Connect push buttons to digital pins on the Arduino UNO. Update the buttonPins array in the code accordingly. Connect the piezo buzzer to a PWM (Pulse Width Modulation) digital pin on the Arduino UNO.

For-fun experiment with an Arduino UNO, where a passive piezo-buzzer’s pitch is controlled by an ultrasonic sensor (HC-SR04). The whole idea of this “pseudo-theremin” is to obtain the proximity to the ...

After uploading the code the Piezo will start making short beeps. On bright light the Piezo will only beep and on dark light it will be short. Some ideas for this experiment: Alarm for Lights in the ...

Piezo elements have the useful property of being bidirectional; that is they can move when you apply electricity to them, but they can also generate electricity when you move them. [Carl] takes adv… ...

The project ‘SafeHaven Shield,’ is an Arduino-driven home security system seamlessly integrating RFID and PIR sensors with a keypad lock. ... an LCD when entering the house, meeting predefined ...