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Piezo sourcing help?

K

Kate Broughton

Jan 1, 1970
0
Does anyone know where I could buy a handful of piezoceramic vibration
units, of the type used in mobiles/cellphones? I can only find people
selling them by the thousand.

Also, does anyone know where I could find out more about these things,
in layman's language? I'm interested to know things like how much power
they use, whether they can be made to vibrate at different
intensities/frequencies (by altering voltage?), what sizes they come
in, and all sorts of basic questions. I've an idea I want to try to
build, an am quite technically competent, but don't know the first
thing about electronics! Any help appreciated.

Thanks

Kate

PS - if you want to email me, you'll need to edit the address!
 
J

John Fields

Jan 1, 1970
0
Does anyone know where I could buy a handful of piezoceramic vibration
units, of the type used in mobiles/cellphones? I can only find people
selling them by the thousand.

Also, does anyone know where I could find out more about these things,
in layman's language? I'm interested to know things like how much power
they use, whether they can be made to vibrate at different
intensities/frequencies (by altering voltage?), what sizes they come
in, and all sorts of basic questions. I've an idea I want to try to
build, an am quite technically competent, but don't know the first
thing about electronics! Any help appreciated.

---
Try this:

http://www.piezo.com/tech2intropiezotrans.html

And then, for more, this:

http://www.google.com/search?hl=en&lr=&q=Piezo+bender+bimorph+transducer
 
J

Jasen Betts

Jan 1, 1970
0
Does anyone know where I could buy a handful of piezoceramic vibration
units, of the type used in mobiles/cellphones? I can only find people
selling them by the thousand.

AFAIK the usey small electric motors with unbalanced weights on the shaft.
Also, does anyone know where I could find out more about these things,
in layman's language? I'm interested to know things like how much power
they use, whether they can be made to vibrate at different
intensities/frequencies

not by much, go too low and they don't spin up, too high and they don't last
too long.

someone cut one up and posted the pictures in
alt.binaries.schematics.electronics a few month back.

Bye.
Jasen
 
S

Sjouke Burry

Jan 1, 1970
0
Jasen said:
AFAIK the usey small electric motors with unbalanced weights on the shaft.




not by much, go too low and they don't spin up, too high and they don't last
too long.

someone cut one up and posted the pictures in
alt.binaries.schematics.electronics a few month back.

Bye.
Jasen
I have used them by the hundreds, they are just dc motors,
the smaller 4mm thick body , and others up to 6 or 9 mm.
Length 20-30mm.
Attatched to the shaft is an excentric weight, and they
run on a nominal voltage(depending on type) of 1 to 3 volt.
We used them in a vest as 3 dimensional display on the skin
and had an astronaut from Holland wear that in a few
experiments in the international spacestation.(google vest tno).
There is also a pancake model,(thin 2-3mm disk 10-12mm diameter)
either as a stepper motor, or a dc motor. They left onethird
of the rotor inside open,so no other excentric weight is
needed.
 
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