I currently have a setup where I am using an Arduino Mega running off a 12V battery to read 16 thermistors. I am now trying to add a variable heater to this which will consist of applying variable power to a Nichrome resistance wire. However, I am struggling to find a way to vary the power being applied to the wire which can be controlled by an arduino. Does anyone have any suggestions?
I am only interested in the power and not the actual temperature so I do not believe a PID is necessary.