Motion detection sprinkler

So my neighbours cat uses my garden - my vegetable patches to be exact - as a toilet. I know there are many many people out there just like me who are sick of it. I happen to like cats, used to have one myself, but i dont like them crapping in my garden.
I've tried everything. Nothing works.
But they dont like water and having soaked the cat at 4am with the hose a month ago i got a few weeks of bliss being left alone, until just last night when it decided to try again. I can't wait up for it all the time. So I want to make a motion detection sprinkler. Cheap as I can.
I could buy one ready made like the Contech ScareCrow but it's £50.
I figure it can't be that hard, I have several hozelock sprinklers in the garage that I dont use. If I could buy a cheap infrared motion detector and some kind of actuator? Maybe I could rig it up to the hose and sprinkler, but not sure exactly how to do this.
Hoping someone here can suggest how to proceed?

Triclaw3 years ago