Hi It's time to ask for help...been scratching head for too long. I need to build an sprinkler alarm for two scenarios 1. No flow in 12hours ( ie sprinkler didn't water) 2. Excessive flow ( broken pipe...flow for more than 40mins). I have a reed that will sense the Hall effect , it pulses every 250mls.
I have searched and most program's are for making water meters ( counting flow). This alarm is even simpler, it's just alarms if no flow in 12 hours or water flow for more than 40 mins. Any help much appreciated.