Please note, I have no affiliation with this project.

Another winter project...

This is an open source project, contrary to the many proprietary ones out there. Everything is available to the public. Other than that, the big difference is that they do not use a load cell (that is commonly used, which they claim are susceptible to creep that makes measurements inaccurate over time. Instead they use a mechanical principle which you may be familiar from a steelyard balance ( Not to worry, there is a motor that does the shifting of weight for you.

I have assembled the mechanical part already, and I think it is well engineered. I do wonder how everything will hold up over the seasons, though.