BIG 8051 Manual
9
Piezo Buzzer
Piezo buzzers are used for making beeps, tones, and alerts. To use, one pin has to be connected
to the ground (in schematic) and the other pin to a square wave out from a timer or microcon-
troller. For the loudest tones, stay around 4KHz. This buzzer gives the BIG8051 development
system the ability to emit audio signals. Best performance for our Piezo buzzer can be achieved
with frequencies between 2KHz and 4KHz. To make a connection between the piezo buzzer
and the microcontroller, it is necessary to set switch 8 on the DIP switch SW13 to the ON posi-
tion . The figure currently shows it in off position.
Piezo buzzer connected to the microcontroller
Piezo buzzer and connection schematic [5]
Piezo buzzer
