Picture of REMIX - Single-Sided Joule-Thief

This isn’t the first Joule-Thief here on instructables. But this one has one big advantage, it has a one-sided board. It is very hard to align two layers when you make a board yourself. So if you have access to a CNC-Milling-Machine, or have everything set up to etch one yourself, this one is for you!

This board is based on the The simple Joule Thief by xBacon.

The modifications have been made by the great members of the AttraktorHacker/Maker-Space in Hamburg and was part of our LED-Build-Night.

Step 1: List of Parts

Before you begin, make sure you have gathered all parts before you begin.
  • 1x 470uH inductor (looks like a fat resistor)
  • 1x 2.2K resistor
  • 2x 1K resistor
  • 2x basic NPN transistor (2N3904, 2N2222, 2N4401, etc.)
  • 1x 1000pf (same thing as 1nf or 0.001uf) ceramic capacitor
  • 1x 1,5 volt battery + holder
  • 1x LED (or more)

Except for the inductor, these parts should be easy to find.

Step 2: The Board

Picture of The Board

If you want to etch the board yourself you can use the black and white image above.

The milling-machine will have to carve away a lot less material if you just separate the electrical parts. The G-Code I used is in the archive above.

Step 3: Milling

Picture of Milling
2014-09-25 20.49.48.jpg

Off you go and let the CNC Milling-Machine do it’s work and enjoy the simple beauty of the result.

Step 4: Solder in the parts

Picture of Solder in the parts
2014-09-27 19.06.30.jpg

I’ve annotated the parts in the screenshot above.
Once your done it should look like the photo above.

Insert an old battery and enjoy the show. 🙂