![]() Switch is connected to port P3 which remains at logic HIGH by pull up resistor.Īccording to the code: The buzzer is interfaced to Port P1 of the microcontroller and simple ON/OFF program is written as an example using delay in between them. ![]() The output is in current source mode so that buzzer will turn ON when the output of the port is logic LOW. This type of connection is possible, if the current requirements of the buzzer is not more than 20mA. The port P1 of the microcontroller is connected to buzzer. When a push button is pressed, the buzzer will get ON and OFF ( number of times set in the code) and then stops. This project shows the interface with AT89S52 microcontroller to a buzzer. Here, i world like to discuss the interfacing of a small buzzer with 8051 microcontroller and how different projects can be constructed. It can be used as electronic bell or as quiz buzzer in many applications around us. ![]() Buzzer is a electronic device that converts the electronic signal into buzzing noise, that is applied to it.
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