Tutorial 10: Security System using an Ultrasonic Sensor HC-SR04

Components needed Ultrasonic SensorPiezo(buzzer)An LEDA resistorJumper cablesBreadboardArduino BoardA computer with the Arduino IDE installed Completed Circuit The image above is the completed circuit for the security system. We will build a simple security system using an ultrasonic sensor where if something is stolen, the piezo (buzzer) will buzz , and a red light will turn … Continue reading Tutorial 10: Security System using an Ultrasonic Sensor HC-SR04