I need a force sensor - Electronic Circuits Projects Diagrams Free

fraughton · 2nd February 2003, 10:33 PM

I am designing a digital muscle strength tester for physiotherapy use. This is a school project and my goal is to design something that is quite cheap to build. The only type of force sensor that I can find datasheets on are load cells, but they cost way too much.
I need a sensor that can measure 250 to 300lbs. I figure that the sensors used in digital weight scales would do the trick, but I cant find any info on the actual sensors inside them. If anyone knows where I can find some information, I would greatly appreciate the help.
Thanks.

Pilot · 3rd February 2003, 08:38 PM

No info on the sensors but.....

Why not adapt from a set of digital bathroom scales?

Have a look at..........

http://www.inference.phy.cam.ac.uk/i...oom_scales.pdf

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2nd February 2003, 10:33 PM	(permalink)
fraughton	I need a force sensor I am designing a digital muscle strength tester for physiotherapy use. This is a school project and my goal is to design something that is quite cheap to build. The only type of force sensor that I can find datasheets on are load cells, but they cost way too much. I need a sensor that can measure 250 to 300lbs. I figure that the sensors used in digital weight scales would do the trick, but I cant find any info on the actual sensors inside them. If anyone knows where I can find some information, I would greatly appreciate the help. Thanks.

3rd February 2003, 08:38 PM	(permalink)
Pilot	No info on the sensors but..... Why not adapt from a set of digital bathroom scales? Have a look at.......... http://www.inference.phy.cam.ac.uk/i...oom_scales.pdf