{"id":965,"date":"2012-01-28T10:08:59","date_gmt":"2012-01-28T18:08:59","guid":{"rendered":"http:\/\/rustybolt.info\/wordpress\/?p=965"},"modified":"2012-03-14T18:54:47","modified_gmt":"2012-03-15T01:54:47","slug":"2012-01-28","status":"publish","type":"post","link":"https:\/\/rustybolt.info\/wordpress\/?p=965","title":{"rendered":"2012-01-28 Blood Red Vampire Joule Thief"},"content":{"rendered":"<p><a href=\"http:\/\/rustybolt.info\/wordpress\/?attachment_id=1123\" rel=\"attachment wp-att-1123\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-1123\" title=\"DSC_0009S4\" src=\"http:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2012\/01\/DSC_0009S4-300x199.jpg\" alt=\"\" width=\"300\" height=\"199\" srcset=\"https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2012\/01\/DSC_0009S4-300x199.jpg 300w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2012\/01\/DSC_0009S4.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>One of the earliest germanium transistors was the 2N404.\u00a0 It became a popular transistor for use in projects after the demand for germanium transistors fell when Texas Instruments and other companies started selling silicon transistors (for more transistor history see <a href=\"http:\/\/semiconductormuseum.com\/Museum_Index.htm\">here<\/a>).\u00a0 I recently bought some germanium transistors labeled 2N404, but they seem to have much higher current gain than the original 2N404s.\u00a0 No matter, they make excellent vampire Joule Thiefs, because they will drain every last drop of blood.. er, juice from a battery.\u00a0 Here in a picture I show the LED still glowing red as the battery measures 0.278 volts.\u00a0 The silicon transistor JTs would have stopped working at a voltage somewhat under a half volt.\u00a0 Admittedly the LED is dim, but it\u00b4s still working!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the earliest germanium transistors was the 2N404.\u00a0 It became a popular transistor for use in projects after the demand for germanium transistors fell when Texas Instruments and other companies started selling silicon transistors (for more transistor history see here).\u00a0 I recently bought some germanium transistors labeled 2N404, but they seem to have much<a href=\"https:\/\/rustybolt.info\/wordpress\/?p=965\"> <\/p>\n<p> (Read More&#8230;)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,12],"tags":[],"class_list":["post-965","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\/965","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=965"}],"version-history":[{"count":11,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/965\/revisions"}],"predecessor-version":[{"id":1533,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/965\/revisions\/1533"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=965"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=965"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=965"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}