An alarm system built using an Arduino R3
This alarm system was built with the following materials:
- x1 Wireless breadboard
- x1 Piezo buzzer
- x1 RCWL-1601 Ultrasonic Sensor
- x3 LEDs
- x3 220 ohm resistors
- Jumper wires (as necessary)
The point of this alarm system is to alert the user when an object is nearby. To do this, the buzzer plays a tone when the object is close to the sensor. The ultrasonic sensor sends out signals and calculates the distance based on the time it took to receive the signal back. If the object gets closer to the sensor, a higher frequency is played. There are also corresponding LEDs that light up depending on where the object is.
