{"id":1305,"date":"2010-12-13T12:27:04","date_gmt":"2010-12-13T17:27:04","guid":{"rendered":"http:\/\/embedded-lab.com\/blog\/?p=1305"},"modified":"2012-07-30T09:29:28","modified_gmt":"2012-07-30T13:29:28","slug":"power-usage-monitor-using-atmel-avr","status":"publish","type":"post","link":"https:\/\/embedded-lab.com\/blog\/power-usage-monitor-using-atmel-avr\/","title":{"rendered":"Power usage monitor using Atmel AVR"},"content":{"rendered":"<p>This project uses Atmega168 microcontroller to compute the power usage at home and logs it to an SD card. It has a graphical LCD display too that shows the power usage as a strip chart. Besides, the voltage and current waveforms can also be displayed on the LCD.<\/p>\n<p style=\"text-align: center;\"><a href=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2010\/12\/inside.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1306 aligncenter\" title=\"inside\" src=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2010\/12\/inside-550x355.jpg\" alt=\"\" width=\"550\" height=\"355\" srcset=\"https:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2010\/12\/inside-550x355.jpg 550w, https:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2010\/12\/inside.jpg 687w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/a><\/p>\n<p>The current is measured using a pair of current transformers whereas the voltage is measured using a 2000:1 voltage divider network. An <a href=\"http:\/\/www.datasheetdir.com\/LMC6484AIN+Rail-to-Rail\">LMC6484AIN<\/a> quad op-amp and an AD623AN instrumentation amplifier are also used for signal amplification from the current sensor and the voltage divider.<!--more--><\/p>\n<table style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr>\n<td><script type=\"text\/javascript\">\/\/ <![CDATA[\n             google_ad_client = \"pub-3251335376149574\"; \/* Embedded-Lab_Blog_468x15, created 10\/1\/10 *\/ google_ad_slot = \"5007918417\"; google_ad_width = 468; google_ad_height = 15;\n\/\/ ]]><\/script><br \/>\n<script src=\"http:\/\/pagead2.googlesyndication.com\/pagead\/show_ads.js\" type=\"text\/javascript\">\n<\/script><\/td>\n<td><a href=\"http:\/\/www.stahlke.org\/dan\/powermeter\/\" target=\"_blank\"><strong>Read More<\/strong><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>This project uses Atmega168 microcontroller to compute the power usage at home and logs it to an SD card. It has a graphical LCD display too that shows the power usage as a strip chart. Besides, the voltage and current waveforms can also be displayed on the LCD. The current is measured using a pair of current transformers whereas the voltage is measured using a 2000:1 voltage divider network. An LMC6484AIN quad op-amp and an AD623AN instrumentation amplifier are also used for signal amplification from the current sensor and the voltage divider.<\/p>\n","protected":false},"author":1,"featured_media":1306,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[139,138],"class_list":["post-1305","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-avr-projects","tag-atmega168","tag-power-meter"],"_links":{"self":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/1305","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=1305"}],"version-history":[{"count":4,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/1305\/revisions"}],"predecessor-version":[{"id":5812,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/1305\/revisions\/5812"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media\/1306"}],"wp:attachment":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media?parent=1305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/categories?post=1305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/tags?post=1305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}