This project demonstrates how to use a buzzer module with an Arduino Nano to produce sound or generate alerts. Buzzer modules can be either active or passive, each requiring different driving methods.

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.

This shield includes connections to an alarm system, a GSM modem, temperature and humidity sensors, an Ethernet module, and IR movement sensors. This Arduino Mega attaches to a control box mounted ...