Specification Working voltage 3 5 5 5VWorking current 25mAPCB Dimension 18 5mm x 15mm L x W Feature No oscillation source need square wave frequency 2K 5K to drive Sound frequency control you can make a do re mi fa sol la si effect Package included 20 x Standard Passive Buzzer Modulereference source programme int buzzer 8 Set the control the buzzer digital IO pinvoid setup pinMode buzzer OUTPUT Setting the digital IO pin mode OUTPUT is Wen out void loop unsigned char i j Define the variablewhile 1 for i 0 i80 i Wen a frequency sound digitalWrite buzzer HIGH Sounddelay 1 delay 1msdigitalWrite buzzer LOW Not sounddelay 1 delay 1ms for i 0 i100 i Wen out another frequency sound digitalWrite buzzer HIGH Sounddelay 2 delay 2msdigitalWrite buzzer LOW Not sounddelay 2 delay 2ms After downloading the program the buzzer experiments are finish