{"id":8028,"date":"2013-10-31T21:19:47","date_gmt":"2013-11-01T01:19:47","guid":{"rendered":"http:\/\/embedded-lab.com\/blog\/?p=8028"},"modified":"2013-10-31T21:19:47","modified_gmt":"2013-11-01T01:19:47","slug":"yet-another-voltage-monitor-for-cars-battery","status":"publish","type":"post","link":"https:\/\/embedded-lab.com\/blog\/yet-another-voltage-monitor-for-cars-battery\/","title":{"rendered":"Yet another voltage monitor for car&#8217;s battery"},"content":{"rendered":"<p>A couple of years ago I built <a href=\"http:\/\/embedded-lab.com\/blog\/?p=3096\"><strong>a digital voltage monitor system<\/strong><\/a> for my car\u2019s battery and its charging system. It plugs into the car\u2019s cigarette lighter receptacle and displays the instantaneous output voltage across the battery terminals on a 4-digit seven segment LED display. I used Microchip\u2019s PIC16F1827 microcontroller and it&#8217;s built-in Fixed Reference Voltage (FVR) module to achieve better A\/D conversion accuracy while measuring the battery voltage. Here&#8217;s an <a href=\"http:\/\/www.instructables.com\/id\/Troubleshoot-your-car-battery-with-ATtiny\/\" target=\"_blank\"><strong>instructable<\/strong><\/a> on building a similar device but using ATtiny13 microcontroller. Instead of displaying real battery voltage, however, this project uses three LEDs as visual indication of battery condition.<\/p>\n<div id=\"attachment_8030\" style=\"width: 590px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2013\/10\/carvoltmeter.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-8030\" class=\"size-full wp-image-8030\" alt=\"Car's battery voltage monitor\" src=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2013\/10\/carvoltmeter.jpg\" width=\"580\" height=\"413\" srcset=\"https:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2013\/10\/carvoltmeter.jpg 580w, https:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2013\/10\/carvoltmeter-550x391.jpg 550w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/><\/a><p id=\"caption-attachment-8030\" class=\"wp-caption-text\">Car&#8217;s battery voltage monitor<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A couple of years ago I built a digital voltage monitor system for my car\u2019s battery and its charging system. It plugs into the car\u2019s cigarette lighter receptacle and displays the instantaneous output voltage across the battery terminals on a 4-digit seven segment LED display. I used Microchip\u2019s PIC16F1827 microcontroller and it&#8217;s built-in Fixed Reference Voltage (FVR) module to achieve better A\/D conversion accuracy while measuring the battery voltage. Here&#8217;s an instructable on building a similar device but using ATtiny13 microcontroller. Instead of displaying real battery voltage, however, this project uses three LEDs as visual indication of battery condition.<\/p>\n","protected":false},"author":1,"featured_media":8030,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[150,15],"tags":[685,686,687],"class_list":["post-8028","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arduino-2","category-avr-projects","tag-attiny13","tag-voltage-monitor","tag-voltmeter"],"_links":{"self":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/8028","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/comments?post=8028"}],"version-history":[{"count":2,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/8028\/revisions"}],"predecessor-version":[{"id":8032,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/8028\/revisions\/8032"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media\/8030"}],"wp:attachment":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media?parent=8028"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/categories?post=8028"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/tags?post=8028"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}