{"id":500,"date":"2013-03-27T13:14:20","date_gmt":"2013-03-27T19:14:20","guid":{"rendered":"http:\/\/www.lazarenko.us\/?p=500"},"modified":"2013-04-04T13:14:41","modified_gmt":"2013-04-04T19:14:41","slug":"frequency-meter","status":"publish","type":"post","link":"https:\/\/www.lazarenko.us\/?p=500","title":{"rendered":"Frequency meter"},"content":{"rendered":"<p>Next step in <a href=\"http:\/\/www.lazarenko.us\/?p=440\">my current electronics project<\/a>, after idea and schematics, is prototyping. Here is working prototype assembled on breadboard using lab equipment (like power supply etc). In top-left corner is zero-level cross detector, it converts any periodic signal with amplitude from 1 to 5V into square signal with 0 to 5V amplitude, pretty much digital one.<\/p>\n<p>In bottom right corner Atmel&#8217;s ATTiny 2313 that measures frequency of this signal and shows it on display.<\/p>\n<p style=\"text-align: center;\"><a href=\"http:\/\/www.lazarenko.us\/wp-content\/uploads\/2013\/04\/IMG_0410.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter  wp-image-499\" alt=\"IMG_0410\" src=\"http:\/\/www.lazarenko.us\/wp-content\/uploads\/2013\/04\/IMG_0410.jpg\" width=\"600\" height=\"450\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><!--more--><\/p>\n<p style=\"text-align: left;\">On the bottom USB Tiny flash programmer.<a href=\"http:\/\/www.lazarenko.us\/wp-content\/uploads\/2013\/04\/IMG_0414.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter  wp-image-495\" alt=\"IMG_0414\" src=\"http:\/\/www.lazarenko.us\/wp-content\/uploads\/2013\/04\/IMG_0414.jpg\" width=\"600\" height=\"450\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Next step in my current electronics project, after idea and schematics, is prototyping. Here is working prototype assembled on breadboard using lab equipment (like power supply etc). In top-left corner is zero-level cross detector, it converts any periodic signal with amplitude from 1 to 5V into square signal with 0 to 5V amplitude, pretty much &hellip; <a href=\"https:\/\/www.lazarenko.us\/?p=500\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Frequency meter&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9,18],"tags":[],"_links":{"self":[{"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=\/wp\/v2\/posts\/500"}],"collection":[{"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=500"}],"version-history":[{"count":9,"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=\/wp\/v2\/posts\/500\/revisions"}],"predecessor-version":[{"id":509,"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=\/wp\/v2\/posts\/500\/revisions\/509"}],"wp:attachment":[{"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lazarenko.us\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}