I’m just beginning on the universe of Arduino, so I would like to make some questions about the connection between 3 types of sensors and Arduino:
PT100: I just read about the connection on many topics, but I would like to know if it’s possible, instead of adding an amplifier (like MAX31865), add an analog-digital converter with 24 bits (like CJMCU-1232) and send a digital signal directly to Arduino?
Inclinometer: range of measure between -1 and 1 degree, with a millimetric precision, the output is between 4 and 20 mA.
LVDT: another sensor, with properties of measuring displacements between 0 to 50 mm, the output is -2.5 to 2.5v.
Could I do the same scheme of PT100 with the ADC converter to the Inclinometer and the LVDT to send the digital signal directly to Arduino?
Another question is: how to choose the correct resistence R1.
Thank you in advance