Netduino analog input?

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#1

Hello,

I’m planning on buying a Grove Moisture sensor for my netduino but I have a problem:

seeedstudio.com/depot/grove- … 3d51f.html

This sensor has an analog output from 0 to 5 Volts, but Netduino analog inputs only allow 0 to 3.3 Volt input.

¿Has anybody faced this problem before?

¿Could anybody give me some schematics or point me in the right direction?

Thank you!

#2

Well, it’s not an issue exclusive of the moisture sensor.

It affects every analog sensor that is connected to netduino analog pins. When voltage rises over 3.3 volts, analog reads become garbage.

I would need something in between the sensors and the grove shield so the output of the sensor is corrected from 0-5 to 0.33