Joule Thief

This handy little thing takes a (also almost even dead) AA battery and holds a Joule thief circuit together with a 3mm LED.

I soldered the circuit to a 13mm by 14mm piece of perf board which fits nicely to the compartment in the front, hold in place by some hot glue.

Positive wire guess through a hole to some crumpled aluminum foil as positive terminal of battery holder.
Negative wire goes all the way back to a slot which takes a M3 nut. I squished the wire again with some aluminum foil down by pressing in the but until a M3 screw can be put through. The screw presses against the battery and holds it in place.

The holder itself has some spherical indents on the bottom to reduce warping forces during print => easy print, w/o brim or supports, no post processing for the print.

For more details on the circuit itself, please check on the description or video of Big Clive:
http://www.bigclive.com/joule.htm
https://youtu.be/K53beWYdIpc

I could never explain it that clear wi