I'm currently learning about electronics so I bought myself a variable power supply - something I think will be useful over the coming years. I would like to know if I use a hot wire cutter (most likely nichrome wire? polystyrene cutting pen from ebay - link at the bottom of this post) then could I use my variable power supply to power it rather then getting a separate transformer?
The power supply I have is around 20v up to 25a and it has a dial to change the voltage. I was wondering if I dialled the voltage to 6v will the heating element just take enough current required to heat up or will it be greedy, shoot up to 20 or so amps then melt? If so then might there be a good option to limit the current?
Just to assure - I looked through many posts on here and couldn't find something specific to this (perhaps I just wasn't sure what to look for and peoples posts on using a variable pot to control power to a heating element says all).