Homebrew PCBs

Stefan Trethan wrote:
> <https://www.asseenontvnetwork.com/vcc/coldheat/coldheat/faq/115261/#8>
> I already have a arc welder - no, thanks.
> 
> any ideas how it really works?
> 

My guess it contains a EHT and diode/capacitor connected to some
cleverly designed electrode arrangement. If you have a DC arc the
positive electrode gets a lot hotter than the negative electrode because
of electron bombardment. Notice there is absolutely no control over
temperature.