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