sprinkler systems

[BigDaDDY]

Does anyone know of a sprinkler system that has some logic built into it? I was thinking of a control system that would make use of some transducers that sense moisture levels and ensure that moisture levels stay within a certain range. The moisture level combined with the time of day would determine whether the sprinkler system is activated. Is there already a product out there to do this, or should I start designing my circuit now?

Thanks,

Matt

[Steveo]

The only one that I'm aware of is the rain sensor, and they usually don't work very well.

[Bugman]

Start designing your circuit right now. Make sure you measure moisture levels in the soil, and at the appropriate depth; no other measure is a good indicator.

chris