Simple Soil Moisture Meter with 741

Posted on Aug 19, 2012

Stick the metal probes into a freshly watered plant and adjust R5 for a mid-scale meter deflection. The meter will monitor the soil wetness and the meter will indicate whether it is to moist or to dry. This circuit uses a dual power supply which could be created by two 9 volt batteries.

Simple Soil Moisture Meter with 741
Click here to download the full size of the above Circuit.

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