ageedizzleFeb 23

Do smoke detectors have little speakers inside them? If yes, would it be possible to hack them to play a little jingle?

https://piefed.ca/c/nostupidquestions/p/544264/do-smoke-detectors-have-little-speakers-inside-them-if-yes-would-it-be-possible-to-hack-the

Do smoke detectors have little speakers inside them? If yes, would it be possible to hack them to play a little jingle?

I'm asking not specifically about smoke detectors but any device that beeps but does not make any other, non-beeping sounds. Examples include micro…

Show threadFermionFeb 23

labdarna.com/…/understanding-piezo-buzzers-how-th…

They use piezo buzzers which work differently to most speakers. I would guess that the units used in smoke alarms and microwaves generally have integrated drivers that only operate at a single frequency. However, it is possible to drive piezo discs at different frequencies. Their ouput will always approximate a sound wave though, so don’t expect to be able to use them like a normal electrodynamic/ voice coil speaker to play arbitrary sounds.

Understanding Piezo Buzzers: How They Work and How to Use Them in Electronics Projects

Discover how piezo buzzers work and how to use them in your electronics projects. This guide explains their function, wiring, and applications as sound emitters and sensors.

Labdarna
Show threaddb2
You can if the buzzer signal is only used to trigger a secondary circuit that does what op is looking for.
Feb 23 at 4:32amWeb
Show threaddddontshootFeb 23
That’s what I would do. Hook jumpers from the buzzer to the play button of an mp3 player. That way if the music system fails, the buzzer still wakes you up.