Interesting. I’ve never heard of a piezoelectric buzzer before. This is the answer I was looking for. Thanks!
gedaliyah@lemmy.world 1 day ago
Usually it’s not exactly a speaker, but it does involve a controlled moving diaphragm. In a piezoelectric buzzer, a current applied to the diaphragm causes it to oscillate, and the size and shape of the diaphragm determines the tone AFAIK.
It may be theoretically possible to engineer such a device into a rudimentary speaker. I mean, people have done it with Tesla coils and player pianos, so hey, anything is possible?
ageedizzle@piefed.ca 15 hours ago
CameronDev@programming.dev 1 day ago
You can also make hard drive heads play music. Poor quality music, but music.
Multiple piezoelectric buzzers could probably play a tune if you tune them to individual notes. Not sure how to tune them, but probably cutting them, or putting bluetak on them would alter their note.
ageedizzle@piefed.ca 17 hours ago
How does this work?
CameronDev@programming.dev 16 hours ago
A basic speaker is functionally a copper coil next to a permanent magnet. A hard drive head (although I guess more specifically read arm?) is also a copper coil next to a permanent magnet. So if you push an audio signal through the coil, it vibrates and makes sound. It’s missing the diaphram/cone part of the speaker, so it’ll be very tinny.
If you want to make one yourself, get a broken hard drive, and an old pair of headphones, and connect the wires to the coil and play some music.
instructables.com/Hard-Drive-Speaker-More-Instruc…
slazer2au@lemmy.world 20 hours ago
Don’t forget floppy drives
CameronDev@programming.dev 20 hours ago
Never tried floopy drives, good acoustics?
slazer2au@lemmy.world 20 hours ago
Have you not seen Flopatron?
Apologies for the YouTube link but I don’t think he posts things anywhere else.
www.youtube.com/@PaweZadrozniak