{"id":1933,"date":"2011-03-04T13:13:34","date_gmt":"2011-03-04T18:13:34","guid":{"rendered":"http:\/\/embedded-lab.com\/blog\/?p=1933"},"modified":"2012-07-30T09:29:22","modified_gmt":"2012-07-30T13:29:22","slug":"555-contest-entry-direct-conversion-rf-receiver-for-80-meter-amateur-band","status":"publish","type":"post","link":"https:\/\/embedded-lab.com\/blog\/555-contest-entry-direct-conversion-rf-receiver-for-80-meter-amateur-band\/","title":{"rendered":"555 Contest Entry: Direct conversion RF receiver for 80 meter amateur band"},"content":{"rendered":"<p>Direct conversion RF receivers are different from the standard superheterodyne one as they don&#8217;t have IF stage, and so the radio signals are directly converted into audio signals. This <a href=\"http:\/\/555designs.blogspot.com\/2011\/02\/555-design-contest-entry-direct.html\" target=\"_blank\">project<\/a> uses 3 555 timer ICs as the only active devices to construct a <a href=\"http:\/\/555designs.blogspot.com\/2011\/02\/555-design-contest-entry-direct.html\" target=\"_blank\">direct-conversion radio receiver<\/a> for the 80 meter amateur radio band.<!--more--><\/p>\n<p style=\"text-align: center;\"><a href=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2011\/03\/555Radio.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1934 aligncenter\" title=\"555Radio\" src=\"http:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2011\/03\/555Radio-550x412.jpg\" alt=\"\" width=\"550\" height=\"412\" srcset=\"https:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2011\/03\/555Radio-550x412.jpg 550w, https:\/\/embedded-lab.com\/blog\/wp-content\/uploads\/2011\/03\/555Radio.jpg 640w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/a><\/p>\n<p style=\"text-align: center;\">\n<p><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><\/p>\n<p><script src=\"http:\/\/pagead2.googlesyndication.com\/pagead\/show_ads.js\" type=\"text\/javascript\">\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Direct conversion RF receivers are different from the standard superheterodyne one as they don&#8217;t have IF stage, and so the radio signals are directly converted into audio signals. This project uses 3 555 timer ICs as the only active devices to construct a direct-conversion radio receiver for the 80 meter amateur radio band.<\/p>\n","protected":false},"author":1,"featured_media":1934,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[201],"tags":[203,210,209],"class_list":["post-1933","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-555-timer","tag-555-timer-2","tag-amateur-radio","tag-rf-receiver"],"_links":{"self":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/1933","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=1933"}],"version-history":[{"count":4,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/1933\/revisions"}],"predecessor-version":[{"id":1938,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/posts\/1933\/revisions\/1938"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media\/1934"}],"wp:attachment":[{"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/media?parent=1933"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/categories?post=1933"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/embedded-lab.com\/blog\/wp-json\/wp\/v2\/tags?post=1933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}