usb heater?

okay so my plan is to build a usb heater for the contest, so it can heat up coffe, hot chocolate, of tea. i am wondering if there is another way of building this than to use a cpu and resistors.

any information will help.


Re-design7 years ago
Use a resistance coil build out of nichrome wire. You'll have to figure out the length that will draw 100 ma. at 5 volts, which is the most that is safe to draw from a usb unless you design it per usb specs.
Hackrtanman (author) 7 years ago
okay thanks
Hackrtanman (author)  Hackrtanman7 years ago
what about an old hair straightener? would that work?