is detected, the buzzer beeps, and the LED gets turned on. \u003cspan data-mce-fragment=\"1\"\u003e The \u003cstrong\u003efire\u003c\/strong\u003e\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong\u003e alarm circuit\u003c\/strong\u003e is made from good quality material.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003eThe resistance of IR sensors decreases, as the IR rays fall on them.\u003cstrong\u003e The fire alarm\u003c\/strong\u003e is clear from the given \u003cstrong\u003ecircuit diagram\u003c\/strong\u003e that if the resistance of the IR sensor decreases, the voltage V3 will increase as it forms a resistance divider network. Hence as soon as the fire is detected, the v3 increases, and hence the transistor gets turned on and the buzzer LED also gets turned on.\u003cbr\u003e\u003cbr\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions (cm) L x W x H : 20 x 15 x 5\u003c\/li\u003e\n\u003cli\u003eWeight (gm): 200\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eProduct Video\u003c\/h3\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/o-_sFOQYYck\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv id=\"p_video\"\u003e\u003ciframe width=\"800\" height=\"400\" src=\"https:\/\/www.youtube.com\/embed\/ksfNm8ypTxs\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"DO IT YOURSELF","offer_id":40708896620725,"sku":"LGSK029","price":129.0,"currency_code":"INR","in_stock":true},{"title":"READY TO USE","offer_id":40708896653493,"sku":"LGSK029_R","price":249.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/fire-alarm-project_fd0b0cdc-9671-4c13-b754-507f720cbab7.jpg?v=1634716458","url":"https:\/\/kitsguru.com\/fr\/products\/fire-alarm","provider":"KitsGuru","version":"1.0","type":"link"}