I need to heat a wire and control the heat with Arduino. My setup is power supply ATX 12V has enough watt, I only need 30-40 watt or around 2.5 Amp. I'll be using two temp sensors to get feedback but need to control the heat, I though about using a hobby ESC those for brushed dc motors as it runs with a regular servo pulses, but I dont know how well it will work. How would you go about it?
I've read a digtial pot might be used but that it has some heat issues and I dont know enough about circuits to design one, or another way using a MOSFET but if I'm not mistaken the ESC (electric speed control) is built using MOSFET.
I'm curious about is it possible to control the current(amperage) sent to the wire. A PWM would be controlling the Volt although it would in theory have less heating issues then a resistance.