{"id":87126,"date":"2024-09-03T14:00:35","date_gmt":"2024-09-03T12:00:35","guid":{"rendered":"https:\/\/botland.com.pl\/blog\/rtc-clock-what-is-it-and-what-is-it-used-for\/"},"modified":"2026-04-08T10:51:27","modified_gmt":"2026-04-08T08:51:27","slug":"rtc-clock-what-is-it-and-what-is-it-used-for","status":"publish","type":"post","link":"https:\/\/botland.store\/blog\/rtc-clock-what-is-it-and-what-is-it-used-for\/","title":{"rendered":"RTC clock &#8211; What is it and what is it used for?"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time:<\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">min.<\/span><\/span>\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"87126\" class=\"elementor elementor-87126 elementor-80760\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a881658 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a881658\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3813fb0\" data-id=\"3813fb0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-930b0e1 elementor-widget elementor-widget-text-editor\" data-id=\"930b0e1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Measuring time in human history was less precise than it is today due to the lack of advanced technology and tools we have today.<br \/>\nMethods had limited accuracy especially in case of changes in weather conditions or even local customs.<br \/>\nToday, such situations cannot be mentioned.  <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0af7b7d elementor-widget elementor-widget-heading\" data-id=\"0af7b7d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">RTC clocks - what are they?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e7c5f72 elementor-widget elementor-widget-text-editor\" data-id=\"e7c5f72\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>History <a href=\"https:\/\/botland.com.pl\/536-moduly-rtc\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\"><strong>of the real-time clock (RTC)<\/strong> <\/a>dates back to the early days of computers, or rather computer science, when the need for perfectly accurate timing became increasingly important.<br \/>\nThe first <strong>RTC clocks<\/strong> were mechanical <strong>clocks<\/strong> that used a quartz oscillator to maintain a constant frequency, which was then used to drive a mechanical counter.<br \/>\nWhen a voltage is applied to such a crystal, it deforms in a characteristic way, leading to a mechanical oscillation with a fixed resonant frequency.<br \/>\nThese mechanical vibrations are converted to an electrical signal by appropriate electronics, resulting in a stable periodic signal.   <\/p>\n<p>Over time, RTCs have become more sophisticated and have begun to use digital technology.<br \/>\nThe first digital RTC clock was developed in the 1970s.<br \/>\nIt was developed in the 1970s and used a microprocessor to keep track of time.<br \/>\nThese early digital RTC clocks were used in a variety of applications, including computers, watches and other electronic devices.<br \/>\nToday, RTC clocks are an essential part of many electronic devices, including computers, smartphones and other digital devices.<br \/>\nThey serve to provide unquestionable assurance that the time and date displayed on these devices are always accurate &#8211; even when our device is turned off.     <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-096fe56 elementor-widget elementor-widget-heading\" data-id=\"096fe56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Application of the RTC clock<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-ceaae6f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ceaae6f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-3508cc8\" data-id=\"3508cc8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-639cadf elementor-widget elementor-widget-spacer\" data-id=\"639cadf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cd7881d elementor-widget elementor-widget-text-editor\" data-id=\"cd7881d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Since <a href=\"https:\/\/botland.com.pl\/536-moduly-rtc\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\"><strong>real-time clock (RTC)<\/strong><\/a> is a type of clock that gives the current time even when the power is turned off or the system is reset.  <\/p>\n<p>This is because an RTC clock is usually powered by a small battery that continues to provide power even if the main power supply is lost &#8211; this can be used to mark time with events or schedule tasks to be completed at a specific time.<br \/>\nBelow we have gathered potential advantages in the form of real-time clock functionality. <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-c6fb651\" data-id=\"c6fb651\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f2b960e elementor-widget elementor-widget-image\" data-id=\"f2b960e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/botland.com.pl\/blog\/wp-content\/uploads\/2024\/08\/12507_5.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"12507_5\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6ODcxMTMsInVybCI6Imh0dHBzOlwvXC9ib3RsYW5kLnN0b3JlXC9ibG9nXC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wOFwvMTI1MDdfNS5qcGcifQ%3D%3D\" data-wpel-link=\"internal\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"277\" height=\"300\" src=\"https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/08\/12507_5-277x300.jpg\" class=\"attachment-medium size-medium wp-image-87113\" alt=\"\" srcset=\"https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/08\/12507_5-277x300.jpg 277w, https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/08\/12507_5-944x1024.jpg 944w, https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/08\/12507_5-768x833.jpg 768w, https:\/\/botland.store\/blog\/wp-content\/uploads\/2024\/08\/12507_5.jpg 1080w\" sizes=\"(max-width: 277px) 100vw, 277px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">RTC DS1307 + 32kb EEPROM 24C32 I2C.