Do the local animals think that your front lawn is their personal toilet? Do ninja assassins keep trying to sneak into your house? Keep these unwanted visitors away with a motion activated sprinkler system. As soon as they step into your lawn, a passive infrared motion sensor detects the intruder and turns on the sprinkler to chase them away.

Step 1: Watch the Video

Here is a video of the build that I made for Make Magazine.

i finally got around to picking up the supplies for this project. i can't wait to start! There may be several of these on the market, but they're expensive and I would rather know how to make my own so I can modify it and add to it to fit my yard and my use in the best way. Thanks for posting this!
<p>This is an awesome idea! We got alot of skunks in the area.. wonder if this would work to scare them off! Our dogs have gotten sprayed multiple times.</p><p>Also- You can get a CHEAP used AC adapter for this project at <a href="http://www.pluginreplacements.com" rel="nofollow">www.pluginreplacements.com</a></p>
<p>you can get a CHEAP used AC adapter for this project at www.pluginreplacements.com</p>
<p>Brilliant! I wish I had thought of this first. I'd buy one...</p>
There has been one on the market for years to scare away deer and other pests. Was/is marketed as the scarecrow. Only needs a 9v battery and a hose connected to it if I remember right.
Those are the same wire strippers I have!
<p>Are these motion sensors not also set to only activate at night?</p>
You can get around that by applying a small piece of tape over the light sensor.
How much did you spend on this?
I got the motion sensor at a used building material store for $5. The sprinkler valve was $12. The fittings were $2 each. The rest of the parts (hoses, sprinkler and power adapter, connectors) I already had lying around my house.<br><br>So in total about $20.
<p>This is hilarious! I just happen to have a spare valve laying around.... hee hee hee hee</p>
<p>This would be a great project to keep the dogs from roving into certain areas in the backyard....MUHAHAHA</p>

About This Instructable


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Bio: My name is Jason Poel Smith I am a Community Manager here at Instructables. In my free time, I am an Inventor, Maker, Hacker, Tinker ... More »
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