tag:blogger.com,1999:blog-3170775607343847357.post6195168933058602310..comments2023-10-05T03:41:31.195-07:00Comments on Trail-Friendly Radio Extra: The KI6SN Trail-Friendly Joule ThiefRichard Fisher, KI6SNhttp://www.blogger.com/profile/18340648003768787724noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-3170775607343847357.post-38669758747745558292009-03-10T18:00:00.000-07:002009-03-10T18:00:00.000-07:00Bob, here is a link to the EDN site for the versio...Bob, here is a link to the EDN site for the version I built:<BR/><BR/>http://www.edn.com/contents/images/6413790.pdf<BR/><BR/>and here is a link to Dick Capples' site:<BR/><BR/>http://www.cappels.org/dproj/ledpage/leddrv.htm<BR/><BR/>better description than I could give.<BR/><BR/><BR/>73, Doug W7RDPUnknownhttps://www.blogger.com/profile/17109625445698910313noreply@blogger.comtag:blogger.com,1999:blog-3170775607343847357.post-51794453163488788622009-03-06T11:55:00.000-08:002009-03-06T11:55:00.000-08:00Just what is this circuit doing to up the voltage ...Just what is this circuit doing to up the voltage and decrease the current? Bob KI0GCutterhttps://www.blogger.com/profile/08724184226671744983noreply@blogger.comtag:blogger.com,1999:blog-3170775607343847357.post-36651677689610869292009-02-14T09:57:00.000-08:002009-02-14T09:57:00.000-08:00Hello Richard, I built something similar from a ci...Hello Richard, I built something similar from a circuit out of EDN magazine. The project was written up in the Spring 2007 ARCI QQ, I put it in an Altoids gum tin and get around 48 hours of operation running two high intensity white LEDs off a single AA battery.<BR/><BR/>73, Doug W7RDPUnknownhttps://www.blogger.com/profile/17109625445698910313noreply@blogger.com