{"id":125506,"date":"2023-09-06T18:52:05","date_gmt":"2023-09-06T13:22:05","guid":{"rendered":"https:\/\/www.electronicsforu.com\/?p=125506"},"modified":"2024-10-09T15:17:52","modified_gmt":"2024-10-09T09:47:52","slug":"555-automatic-dispenser","status":"publish","type":"post","link":"https:\/\/www.electronicsforu.com\/electronics-projects\/555-automatic-dispenser","title":{"rendered":"Automatic Dispenser Using 555 Timer"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"alignright size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"180\" src=\"https:\/\/www.electronicsforu.com\/wp-contents\/uploads\/2023\/08\/EFY-test-Prakhar-Mishra.jpg\" alt=\"\" class=\"wp-image-125554\"\/><\/figure><\/div>\n\n\n<p>The <a href=\"https:\/\/www.electronicsforu.com\/technology-trends\/learn-electronics\/555-timer-working-specifications\">555 timer<\/a> has been a popular choice in electronics for a long time due to its versatility and wide range of applications. <\/p>\n\n\n\n<p>It can be used as a timer, oscillator, frequency divider, frequency modulator, triangular signal generator, and more.<\/p>\n\n\n\n<p>You can check the <a href=\"https:\/\/www.electronicsforu.com\/electronics-projects\/555-timer-circuits\">Interesting 555 Timer Projects<\/a>.<\/p>\n\n\n\n<p>The 555 timer has three main modes: monostable, astable, and bistable.<\/p>\n\n\n\n<p>In this article, we will explore a new mode of operation for the 555 timer that generates a unique pulse when the circuit is powered on.<\/p>\n\n\n\n<div class=\"wp-block-group has-background\" style=\"background-color:#f8f8f8;text-decoration:underline\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#unique-mode-of-operation-for-the-555-timer\">Unique Mode of Operation for the 555 Timer<\/a><ul><li><a href=\"#how-does-this-unique-mode-work\">How does this Unique Mode Work?<\/a><\/li><\/ul><\/li><li><a href=\"#automatic-dispenser-using-lm-555\">Automatic Dispenser Using LM555<\/a><ul><li><a href=\"#circuit-and-working\">Circuit and Working<\/a><\/li><li><a href=\"#pcb-design\">PCB Design<\/a><\/li><li><a href=\"#construction-and-testing\">Construction and Testing<\/a><\/li><\/ul><\/li><li><a href=\"#other-diy-dispenser-projects\">Other DIY Dispenser Projects<\/a><\/li><\/ul><\/nav><\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"unique-mode-of-operation-for-the-555-timer\"><strong>Unique Mode of Operation for the 555 Timer<\/strong><\/h2>\n\n\n\n<p>The only way to generate another pulse is by turning off the circuit and then powering it on again. While one might think that this can be achieved with the monostable mode by setting pin 2 to low (ground), doing so would result in the output of the 555 timer always being on. <\/p>\n\n\n\n<p>(You can try this yourself) <\/p>\n\n\n\n<p>In this particular monostable mode, pins 5 and 7 are not used. Fig. 1 illustrates the circuit diagram of this specific monostable circuit.<\/p>\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. 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It can be used as a timer, oscillator, frequency divider, frequency modulator, triangular signal generator, and more. You can check the Interesting 555 Timer Projects. The 555 timer has three main modes: [&hellip;]<\/p>\n","protected":false},"author":165784,"featured_media":126180,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,23,6070,3713],"tags":[1910,1985,110,11987],"class_list":{"0":"post-125506","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-premium","11":"tag-diy","12":"tag-diy-projects","13":"tag-electronics-projects","14":"tag-sept-2023"},"_links":{"self":[{"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts\/125506","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\/165784"}],"replies":[{"embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/comments?post=125506"}],"version-history":[{"count":1,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts\/125506\/revisions"}],"predecessor-version":[{"id":149289,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/posts\/125506\/revisions\/149289"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/media\/126180"}],"wp:attachment":[{"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/media?parent=125506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/categories?post=125506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.electronicsforu.com\/wp-json\/wp\/v2\/tags?post=125506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}