Heating is performed through the thermal effect of current, and the power is P=I^2R;
You can add a temperature control switch like me for rough temperature control;
You can also directly short-circuit it, then it will heat up and eventually reach thermal equilibrium.
The calculation formula for resistance can be calculated here ;
I don't consider the temperature rise here, I just consider the calculation of power and resistance. If you want to achieve 10W power through 5V power supply, you need to adjust the resistance to about 2.5Ω, and then adjust the wire length and line width.
The following is the data I tested: adjust the line width to 0.5; the line length is 2500mm, and the approximate resistance is 2.5Ω
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