I had some short lengths of wire laying around, a 1k resistor, a red LED already soldered to a transistor, and this half of a broken toroid. After a few minutes of fiddling, the result was this working Joule Thief. It shows you can make a JT that works from just about anything even if it’s half gone.
20123-03-21 Joule Thief Runs On Broken Toroid
