3 input Buzzer FGM question[solved]

[typematrix]

Hi

I found this buzzer in a carbon monoxide alarm I  was throwing  out.
Must be 10 years old or so It was powered by 3-4 AA batteries.
Its has 3 pins marked  F G M
Markings (Made IN Korea  by SUN JIN) no part number.

I am trying to make it buzz  , want to add to an alarm i am making.

I been doing a bit research and found this circuit,  I set it up but nothing happened.
https://electronics.stackexchange.com/questions/18212/whats-the-third-wire-on-a-piezo-buzzer

Any links or ideas here ,  The buzzer in the alarm  was working before I took it apart.
thanks

links to image of buzzer.

[Wimberleytech]

Hi

I found this buzzer in a carbon monoxide alarm I  was throwing  out.
Must be 10 years old or so It was powered by 3-4 AA batteries.
Its has 3 pins marked  F G M
Markings (Made IN Korea  by SUN JIN) no part number.

I am trying to make it buzz  , want to add to an alarm i am making.

I been doing a bit research and found this circuit,  I set it up but nothing happened.
https://electronics.stackexchange.com/questions/18212/whats-the-third-wire-on-a-piezo-buzzer

Any links or ideas here ,  The buzzer in the alarm  was working before I took it apart.
thanks

links to image of buzzer.

That is the correct circuit.  It should work.  Once wired, have you varied the power supply to see where oscillation starts?  Show us your circuit...

Also try increasing the collector resistor to, maybe, 2k or so.

[soldar]

I googled three terminal buzzer and found https://electronics.stackexchange.com/questions/18212/whats-the-third-wire-on-a-piezo-buzzer

[typematrix]

I got it working by changing  the resistor values as suggested.

Thanks