Basically, the idea is that I'll have a temperature sensor (LM35) that will sense the temperature of a certain metal can. This metal can is subjected to heat by a gas burner, and the gas burner's output would be reduced or turned off if the metal object is at a temperature of 110 deg C, and would be increased or turned on if it falls below 100 deg C. I'm thinking of using a servomotor connected to an Arduino, connected to the PID controller, to mechanically turn off or on the valve when the can is hot or cool enough.
For Verr, I will be using a comparator circuit that is connected to a constant V source of 3V, and for the temperature sensor, I will be connecting it to a non-inverting amplifier. What gains, resistor values and additional components should I use to make it work properly?
I am also welcome for suggestions of different circuit designs,as long as it uses op-amp based PID controllers.