pressure/force transducer

Hi, I am a hobbyist looking to design a project which incorporates a pressure sensitive pad. The pad would give an output proportional to the weight bearing down on it. Can anyone suggest the type of sensor/transducer which may be used. Thanks, Ian Scotland

Reply to
ianw
Loading thread data ...

--
http://www.google.com/search?hl=en&rls=GFRC,GFRC:2006-50,GFRC:en&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=pressure+sensitive++resistor&spell=1
Reply to
John Fields

Electronic weigh scales use the pzieo electric effect and are cheap and common. Ken

Reply to
Ken S. Tucker

Load cell + signal conditioner, but probably too much scratch for a hobbyist.

Best regards, Spehro Pefhany

--
"it\'s the network..."                          "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
 Click to see the full signature
Reply to
Spehro Pefhany

Google "strain gauge".

--
Paul Hovnanian	paul@hovnanian.com
-----------------------------------------------------------------------
 Click to see the full signature
Reply to
Paul Hovnanian P.E.

Are they really pzieo? I thought they only worked on changes in size rather than absolute position.

When I was a kid, by dad gave me a block of stuff and a neon bulb. With a pair of pliers (and cardboard insulators) you could make the light blink.

I remember squeezing like mad (turning blue etc) and nothing happened. Then somebody told me or I figured out that it needed a change rather than steady state force. Yup, now it was easy.

--
These are my opinions, not necessarily my employer\'s.  I hate spam.
Reply to
Hal Murray

The piezoresistive effect (change in resistance with deformation) is affected by absolute deformation. The piezoelectric effect requires changing deformation.

It's the former which is used in strain gauges and load cells.

Reply to
Nobody

Thanks for the heads up and the spelling correction. This has an interesting cartoon,

formatting link
Ken

Reply to
Ken S. Tucker

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.