Automatic hand sanitizer dispenser

This document describes an automatic hand sanitizer dispenser system using an Arduino Uno microcontroller. The system uses an ultrasonic sensor to detect when a hand is placed within 90cm of the dispenser, which then activates a servo motor to dispense the sanitizer. A flowchart shows the detection and dispensing process. A circuit diagram and component list with estimated costs are provided. The document concludes that such automatic dispensers should be installed in various public places to help prevent the spread of COVID-19 through improved hand sanitization.