{"id":3011,"date":"2012-06-03T09:47:38","date_gmt":"2012-06-03T16:47:38","guid":{"rendered":"http:\/\/rustybolt.info\/wordpress\/?p=3011"},"modified":"2012-08-14T20:19:13","modified_gmt":"2012-08-15T03:19:13","slug":"2012-06-03","status":"publish","type":"post","link":"https:\/\/rustybolt.info\/wordpress\/?p=3011","title":{"rendered":"2012-06-03 Watson’s Waterproof LED Flashlight"},"content":{"rendered":"

\"\"<\/a>This pic is dated Nov 2003, which was about the time I built the light.\u00a0 It was one of my early creations.\u00a0 I built the circuit which used two transistors (not a true Joule Thief), a toroid, and three white LEDs. Most impottantly it used two AA cells in\u00a0 series, which was kind of odd for the time.\u00a0 The frame (I hesitate to call it an enclosure:-) was made from two short pieces of angle aluminum bolted to the bottom, a flat piece of aluminum.\u00a0 The board and 2 AA cell holder were also bolted on.\u00a0 It fit comfortably in the hand.<\/p>\n

Since it was open frame, I decided I wanted to coat it wit a thick coating.\u00a0 I bought a spray can of Grip & Guard, which is supposed to be used to put a thick coating on the handles of tools.\u00a0 But the terms spray and thick coating are mutually exclusive: in order to get the can to spray, the fluid has to be thin.\u00a0 I coated it with dozens of coats and you can see how thick it was in\u00a0 the picture.\u00a0 The only thing I really did was to get the switch gummed up so it was hard to turn on.\u00a0 No, I really did not intend it to be waterproof.<\/p>\n

The circuit lights the LEDs very brightly; in fact too brightly with fresh alkaline AA cells.\u00a0 So I had to use depleted cells or else two Ni-MH rechargeable cells.\u00a0 I still use it in some drawer somewhere.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

This pic is dated Nov 2003, which was about the time I built the light.\u00a0 It was one of my early creations.\u00a0 I built the circuit which used two transistors (not a true Joule Thief), a toroid, and three white LEDs. Most impottantly it used two AA cells in\u00a0 series, which was kind of odd <\/p>\n

(Read More…)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,4,12],"tags":[],"class_list":["post-3011","post","type-post","status-publish","format-standard","hentry","category-flashlight","category-joule-thief-smps-dc-dc","category-led"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/3011","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=3011"}],"version-history":[{"count":11,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/3011\/revisions"}],"predecessor-version":[{"id":3672,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/3011\/revisions\/3672"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}