Amplifying piezo buzzer

[oscar123]

hi, i am making a motion pir detector and i made it but it rings super quietly i was wondering if any of you know how to make it louder without a transistor because i do not have many of those i have:s9015,S9014,S9013,S9012,S8550,S8050,S9018,2N5551,2N5401,A1015,C1815,2N4403

thanks for the help!

 

[Externet]

There is two different things. A piezo buzzer which contains an oscillator, usually magnetic actuator and DC driven, and a piezo disc element, which needs a much higher AC voltage to be loud.
Which is it you are working with ?

----> https://duckduckgo.com/?q=piezo+buzzer+3v&t=canonical&iax=images&ia=images

----> https://duckduckgo.com/?q=piezo+disc&t=canonical&iax=images&ia=images

 

[oscar123]

I'm working with the first one

 

[Audioguru]

We do not know if the piezo buzzer has its + terminal at the positive supply and its - terminal is driven to ground with "something", or the opposite.
If it is known then a transistor can be used to drive the piezo buzzer from a higher supply voltage.

EDIT: Sometmes the sound hole in a piezo buzzer is sealed with tape so it can be cleaned. Remove the tape and it will be much louder.

 

[Externet]

I'm working with the first one

Is it energized/powered with DC or AC in your circuit ? - What is the voltage when emits some sound ?