Hi, does someone know where to get this dumet wire in Europe (Germany)?
Homemade Incandescent Light Bulb - 自作の白熱電球
Thank you a lot for helping and giving me ideas. After a little research and the tips I got from martijnruijzendaal I easily built the circuit on a tiny prototype copper strip pcb of 2,5 x 2,5 cm! The big capacitor went directly to the 12V connector, the pots wired together, added a 10k pulldown resistor for the mode switch directly onto the arduino. It was far easier than to cnc a pcb or even order it from the USA... To show how I did it, I made a little illustration. Maybe it can be helpful to anyone who wants to build it and likes soldering :)
Thanks for the links! They helped me to build the circuit on a small copper strip pcb. I hope you can see my answer to sparkitup? I'm new to instructables.com and don't know how to mention others in posts. I'm gonna add my illustration here, too. It is so easy to make and doesn't cost much. I only had to rearrange the circuit plan a little! So thanks for the link again :)
Here is a time saving layout based on the circuit from timeframe. I just did a little bit of rearranging. And it works without any problems.