Doc Freemo 
I love running 40V across 0.5mm pencil lead and watching it evaporate into gas in a flash of blinding white light :)
@freemo Did you mean 40A?
@skobkin no, 40V but i should have said 3.2A since it is current limited and for short runs of pencil "lead" it is only running at about 5V.
@freemo
Yeah, I guess 3.2A will make it quite hot too 
Need to try that myself I guess.
@skobkin just use it to short a 12V car battery and it will go up pretty fast.
@freemo
I have 4 UPS batteries at my disposal, but they're perfectly balanced and I'm not sure if I should do that to them.
But I have a couple of power supplies. Can use them. Still need to buy this graphite for pencil though.
@freemo
I can deal with that