{"id":7126,"date":"2013-04-19T08:00:34","date_gmt":"2013-04-19T15:00:34","guid":{"rendered":"http:\/\/rustybolt.info\/wordpress\/?p=7126"},"modified":"2013-05-31T08:25:08","modified_gmt":"2013-05-31T15:25:08","slug":"2013-04-19-tbd","status":"publish","type":"post","link":"https:\/\/rustybolt.info\/wordpress\/?p=7126","title":{"rendered":"2013-04-19 Dual Core Joule Thief"},"content":{"rendered":"<p><a href=\"http:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2013\/04\/DSC_0016S2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-7459\" alt=\"DSC_0016S2\" src=\"http:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2013\/04\/DSC_0016S2-300x202.jpg\" width=\"300\" height=\"202\" srcset=\"https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2013\/04\/DSC_0016S2-300x202.jpg 300w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2013\/04\/DSC_0016S2.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>When the winding gets tough, double up the number of toroid cores, I say.\u00a0 This JT uses toroid cores that are less than 1\/4 inch (6.4mm) outside diameter.\u00a0 The wire has to be fine to get several inches wound on a core.\u00a0 So I wound one core with the wire, and then coupled it to a second core by putting a single turn loop of heavy wire through both and soldering it.\u00a0 Then the second core could hold the remaining turns of wire.\u00a0 The cores are closely coupled electromagnetically, so they sort of act as a single core.<\/p>\n<p>The cores don&#8217;t have to be small to be coupled together with a single turn.\u00a0 Two large cores could be coupled, as could two cores of different sizes.\u00a0 However, if they&#8217;re different sizes or different magnetic properties, that may affect the way they work in the Joule Thief.\u00a0 I&#8217;ve never seen any documents on this method, so I wouldn&#8217;t know what to expect if they were different.\u00a0 This might make a good topic for some major experimentation.\u00a0 Perhaps someone could use it as a topic for a thesis in college.<\/p>\n<p>Back to experimenting&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When the winding gets tough, double up the number of toroid cores, I say.\u00a0 This JT uses toroid cores that are less than 1\/4 inch (6.4mm) outside diameter.\u00a0 The wire has to be fine to get several inches wound on a core.\u00a0 So I wound one core with the wire, and then coupled it to<a href=\"https:\/\/rustybolt.info\/wordpress\/?p=7126\"> <\/p>\n<p> (Read More&#8230;)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,78,4],"tags":[],"class_list":["post-7126","post","type-post","status-publish","format-standard","hentry","category-magnetics-electromagnetics","category-inductors","category-joule-thief-smps-dc-dc"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7126"}],"version-history":[{"count":9,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7126\/revisions"}],"predecessor-version":[{"id":7462,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7126\/revisions\/7462"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}