Moisture Detection With Two Nails

Here's a really simple way to detect moisture in plant soil.You'll need:An ArduinoTwo steel nailsone 10k ohm resistorsome lengths of wiresoldering ironsolder The Contraption The layout is dead simple:One nail goes to the +5V line on the Arduino. The other nail goes to an analogue pin (zero in my ...

By: ronnietucker

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