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From: fmgst@unix.cis.pitt.edu (Filip M Gieszczykiewicz)
Newsgroups: sci.electronics
Subject: Electonic scales question...
Message-ID: <25815@unix.cis.pitt.edu>
Date: 12 Jul 90 03:11:04 GMT
Reply-To: fmgst@unix.cis.pitt.edu (Filip Gieszczykiewicz)
Organization: The Last Jedi
Lines: 37


	Greetings. I recently got an elecronic digital bathroom scale.
	Being the curious type, I would like to know how it works.

	When I took the cover off, and stepped on it, I could hear
	a "click" (from an on-off switch), and then a high pitched
	"whine" (from an oscilator of some type, I presume)

	Now the questions:

	1) It does not use a load cell. It, reather, has a series
	of coils with a movable "plunger" that moves depending
	on the weight of something. (I presume it's cheaper)

	How does it work?

	2) I read in Consumer Digest of a advertising scheme that
	some companies used in similar scales. Seems some
	claimed that THEIR scales could be used on carpets. But
	in the fine-print stated otherwise, WHY? Mine seems to
	work on a carpet but the directions specify a hard, level
	surface, why?

	3) There is an adjustment pot for the end-user (on the
	fron panel) and another one on the pc board that's not 
	accessible so easily, what is it for?

	Might as well post to the net, I'm sure others want
	to know...

	Take care and have fun (in that order :-)

-- 
_______________________________________________________________________________
"The Force will be with you, always." It _is_ with me and has been for 10 years
Filip Gieszczykiewicz    "A man without a dream is like a fish without water."
FMGST@PITTVMS  or  fmgst@unix.cis.pitt.edu "My ideas. ALL MINE!!"