Hi i would like to replace a 10 k trimmer on a boiler central board with a software controlled arduinoboard to change some work logic of the boiler.
IN essential is it possible to emulate a simple variable linear resistor with an arduino port? and how?
I wish you a merry new year and i would liek to thank you all for your support.
Alessandro
is it possible to emulate a simple variable linear resistor with an arduino port?
No, but you can control a [u]digital potentiometer[/u] with the Arduino.
With a digital pot you have to be careful about the voltages, and realize that it's not totally isolated fro the power supply & control signals.
You'd better be sure exactly what that trimmer does!..
Many modern consumer devices use power supplies which are NOT isolated from the mains input. If that's true for your boiler this isn't at all easy
regards
|Allan