Let's Make Robots!

Regulated Joule thief, how?

Many of you have seen or read about a Joule thief, and for the rest of you: http://en.wikipedia.org/wiki/Joule_thief. They come in a great varieties, google easily finds them. One thing that I like about the Joule thief is that it is so forgiving about the applied transformer, the circuit simply adapts to that ever you throw after it. No need for calculations or anything.