{"id":705,"date":"2013-12-07T12:56:33","date_gmt":"2013-12-07T07:26:33","guid":{"rendered":"http:\/\/brainstorms.in\/?p=705"},"modified":"2014-04-21T15:12:38","modified_gmt":"2014-04-21T09:42:38","slug":"plug-and-play-dds-vfo-with-arduino","status":"publish","type":"post","link":"https:\/\/brainstorms.in\/?p=705","title":{"rendered":"Plug and Play DDS VFO with arduino"},"content":{"rendered":"<p>I have been trying to program\u00a0 cheap Chinese DDS modules recently.\u00a0\u00a0 I wanted to\u00a0 add a DDS VFO to one of my bitx rigs. These modules are available\u00a0 at $4.5 from aliexpress. They claim that it can work up to 40Mhz.<\/p>\n<p>I used an arduino Uno along with a rotary encoder for\u00a0 controlling the module.\u00a0The DDS module pin out is shown below.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"http:\/\/brainstorms.in\/wp-content\/uploads\/2013\/12\/DDS_module_pinout.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-707\" src=\"http:\/\/brainstorms.in\/wp-content\/uploads\/2013\/12\/DDS_module_pinout-286x300.png\" alt=\"DDS_module_pinout\" width=\"286\" height=\"300\" srcset=\"https:\/\/brainstorms.in\/wp-content\/uploads\/2013\/12\/DDS_module_pinout-286x300.png 286w, https:\/\/brainstorms.in\/wp-content\/uploads\/2013\/12\/DDS_module_pinout.png 475w\" sizes=\"auto, (max-width: 286px) 100vw, 286px\" \/><\/a><\/p>\n<p>The connections to arduino and rotary encoder is\u00a0 shown below.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"http:\/\/brainstorms.in\/wp-content\/uploads\/2013\/12\/dds_bb.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-708\" src=\"http:\/\/brainstorms.in\/wp-content\/uploads\/2013\/12\/dds_bb-300x222.jpg\" alt=\"dds_bb\" width=\"300\" height=\"222\" srcset=\"https:\/\/brainstorms.in\/wp-content\/uploads\/2013\/12\/dds_bb-300x222.jpg 300w, https:\/\/brainstorms.in\/wp-content\/uploads\/2013\/12\/dds_bb.jpg 808w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>You can download the code hosted on github <a title=\"Git rep for DDS\" href=\"https:\/\/github.com\/vu2swx\/ddsvfo\">from\u00a0 here.\u00a0<\/a><\/p>\n<p>The code is for 40m VFO\u00a0\u00a0\u00a0 with IF of 9Mhz.\u00a0 You can easily modify it for other\u00a0 bands and IFs. Additional functions can be programmed easily.<\/p>\n<p>The DDS modules\u00a0 are available on line form from many sources. The rotary encoder can be obtained from <a href=\"http:\/\/in.element14.com\/encoders\">element14<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I have been trying to program\u00a0 cheap Chinese DDS modules recently.\u00a0\u00a0 I wanted to\u00a0 add a DDS VFO to one of my bitx rigs. These modules are available\u00a0 at $4.5 from aliexpress. They claim that it can work up to 40Mhz. I used an arduino Uno along with a rotary encoder for\u00a0 controlling the module.\u00a0The&hellip; <a href=\"https:\/\/brainstorms.in\/?p=705\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Plug and Play DDS VFO with arduino<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,7,9],"tags":[],"class_list":["post-705","post","type-post","status-publish","format-standard","hentry","category-electronics","category-ham-radio","category-micro-controllers"],"_links":{"self":[{"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/posts\/705","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/brainstorms.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=705"}],"version-history":[{"count":7,"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/posts\/705\/revisions"}],"predecessor-version":[{"id":717,"href":"https:\/\/brainstorms.in\/index.php?rest_route=\/wp\/v2\/posts\/705\/revisions\/717"}],"wp:attachment":[{"href":"https:\/\/brainstorms.in\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/brainstorms.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/brainstorms.in\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}