This is my first time posting to the spark forum. Have read a lot of other posts and really appreciated the knowledge out there.
I’m building an automated systems project for a small woodland orchard and need to control at least 8 water lines. the Relay shield that spark sells only allows for four. Any ideas out there how I can access at least 8? And if at all possible I would like to have a few lines available for input like temperature and water flow. It seems a bit sad to lock up all 16 lines for only 4 usable ones.