I want to build a physical pressure sensor that detects pressure and transmits this information to a recording device (watch?). Proposed application: If one wants to know how many times and length of time that someone sits on a chair, this device (attached to the backside of the person) would be able to give that information. Thank you for your expertise.
Goofy answer: It's called a flight data recorder..Or black box.. :) But seriously... I gotta question from the question ... Isn't there some sort of proximity detection method using field coils or antenna? Dodges pressure sensor idea..
Is the person at a computer?...could just interface and software it. D from BC
That's kinda like the opposite of a pedometer. See
On a sunny day (21 Jan 2007 12:51:51 -0800) it happened "rabbit" wrote in :
Chewing gum?
You really don't need a pressure "sensor". A pressure "switch" will suffice. Take a look at the the World Magnetics products (avail from Digikey). These have 2 connections, which form a closed circuit when the pressure exceeds a predetermined value. Some models have adjustable trip points. These switches require no electricity to operate.
Digikey #: 384-1019-ND, for example.
-mpm
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