Have you made the Joule Thief yet? If not, get this is your reminder to watch the video, download the PDF and get cracking! Subscribe in iTunes and get the pdf and the video downloaded automatically! – Subscribe Link
Joule Thief Video Podcast – Link
Joule Thief PDFcast – Link
Windell’s further description and explanation – Link
here’s another source of information and circuit ideas for the simple switching led driver
http://www.cappels.org/dproj/ledpage/leddrv.htm