book collections email follower instructable user
Picture of Easy Joule Thief LED Harry Potter Wand

This is an instructable on how to make your own LED wand with a Joule Thief. It is inspired by Harry Potter and used at a LARP.

It´s very easy an can be done by nearly everyone in one day.

Step 1: What You Need:

Picture of What You Need:

you need:

  • a plastic part for the battery and the electronics, it is used as a handle in the end. I used a plastic LED candle from a dollar store
  • a round piece of wood for the wand
  • some acrylic paint
  • hot glue
  • no-more-nails-glue (optional)
  • a lighter to soften the hot glue (optional)
  • an AAA battery
  • some wires
  • an LED, I used a white one with a big angle
  • 1 NPN (BC547) and 1 PNP (BC557) transistor
  • one 1k Ohm and one 33k Ohm resistors
  • one 10nF ceramic capacitor
  • one inductor between 220µH and 510µH (I used 330µH)
  • one push button

I got the Joule Thief circuit from DangerousTim. But i will explain it also in the following.

Nice idea. This is probably the best looking joule thief design that I have seen.