GHP Arduino Knock Sensor Description A simple Arduino program using a Keyes KY-031 Knock Impact Sensor. The program increments a counter every time the sensor is activated. Inspired by FizzBuzz, the ...

This Arduino project implements a GSM-based knock sensor alarm system. The system is designed to detect physical impacts or knocks using a knock sensor and send alerts via SMS and phone call to a ...

The circuit is simple, too. There is an analog input tied to a resistor and the sensor. The Arduino is perfectly capable of driving a small servo directly. Add a battery and it is done.

All it requires is a moisture sensor, a water pump, and some sort of container to hold a reserve. When the soil gets too dry, the moisture sensor will signal the pump that it's time to re-hydrate.