Hi
I'm a newbie trying to do a project on a diy weighing scale. Underneath a square glass plane, I connected 4 load cell at each corner then connected to my arduino mega 2560 analog input. However, the examples that I've found online all used an amplifier. I want to do it without an amplifier so how should it be done?
STEPS:
- take in 2 inputs per load cell (total 4 load cell = 8 inputs)
- The difference of the 2 inputs of each cell
- if A0>A1 = Differemce 1 OR if A1>A0 = Difference 2
- Sum up the 4 differences
- Total difference multiply by the resolution to get kg/bit
- Finally display the total weight
Questions:
- How to read the analog input?
- How do I do the zero calibration? (Because there is a glass panel on it)
- Do i need to do A/D conversion myself? How?
- What is the calculation for reading value of the difference in relation to kg?
- Is there any string commands to display the words like " Total weight:" with the final value?
fx1901 compression load cell (25lb)