Joule Thieves

Wikipedia Entry: Joule Thief

References:
http://www.bigclive.com/joule.htm
https://rustybolt.info/ and variant 1 variant 2
http://www.buchanan1.net/joule_thief.html With experiment data!
https://ludens.cl/Electron/ledlamp/ledlamp.html
http://cappels.org/dproj/ledpage/leddrv.htm