ChrisAtUpw@....... wrote:
> In a message dated 01/11/2007, johnjan@........ writes:
> 
>     There are two issues involved.  One is the absolute deflection due to
>     adding a weight and the other is the electronic response, once some
>     motion sensor has been applied.
> I find it easier to cut a measured length of Copper wire and bend it 
> so that it gives a three point contact - a small U loop and a larger U 
> loop at right angles to it. You can look up the weight either in wire 
> tables or by the diameter for that gauge and the density of Copper.

Pharmacists usually have a good accurate scale and will weigh things for me if 
I provide them with some conversation which goes beyond their daily fare of 
pills and potions.
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