Ok guys so i notice alot of helpful talk about the battery and how it may explode, and the types of think wire that will glow. e.g nichrome, guitar string, bulb filament etc.
And so basically, to test the wire i choose, to experiment with it. what sort of power am i using??? your saying batteries. why not an AA like the link says? im trying to understand how much current i can get from a battery (as current heats the wire, not voltage) and how i can boost the current.
I was looking at homemade welders, and how the transformers welders use are wired to provide low voltage, and high current...as the current is the heat.
another question, when you say "privide 70 amps" to me 70 amps sounds like a crazy and dangerous amount. like... i have 30A 240V mains voltage, and im aware that 1A can kill you...
So how do batteries put out 70A, and why dont you die when you touch the terminals??? same as car batteries, hundreds of amps available, but no death when you touch terminals.
Can someone please explain all this to me if you can, because i have always wanted to know..