This is a simple arduino project for a soil moisture sensor that will light up a LED at a certain moisture ... This variable resistor is connected in a voltage divider configuration, and Arduino ...

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 ...

Because of the affordability and seeming ubiquity of the Arduino platform, they have been hard at work this last month trying to get their Geiger counter sensor board for an Arduino out the door.

It’s an easy to build high voltage ... Arduino to something that will arc an inch and a half. The next step building the flyback driver. [Andrew] used a MOSFET and MOSFET driver for this circuit ...