i have a motherboard buzzer HYCOM mod:HY-05 i am trying to make it sound by providing 3 to 8 vdc as it says in the data-sheet but still no voice coming and i have also a buzzer KC-1206: still got the same problem ,is it possible that the two of them are damaged ?
if someone knows how to operate ( :


HYCOM mod:HY-05


  • 1
    \$\begingroup\$ PC Buzzers typically require a square wave (on/off pattern) to make a sound. Off = GND, On = 3-8V. \$\endgroup\$
    – crasic
    Jul 3, 2015 at 19:57

1 Answer 1


They may get damaged if you continue to power them with DC. Buzzers work in similar fashion with speakers but they can't reproduce a wide spectrum of audio frequencies.

Being used in the PC increases the possibility that the buzzer was fed with a square wave audio signal of a few (1 - 2 ) kHz.

I suggest you build a 555 square wave generator for your buzzers. Something similar to this, that should drive a transistor with the buzzer as load.

enter image description here

Circuit source: http://ehelion.net/projects/digitalclock/555timer.html


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