Electronic Weigh Scale

That's more like it.

something (a pan) to hold the item being weighed. Something that gets changed when you put things in the pan. This could be:

A beam bends A spring extends or compresses. A gas or liquid gets pressurised.... or many other ways.

Something to measure the size of the change:

A strain gauge (or more than one) Something that measures linear deflection Something that measures pressure.....

Some electronics to process the measurement:

Bridge amplifier LVDT (say) converter etc...

Something to turn the processed value into a useful form:

An ADC A processor tochenge the ADC units to real- world units.

Some way of viewing the results:

An LCD or LED display A serial link to a host computer etc. etc.

There. That should be enough to go on.

Oh, and you'll need some means of calibrating it. stabdardised weights from somewhere.

Paul Burke

Two words: force feedback.