I am making a temperature control system using an Arduino. However, I have a problem with controlling a power resistor (which is used as a heater). I was suggested to use a MOSFET to control it. Unfortunately, my lack of knowledge about MOSFETs makes it difficult to do this.
As far as I understand a MOSFET works as a switch which turns ON when there is a voltage applied across GATE pin. When this happens, the resistance between DRAIN-SOURCE is reduced which allow current to flow. Which is nice, as I need current to heat my resistor.
If I control the PWM signal sent into the MOSFET from Arduino, does this control the current which flows through the heater?