Example code for creating musical New Year effects with Arduino and a piezo buzzer. #define NOTE_C4 262 #define NOTE_D4 294 #define NOTE_E4 330 #define NOTE_G4 392 #define NOTE_A4 440 #define NOTE_B4 ...

Here’s a project that integrates an RFID reader, a servo motor, an LCD, 3 LEDs, and a 2-pin piezo buzzer with Arduino. This setup can be used to create an access control system where the RFID reader ...

Our schematic consists on 3 elements which are: Photoresistor (LDR), Piezo Buzzer, 1 – 10 kΩ. The LDR can be connected any way you want because doesn’t have polarity. For resistance you can use from 1 ...