The soil moisture sensor module , built around the LM393 comparator, gives an active-low (L) level output when the soil is dry (determined by a pre-setted threshold value). This digital output (wet ...

These projects are perfect for Arduino ... You'll need the sensor module R305 to read your fingerprint and a list of other connectors to link the ... An Arduino-based door knock sensor.

The Arduino Sensor Kit comes as a standalone kit for only €23.00 or $23.00, or can be purchased with the Arduino UNO Rev3 board as a great value bundle for €38.70 or $38.70.