{"product_id":"reed-switch-module-digital-output-ky-021","title":"Reed Switch Module-DIgital Output (KY-021)","description":"\u003cp data-start=\"81\" data-end=\"393\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe KY-021 Reed Switch Module is a compact magnetic field detection module designed to detect the presence or absence of a nearby magnet. It uses a normally open (NO) reed switch enclosed in a hermetically sealed glass tube that closes when exposed to a magnetic field, producing a digital output signal.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"395\" data-end=\"734\"\u003eUnlike the KY-025, the KY-021 provides only a digital output, making it ideal for simple magnetic ON\/OFF detection applications. The module includes an onboard pull-up resistor, allowing it to interface directly with Arduino, ESP32, STM32, Raspberry Pi Pico, and other microcontrollers without requiring additional external components.\u003c\/p\u003e\n\u003cp data-start=\"736\" data-end=\"1082\"\u003eThe KY-021 is commonly used in door and window security systems, position sensing, limit switches, magnetic counters, proximity detection, industrial automation, and robotics applications. Its simple design, reliable operation, and long service life make it an excellent choice for magnetic sensing projects.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-start=\"1084\" data-end=\"1102\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\n\u003cstrong data-start=\"1086\" data-end=\"1102\"\u003eKey Features\u003c\/strong\u003e\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cul data-start=\"1104\" data-end=\"1592\"\u003e\n\u003cli data-section-id=\"1auzmts\" data-start=\"1104\" data-end=\"1144\"\u003eHigh-quality normally open reed switch\u003c\/li\u003e\n\u003cli data-section-id=\"16x0gtd\" data-start=\"1145\" data-end=\"1179\"\u003eDigital magnetic field detection\u003c\/li\u003e\n\u003cli data-section-id=\"2r2hde\" data-start=\"1180\" data-end=\"1213\"\u003eDetects the presence of magnets\u003c\/li\u003e\n\u003cli data-section-id=\"1mtlfa0\" data-start=\"1214\" data-end=\"1236\"\u003eSimple ON\/OFF output\u003c\/li\u003e\n\u003cli data-section-id=\"1q9gyda\" data-start=\"1237\" data-end=\"1264\"\u003eBuilt-in pull-up resistor\u003c\/li\u003e\n\u003cli data-section-id=\"1emvyce\" data-start=\"1265\" data-end=\"1285\"\u003eFast response time\u003c\/li\u003e\n\u003cli data-section-id=\"jhmxae\" data-start=\"1286\" data-end=\"1309\"\u003eLow power consumption\u003c\/li\u003e\n\u003cli data-section-id=\"1fxa87q\" data-start=\"1310\" data-end=\"1337\"\u003eCompact PCB module design\u003c\/li\u003e\n\u003cli data-section-id=\"1e33gw7\" data-start=\"1338\" data-end=\"1371\"\u003eHermetically sealed reed switch\u003c\/li\u003e\n\u003cli data-section-id=\"1fk3fwv\" data-start=\"1372\" data-end=\"1394\"\u003eLong mechanical life\u003c\/li\u003e\n\u003cli data-section-id=\"1spvs2o\" data-start=\"1395\" data-end=\"1429\"\u003eEasy microcontroller interfacing\u003c\/li\u003e\n\u003cli data-section-id=\"1xp9ed6\" data-start=\"1430\" data-end=\"1487\"\u003eCompatible with Arduino, ESP32, STM32, and Raspberry Pi\u003c\/li\u003e\n\u003cli data-section-id=\"yj3vft\" data-start=\"1488\" data-end=\"1539\"\u003eSuitable for security and automation applications\u003c\/li\u003e\n\u003cli data-section-id=\"sca5i1\" data-start=\"1540\" data-end=\"1592\"\u003eIdeal for educational and DIY electronics projects\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Roboracter","offers":[{"title":"Default Title","offer_id":46690849816630,"sku":"IWPN6KEPAQ","price":35.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/0731\/2694\/files\/reed-5.webp?v=1782833309","url":"https:\/\/roboracter.in\/products\/reed-switch-module-digital-output-ky-021","provider":"Roboracter","version":"1.0","type":"link"}