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-868b648 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"868b648\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/botland.com.pl\/moduly-rtc\/12507-rtc-ds1307-32kb-eeprom-24c32-i2c-zegar-czasu-rzeczywistego-z-pamiecia-5904422341121.html\" target=\"_blank\" data-wpel-link=\"internal\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">CHECK<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-cbdbcdf elementor-widget elementor-widget-spacer\" data-id=\"cbdbcdf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a81dafe elementor-widget elementor-widget-text-editor\" data-id=\"a81dafe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul style=\"font-size: 16px; background-color: #ffffff;\">\n<li style=\"font-size: 16px;\">Keep track of the current time and date, even when the power is turned off or the system is reset.<\/li>\n<li style=\"font-size: 16px;\">Maintaining the accuracy of other system clocks, which can vary over time.<\/li>\n<li style=\"font-size: 16px;\">Synchronize events across multiple systems or devices, which is important for distributed systems or applications that require high-precision synchronization.<\/li>\n<li style=\"font-size: 16px;\">Provide a reference point for measuring the duration of events or calculating elapsed time.<\/li>\n<li style=\"font-size: 16px;\">Enabling the scheduling of tasks to be completed at specific times.<\/li>\n<li style=\"font-size: 16px;\">Provide a source of timing information that is not subject to network latency or other external factors.<\/li>\n<li style=\"font-size: 16px;\">Enable the system to automatically adjust to time changes due to daylight saving time or other time zone changes.<\/li>\n<li style=\"font-size: 16px;\">Ensure the security and integrity of time-sensitive data, such as financial transactions or security logs.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0fdb2d7 elementor-widget elementor-widget-heading\" data-id=\"0fdb2d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Modern real-time clocks<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ddb7d1c elementor-widget elementor-widget-text-editor\" data-id=\"ddb7d1c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Without <a href=\"https:\/\/botland.com.pl\/536-moduly-rtc\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\"><strong>RTC clock<\/strong><\/a> today&#8217;s personal computers and mobile devices would have to rely on time synchronization every time they are turned on, which would be cumbersome and less convenient for users.<br \/>\nRTC clocks are used in <strong>alarm systems, surveillance cameras, access controls<\/strong> and other security systems to accurately time events such as alarms, event logging and video recording.<br \/>\nWithout RTC clocks, these systems could not function properly, since they rely on providing accurate timestamps for events.<br \/>\nWithout a precise RTC clock, <strong>GPS navigation systems<\/strong> could operate much less accurately and with delays even costing human health and lives.<br \/>\nIn the dawn of <strong>IoT<\/strong> (Internet of Things, Internet of Things), our smart building controller sensors also need to be synchronized, not to mention banking, stock market systems or even military installations.      <\/p>\n<p>Interesting parameters of today&#8217;s RTC clocks &#8211; often based on high-precision quartz crystals and advanced electronic circuitry &#8211; include maximum error per month, i.e. acceptable error usually at the millisecond level, indicators of long-term stability or initialization accuracy at startup &#8211; the faster and more accurately you can synchronize to real time after startup, the better.<\/p>\n<p>For transactional and financial systems, an error in the RTC clock could make it difficult to track and audit transactions, in medical applications it could lead to incorrect timestamps for examinations or surgical procedures, and in navigation and localization it could lead to disasters due to position calculation errors &#8211; that&#8217;s why their reliability is so important to us.<br \/>\nTesting requires not only proper configuration at the outset, but also observation over an extended period of time to verify that there are no spikes in readings, and that functions are actually performed when the integrated device or system is powered down. <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-01eed77 elementor-widget elementor-widget-heading\" data-id=\"01eed77\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">RTC clocks in electronics<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-12c7417 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"12c7417\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Integrations, integrations and more compatibility.<\/strong> In small electronics, such as projects using the <a href=\"https:\/\/botland.com.pl\/234-arduino\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\"><strong>Arduino<\/strong><\/a> and microcontrollers, real-time clocks (RTCs) are readily used for a variety of applications that require accurate time tracking.<br \/>\nThe instinctively obvious ones are digital clocks with LCDs or LEDs.<br \/>\nIn projects involving automation systems, smart homes or appliance control, RTC clocks can be used to schedule and execute specific tasks at specific points in time.  <\/p>\n<p>For example, a home automation system can be programmed to turn on lights at specific times or assist in changing the desired temperature depending on the time of day.<br \/>\nWhere time-based data logging is required, RTC clocks can be used to mark each data sample with an accurate timestamp.<br \/>\nThis makes it possible to analyze the data later and understand when and how it was collected.  <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Articles, tutorials, tutorials, trivia and news &#8211; 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