In this project, you will learn to design an automatic hand sanitizer.
Hardware Components:
1. Arduino Uno: - automatic hand sanitizer
#ArduinoUno board is used for interfacing the input-output elements to construct a project. It is an open-source microcontroller board that can be programmed according to user requirements.

This sensor measures the distance of an object by emitting ultrasonic waves through a transmitter. Its receiver receives the reflected signal and converts it into an electrical signal.
In this project, we use an ultrasonic sensor to recognize the presence of the hand near the nozzle of the sanitizer.

3. Servo Motor:
A servomotor is a linear or a rotatory actuator that aids in the precise control of velocity, acceleration, and angular position. It works on the principle of Pulse Width Modulation.
In this project, the servomotor is used to control the flow of the sanitizer through the nozzle or an outlet.
To learn to interface a servomotor with Arduino, click here: INTERFACING SERVO MOTOR WITH ARDUINO

Circuit Connections:
