{"id":3571,"date":"2023-12-27T11:54:39","date_gmt":"2023-12-27T11:54:39","guid":{"rendered":"https:\/\/nvis.scientech.co.in\/?post_type=product&#038;p=3571"},"modified":"2026-01-29T16:14:26","modified_gmt":"2026-01-29T10:44:26","slug":"advanced-level-code-lock-system-with-lcd","status":"publish","type":"product","link":"https:\/\/nvis.scientech.co.in\/?product=advanced-level-code-lock-system-with-lcd","title":{"rendered":"Advanced Level Code Lock System with LCD"},"content":{"rendered":"<p>Nvis 33D is a versatile security device based on microcontroller 8051 family, which gives the alternative of keys. The user can set a 3 digit password (000-999). Light and sound indications are given for correct \/ incorrect passwords. User has 3 chances to enter passwords. The circuit is operated using 9V battery<br \/>\nProduct Features<\/p>\n<ul>\n<li>The user can set a 3 digit password (000- 999) .<\/li>\n<li>Light and sound indications are given for correct \/ incorrect passwords.<\/li>\n<li>User has 3 chances to enter passwords.<\/li>\n<li>Descriptive operating manual with procedure.<\/li>\n<li>Simple and easy to perform.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Nvis 33D is a versatile security device based on microcontroller 8051 family, which gives the alternative of keys. The user can set a 3 digit password (000-999). Light and sound indications are given for correct \/ incorrect passwords. User has 3 chances to enter passwords. The circuit is operated using 9V battery Product Features The [&hellip;]<\/p>\n","protected":false},"featured_media":1354,"template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"product_cat":[120],"product_tag":[],"class_list":["post-3571","product","type-product","status-publish","has-post-thumbnail","product_cat-science-kit","first","instock","shipping-taxable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Microcontroller-Based Security Device - Nvis 33D<\/title>\n<meta name=\"description\" content=\"Secure with Nvis 33D, microcontroller-based security device.Set 3-digit passwords with light\/sound alerts.Reliable and versatile,it is powered by a 9V battery\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Microcontroller-Based Security Device - Nvis 33D\" \/>\n<meta property=\"og:description\" content=\"Secure with Nvis 33D, microcontroller-based security device.Set 3-digit passwords with light\/sound alerts.Reliable and versatile,it is powered by a 9V battery\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/\" \/>\n<meta property=\"og:site_name\" content=\"Nvis\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-29T10:44:26+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/nvis.scientech.co.in\/wp-content\/uploads\/2023\/12\/advanced-level-code-lock-system-with-lcd-nvis-33d-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1119\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/\",\"url\":\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/\",\"name\":\"Microcontroller-Based Security Device - Nvis 33D\",\"isPartOf\":{\"@id\":\"https:\/\/nvis.scientech.co.in\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/nvis.scientech.co.in\/wp-content\/uploads\/2023\/12\/advanced-level-code-lock-system-with-lcd-nvis-33d-1.jpg\",\"datePublished\":\"2023-12-27T11:54:39+00:00\",\"dateModified\":\"2026-01-29T10:44:26+00:00\",\"description\":\"Secure with Nvis 33D, microcontroller-based security device.Set 3-digit passwords with light\/sound alerts.Reliable and versatile,it is powered by a 9V battery\",\"breadcrumb\":{\"@id\":\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/#primaryimage\",\"url\":\"https:\/\/nvis.scientech.co.in\/wp-content\/uploads\/2023\/12\/advanced-level-code-lock-system-with-lcd-nvis-33d-1.jpg\",\"contentUrl\":\"https:\/\/nvis.scientech.co.in\/wp-content\/uploads\/2023\/12\/advanced-level-code-lock-system-with-lcd-nvis-33d-1.jpg\",\"width\":1920,\"height\":1119,\"caption\":\"Advanced Level Code Lock System with LCD\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/nvis.scientech.co.in\/product\/advanced-level-code-lock-system-with-lcd\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/nvis.scientech.co.in\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Products\",\"item\":\"https:\/\/nvis.scientech.co.in\/shop\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Advanced Level Code Lock System with LCD\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/nvis.scientech.co.in\/#website\",\"url\":\"https:\/\/nvis.scientech.co.in\/\",\"name\":\"Nvis Technologies Pvt. 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