Hi, not sure if you are still around since this post is almost 3 years old but ill aska nyway, Im trying to build this for my calves as well. Im testing it and trying to "calibrate" it, however, Im not getting stable results for example, after I zero the board and wait some 10 to 20 minutes the values fluctuate a bit as usual but instead of getting -1, -2, 3,, 0,1 etc (around zero) I start to get 9, 10, 8, 10, 11, 7, ... or shifting to around -4: -3,-5,2, -1, 0, etc,... this makes calibration very difficult because Im not sure if the zero has shifted up and down as Im weighing things...
My question is, do you think the power suppply voltage has anything to do with this fluctuation? Im using two 9 volt batteries in series, 180 ohm resistors (changed the formula accordingly) and I got the dwyer 626 with less error than the 628, any suggestions or tips are welcome!
