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In this temperature control system, we are using: Arduino Mega, LCD screen, Joy-stick, SD card, SD card module, MOSFET, 2 push buttons, MAX31865, and a power supply. Arduino Mega: It is used because ...

In this project we are going to use a two-wire PT100. This model has a resistive range from about 20 Ohm to 400 Ohm, for a temperature between −200 ° C and 850 ° C. The PT100 with three and four wires ...

This post also details the math behind the circuit design and should be a good read. The Arduino sketch does not rely on PT100RTD library mentioned above, and is much simpler, but note the circuit ...