This is a simple arduino project for a soil moisture sensor that will light up a LED at a certain moisture level. It uses Arduino Duemilanove microcontroller board. Two wires placed in the soil pot ...

If you are designing your own intelligent “Graden Computer” with an optional digital plant moisture sensor/water pump controller that lights an LED to alert the user when it is time to water a potted ...

In a way, the magic of a soil moisture ... informed his own sensor design. At its heart, a moisture sensor measures how quickly (or slowly) a capacitor charges through a resistor, but in these ...