Keep Unwanted Visitors Away With a Motion Activated Sprinkler

Picture of Keep Unwanted Visitors Away With a Motion Activated Sprinkler

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.

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Step 1: Watch the Video

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

Step 2: Materials

Picture of Materials

Here are the materials that you will need in order to build this project.

Motion Activated AC Outlet:

Extension Cord (preferably with a three prongs on each end)

AC Infrared Motion Sensor

4 Twist on Insulator Caps

Insulated Project Enclosure

Sprinkler Unit:

Electric Sprinkler Valve with 3/4" Connectors

3/4" Male Garden Hose to 3/4" Male Pipe Adapter

3/4" Female Garden Hose to 3/4" Male Pipe Adapter

2 Garden Hoses

Above Ground Sprinkler

AC Power Adapter

Heat Shrink Tubing

Outdoor Extension Cord (optional)

EcoExpatMike9 months ago

Brilliant! I wish I had thought of this first. I'd buy one...

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.
epicalien8 months ago
Those are the same wire strippers I have!
MagicWood8 months ago

Are these motion sensors not also set to only activate at night?

DIY Hacks and How Tos (author)  MagicWood8 months ago
You can get around that by applying a small piece of tape over the light sensor.
MurphTheSmurf8 months ago
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.

So in total about $20.
Fliggerty8 months ago

This is hilarious! I just happen to have a spare valve laying around.... hee hee hee hee

craftclarity8 months ago

This would be a great project to keep the dogs from roving into certain areas in the backyard....MUHAHAHA