transformerless joule thief circuits

This a circuit very similar to a Joule Thief, except that it is using 2 transistors, no transformer core, and only one inductor. Joule Thief based on transformer page is here: I have built these two circuits today and have combined them into one- first stage is the LED torch

Joule Thief and LED torch project instructions

You can find component kits here: This page soon will contain information how to build a classic Joule Thief (Detailed instructions). Here you can see a brand new joule thief (transformer based) I have built. It can produce upto 50 volts from a fresh battery! How it looks in