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 ...

This is a simple arduino project for a soil moisture sensor that will light up a LED at a certain moisture ... I love all about electronics, circuit diagrams and crazy projects that can help us ...

In a way, the magic of a soil moisture sensor’s functionality boils down to a simple RC circuit. But of course ... how it informed his own sensor design. At its heart, a moisture sensor measures ...

Perhaps we should build some of [MakersFunDuck]’s Moisture Duck boards ... A fixed resistor creates a voltage divider with the soil, and dry soil has higher resistance than moist soil.