I tested the MCP4151 (-103 & -104) Poti with Arduino and collected some data.
The file /src/pot_u.cpp is used to measure the voltage of the potis voltage divider.
The file /src/pot_r.cpp is used to measure the resistance when the poti is in rheostat mode.
Coming soon...
Uncomment the file you want to upload with .cpp The .off files won't be uploaded!
The resulting data can be found under /results. For the plotted data see this repository
I controlled a power supply (SMPS) with the MCP4151 instead of a trim potentiometer. See the code under /src/pot_smps.cpp It works, but the pots lowest value is ~200 Ohm and to much to reach the voltage I wanted. Therefore I will try to inject current with the PWM output of the Arduino. --> Here
Thanks to Nathan Barnett for the MCP library. (located under /lib)