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usb heater? Answered

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.

thanks!

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Best Answer 8 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.