Circuit Setup: Connect the buzzer module to the Arduino Nano as described above. Code Upload: Copy and paste the provided code into the Arduino IDE. Select the appropriate board (Arduino Nano) and ...

Relay → Pin 4 LED & Buzzer → Pin 5 I2C Display Module → SDA (A4), SCL (A5) RF Receiver Module → Pin 11 (Data Pin) All the modules are powered with 5V from the Arduino. Below is the assembled image of ...

It generates buzzer alarm when set counts or time duration is reached. Circuit Description The Circuit diagram of smart whistle counter is shown in figure-1, It is based on Arduino Mega 2560 board.