Hi ,
I am busy on a similar project. with :
-2 strain gauges from a bathroom scale ( there are 4 in each lowcost bathroom scale) mounted in weadstone bridge on a ad620 precision amp ( cheaper than the texas ina125 )
-4 ds1820 temp sensor
-HD44780 LCD
-DS1302 RTC
-sd slot for data storage ( tested appart and working but not implemented yet in this specific project )
the objective is to read temp + weight each 24 hours and to store or send it
accuracy is 100gr , but one of my biggest problem was until now to keep the weight readings stable
Maybe we could share our respective experience ?