vonPongrac

This. Is. Awesome! =)You have my vote, mate.

It is too big for Arduino Uno. My initial plan was to use Uno, but there was not enough Flash memory.

One could say that air coil used in my instructables is a bobbin inductor (wire wraped arround a cylinder).

555 is integrated circuit. Here is more about is: https://en.wikipedia.org/wiki/555_timer_IChttp://www.ti.com/lit/ds/symlink/lm555.pdf

This instructables was made long ago... Things happen...Problem resolved.

Edited. Thanks.