Can you get accurate, relative or repeatable readings, from a strain gage with a inexpensive digital volt meter?
I would like to build an electronic scale using a strain gage, but I could care less about the units on the display. I just want to be able to accurately measure say, 400 pounds of product, again and again for a batching operation.
Could I load the scale with a 400 pound weight, observe the reading on the volt meter, remove the 400 pound weight, and load the scale with product until the same meter reading is observed?
Would battery life cause the need for frequent recalibration? If so, would a low buck 9v power supply eliminate this?