On Wed, 21 Sep 2011 06:41:46 -0700 (PDT), mkr5000
wrote:

If your in a no freeze climate you can attach a 4 dollar sprinkle and an electric valve to a motion detector -- that's what I did this summer.

They come anywhere near and that sprinkler pulses madly, and like anyone else, nobody likes to get wet.

Only thing that's worked for me.

Rainbird makes a $15 valve but it's dc, so here's what you need --

motion detector light and a bulb 120 screw in socket
12v dc power supply valve sprinkler.

No need to make anything:
http://www.amazon.com/Havahart-5265-.../dp/B000BO71NY