Hello, I am hoping to build a temperature feedback controller using the Arduino, an op amp of some sort, and a resistive heating element. There is a thermistor built into the heating element that will allow me to measure the temperature. The feedback program is not my problem, it is how to build this circuit and with which op amp?
I need to control the heating element current between 0 and 2.5 Amps, which has a total resistance of about 10 Ohms (I am using two in parallel). Everything else can be changed in any way so as long as the circuit works. I will be using the Arduino's PWM and running it through a low-pass filter to the analog input (unless there is a better way that I am not aware of?).
The heating element is here:http://www.thorlabs.com/thorProduct.cfm?partNumber=HT10K
Which op amp will work for this system?
Do you have any other suggestions that might make the system work better?
Should I use a buffer?
Thanks a lot