Arduino Uno/Mega/Nano – 1 unit Ultrasonic Sensor (HC-SR04) – For detecting hands Servo Motor (SG90) – To control the dispenser mechanism Hand Sanitizer Bottle – With ... Ensure the Arduino is powered ...

You can also use ... Arduino with a separate DC power source. The complete circuit diagram for the Arduino Automatic irrigation system is shown below: In this section, I will explain all the details ...

The below block diagram gives us a clear view of how this automatic plant watering system will work. Basically we have the Arduino Uno R4 which ... the relay output using a signal pin by providing ...