Multiple buzzers one pin no shift register

I am trying to make an extremely annoying alarm clock and as a result, I would like the noise to be as much as possible so I want to achieve this by using several buzzers. However, I am extremely low on available GPIO pins due to all the other components in the project, therefore I was wondering if it is possible to run multiple buzzers (perhaps in parallel) with the signal from one pin, since they will be making the same sound?
I would ideally not like to use shift registering as I am saving this for other components to implement as well.
If there is another way to make my sound louder I am open to suggestion as well.

Well putting it in website and forums was not the best idea.

Moved your topic to a more suitable section.

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It will help you get the best out of the forum.


As long as you don't exceed the maximum current of an IO pin (20 mA), you can hook up as many as you want.

If it exceeds that, you will need a buffer, e.g. a fet or transistor.

If you want use a MOSFET as the output device. Select a n-Channel Logic Level Avalanche protected device. Source to ground, gate to arduino pin and the drain to the buzzer - and the buzzer + to the buzzer power supply, Be sure to connect all grounds. This response is to help you get started in solving your problem, not solve it for you.
Good Luck & Have Fun!

There are WAY louder sound devices out here than buzzers... such as alarm bells.