PIC Scale -
John Payson email (remove spam text)
> I have seen electronic scales use current to electromagnetically counter
> gravity, with the equilbrium point being determined by light that was
> obstructed by a blade on the moving part. The current servos until the
> light is dimmed to about half. Over narrow ranges the
> response was quite linear. But I would think that force transducers
> would be a more rugged approach.
Interesting notion. How about a mechanical balance with a weight that slides
along a lever under software control via either stepper or motor+quad encoder?
Should be simple enough to program, and the mechanics shouldn't be too bad
In reply to: <01BCB178.91E88D60@DENISE> from "John Shreffler" at Aug 25, 97 05:01:44 pm
See also: www.piclist.com/techref/microchip/devices.htm?key=pic
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