{"id":914,"date":"2012-01-25T09:09:46","date_gmt":"2012-01-25T17:09:46","guid":{"rendered":"http:\/\/rustybolt.info\/wordpress\/?p=914"},"modified":"2012-03-17T17:17:27","modified_gmt":"2012-03-18T00:17:27","slug":"2012-01-25","status":"publish","type":"post","link":"https:\/\/rustybolt.info\/wordpress\/?p=914","title":{"rendered":"2012-01-25 10 Farad Powered Joule Thief Flasher"},"content":{"rendered":"<p><a href=\"http:\/\/rustybolt.info\/wordpress\/?attachment_id=1076\" rel=\"attachment wp-att-1076\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-1076\" title=\"DSCN1240S3\" src=\"http:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2012\/01\/DSCN1240S3-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2012\/01\/DSCN1240S3-300x225.jpg 300w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2012\/01\/DSCN1240S3.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Another pic from the past &#8211; Apr 2009. The 10 Farad supercapacitor powers the flasher brightly for 1 hour and dims for another 3 hours.<\/p>\n<p>The circuit consists of an astable multivibrator with unequal resistors to make it put out a short pulse every second or so.\u00a0 This is the three transistors to the left of the power wires.\u00a0 To the right of the power wires is a Joule Thief that has its 1k resistor fed by the pulses from the astable multivibrator, gating the JT on and off.\u00a0 The output from the JT is rectified and filtered before it gets to the LED.\u00a0 The extra holes in the board are for different configurations.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Another pic from the past &#8211; Apr 2009. The 10 Farad supercapacitor powers the flasher brightly for 1 hour and dims for another 3 hours. The circuit consists of an astable multivibrator with unequal resistors to make it put out a short pulse every second or so.\u00a0 This is the three transistors to the left<a href=\"https:\/\/rustybolt.info\/wordpress\/?p=914\"> <\/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":[4,12],"tags":[],"class_list":["post-914","post","type-post","status-publish","format-standard","hentry","category-joule-thief-smps-dc-dc","category-led"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/914","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=914"}],"version-history":[{"count":18,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/914\/revisions"}],"predecessor-version":[{"id":1646,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/914\/revisions\/1646"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=914"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=914"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=914"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}