{"product_id":"burglar-alarm","title":"Burglar Alarm Kit","description":"\u003cp\u003eThe \u003cstrong\u003eBurglar Alarm\u003c\/strong\u003e is a simple DIY electronics project that detects unauthorized entry and activates a buzzer to provide an instant audible alert. It is an ideal learning kit for students, beginners, and hobbyists to understand the basics of security alarm systems. Suitable for school science exhibitions, STEM education, and DIY electronics projects.\u003c\/p\u003e\n\u003ch3 class=\"PDq2pG_selectionAnchorContainer\"\u003eComponents\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLaser Diode Module\u003c\/li\u003e\n\u003cli\u003eBC547 NPN Transistor\u003c\/li\u003e\n\u003cli\u003e5V Buzzer\u003c\/li\u003e\n\u003cli\u003eLDR \u003c\/li\u003e\n\u003cli\u003e9V Battery\u003c\/li\u003e\n\u003cli\u003e9V Battery Connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"PDq2pG_selectionAnchorContainer\"\u003eWorking Principle\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003eThe burglar alarm uses a magnetic reed switch as the sensing element. When the door or window is opened, the magnetic contact changes state, triggering the BC547 transistor. The transistor switches ON the buzzer, producing a loud alarm to indicate unauthorized entry.\u003c\/p\u003e\n\u003ch3\u003eAdvantages\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEasy to build and operate\u003c\/li\u003e\n\u003cli\u003eInstant intrusion detection\u003c\/li\u003e\n\u003cli\u003eLow power consumption\u003c\/li\u003e\n\u003cli\u003eCompact and cost-effective\u003c\/li\u003e\n\u003cli\u003eIdeal for educational and DIY projects\u003c\/li\u003e\n\u003cli\u003eDemonstrates basic security system concepts\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shop.ProjectX","offers":[{"title":"Default Title","offer_id":52913698341157,"sku":null,"price":0.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1003\/7828\/0229\/files\/48ceea96-efee-4981-b057-515ee2173d2a.png?v=1785395609","url":"https:\/\/shop.projectxedu.com\/products\/burglar-alarm","provider":"Shop.ProjectX","version":"1.0","type":"link"}