We haven been asked how the Load Cell Bricklet and load cells work in general several times now. To demonstrate the functionality we made a small scale project with a 1kg load cell. It turned out so well, that we put it in the shop as a Scale Kit ;-).
The Scale Kit is build from MakerBeam, a 1kg Load Cell and laser cut plastic parts. It is very easy to put together and it demonstrates the functionality of a load cell.
A precision of ±1g is the complete 0-1kg range is possible with the kit.