It’s the weekend, it’s starting to warm up- and that means lawn care season is just about here. CocoonTech has a great thread about making your own sprinkler system. There are enough electronics, planning, schematics and parts to make this a fun project. If I had a yard, I think I’d hook the sprinklers in to a weather reporting system along with a local “do not water” notification system so they won’t turn on if there’s a water shortage. Link.