I found a way to use a switch mode powersuply from an old computer i had laying araund as a spair. It is very easy to build and gives you 1-4 cm arcs with an input of abaut 4A.
Step 1: Warning!
This driver may under the right sercamstanses blow a fuse or eaven kill you.
DO NOT UNDER ANY SERCOMSATANSES TOCH THE HIGH VOLTAG OUT OF THE FLYBACK OR THE OUTPUT OF THE POWERSUPLY!!!!!!!!!!!!!!!!
Damag that can hapen to the SMPS can be seen below.
P.S. dont use a powersuply that is over 200W else it can explode.
i will make a new instructable soon, on a new and inprovd method. that will not self distrukt, if there are any mistakes.