{"id":2990,"date":"2012-05-31T09:28:27","date_gmt":"2012-05-31T16:28:27","guid":{"rendered":"http:\/\/rustybolt.info\/wordpress\/?p=2990"},"modified":"2012-06-08T02:17:03","modified_gmt":"2012-06-08T09:17:03","slug":"2012-05-31-joule-thief-powered-by-solar-cell-super-capacitors","status":"publish","type":"post","link":"https:\/\/rustybolt.info\/wordpress\/?p=2990","title":{"rendered":"2012-05-31 Joule Thief Powered By  Solar Cell, Super Capacitors"},"content":{"rendered":"<p><a href=\"http:\/\/rustybolt.info\/wordpress\/?attachment_id=3079\" rel=\"attachment wp-att-3079\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-3079\" title=\"DSCN1201S2\" src=\"http:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2012\/05\/DSCN1201S2-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2012\/05\/DSCN1201S2-300x225.jpg 300w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2012\/05\/DSCN1201S2.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>This is another of my pictures originally posted to my warsonseblog in 2009.\u00a0 This uses a whole board full of 1F 2.5VDC super capacitors I got from an online surplus sales, I don&#8217;t remember which.\u00a0 I think they were all used since the leads were short.\u00a0 At that time I don&#8217;t believe that super caps bigger than 1 Farad were available, at least not for a reasonable price.<\/p>\n<p>The Flashing JT uses a two transistor astable multivibrator circuit with assymetrical part values to make it stay off for much longer than half the time.\u00a0 The third transistor is the driver, which switches only the base current to the final Joule Thief transistor.\u00a0 This circuit uses more current than my <a href=\"http:\/\/rustybolt.info\/wordpress\/?p=152\"><strong>Blue Blinky<\/strong><\/a>, but the flash is brighter due to the LED being on longer.<\/p>\n<p>The solar cell is tiny and supplies only 20 mA on a really sunny day.\u00a0 This disappears into the 20 farads like a cup of water into an empty swimming pool. It takes quite a while for the bank of super caps to charge up.<em><\/em><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is another of my pictures originally posted to my warsonseblog in 2009.\u00a0 This uses a whole board full of 1F 2.5VDC super capacitors I got from an online surplus sales, I don&#8217;t remember which.\u00a0 I think they were all used since the leads were short.\u00a0 At that time I don&#8217;t believe that super caps<a href=\"https:\/\/rustybolt.info\/wordpress\/?p=2990\"> <\/p>\n<p> (Read More&#8230;)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,34],"tags":[],"class_list":["post-2990","post","type-post","status-publish","format-standard","hentry","category-joule-thief-smps-dc-dc","category-renewable-energy"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2990","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=2990"}],"version-history":[{"count":15,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2990\/revisions"}],"predecessor-version":[{"id":3089,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2990\/revisions\/3089"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2990"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2990"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2990"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}