OldSynths

tb22 wrote:

>Rubber 'does" deterioate.(maybe just needs cleaning)
>Piezo does not.(can crack, though)

You don't say. I have a couple of drum things here that use piezo sensors.
Now they are just little brass disks - 90% of the piezo material has been
bashed off. And yes, these were mounted UNDER the pads.

Ken
_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Piezo material is usually a ceramic (or crystal), so while it doesnt
technically "deterioate", lots of vibrations over time could cause
the piezo to become chipped or detached from the brass they were
mounted on.
Rory McDonald
Oldsynths Moderator

--- In oldsynths@yahoogroups.com, sasami@h... wrote:
> tb22 wrote:
>
> >Rubber 'does" deterioate.(maybe just needs cleaning)
> >Piezo does not.(can crack, though)
>
> You don't say. I have a couple of drum things here that use piezo
sensors.
> Now they are just little brass disks - 90% of the piezo material
has been
> bashed off. And yes, these were mounted UNDER the pads.
>
> Ken
>
______________________________________________________________________
_
> Ken Stone sasami@h...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies
<http://www.blaze.net.au/~sasami/>

Piezos cracked?
Definitely a possibility expecially if under a drum pad.
Possibly the pad needs to be a little thicker, and
maybe have a backing(another rubber pad) behind it.
i see so many piezos with the wire detached.
everyone tries to "solder" it back on..heh heh
you know, even a little piece of piezo material will
generate a voltage. BTW, it's crystal not ceramic.
it's a property of crystals to generate a voltage when struck.
crystals can also be cut to resonate.
if U still have a piece of piezo on brass, take a wire, tin it
with solder then flatten it with a hammer. Superglue or
epoxy this flat conductor to the top of the piezo material.
U should be able to tap it with your finger and see a spike
on a scope. the brass is the gnd for your probe.

do like Mic Fleetwood did.
put a bunch of sensors in a shirt and play MIDI drums on your chest.

afn
tb

--- In oldsynths@yahoogroups.com, "ascii_me" <rmcdonald@w...> wrote:
> Piezo material is usually a ceramic (or crystal), so while it
doesnt
> technically "deterioate", lots of vibrations over time could cause
> the piezo to become chipped or detached from the brass they were
> mounted on.
> Rory McDonald
> Oldsynths Moderator
>
> --- In oldsynths@yahoogroups.com, sasami@h... wrote:
> > tb22 wrote:
> >
> > >Rubber 'does" deterioate.(maybe just needs cleaning)
> > >Piezo does not.(can crack, though)
> >
> > You don't say. I have a couple of drum things here that use piezo
> sensors.
> > Now they are just little brass disks - 90% of the piezo material
> has been
> > bashed off. And yes, these were mounted UNDER the pads.
> >
> > Ken
> >
>
______________________________________________________________________
> _
> > Ken Stone sasami@h...
> > Modular Synth PCBs for sale
<http://www.blaze.net.au/~sasami/synth/>
> > Australian Miniature Horses & Ponies
> <http://www.blaze.net.au/~sasami/>

--- In oldsynths@yahoogroups.com, "toneboy22" <tbarros@c...> wrote:

>
> do like Mic Fleetwood did.
> put a bunch of sensors in a shirt and play MIDI drums on your chest.
>
> afn
> tb
>

I saw Laurie Anderson do a similar thing in concert around '86-'87.
Pretty cool performance piece.

--Dean