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How can I make a USB driven heating element? Answered

How can I make (if it is even possible) a heating element that runs off usb, and produces enough heat to burn a (tiny) piece of wood to the point of producing smoke?

2 Replies

frollard (author)2013-02-17

As steve says, half a watt isn't much power, but it can get hot if it's not heating much thermal mass.

By tiny piece of wood do you by chance mean herbal vapourizer?

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steveastrouk (author)2013-02-17

The biggest load you can put on a USB circuit without asking for power is 5/0.1 or 50 Ohms. Wind yourself a 50 Ohm resistor out of thin nichrome wire and see what it will do.


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