- on Test & Measurement
- Published in issue 7/2015 on page 71
Resistance Measurement with the Arduino
Great for testing humidity sensors
The starting point for this project was some newish resistive air humidity sensors, whose resistance varies in the range 1 kOhm to 10 MOhm. The datasheet states expressly that they must be measured using AC. And that’s precisely what a regular ohm meter cannot do.