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Pigeon Scarecrow

I have an area on my roof where a large flock of pigeons like to roost.  Their nesting materials and droppings really make a mess. Often there is enough junk from them that it clogs my roof gutters.  Perhaps one way to scare them away is with a device mounted on the roof near their favorite roosting spot.  The device could contain an infrared motion detector.
When it detected their motion, a spring loaded cover would suddenly pop up, like a jack-in-the-box. The thing could be equipped with a small solar panel, which could charge up either a super capacitor or a long life battery.  After each pop up activation, a motor would pull the cover down into the body of the box.  A solenoid brake would lock the system in place, making it ready for another cycle.  I think the device could be camouflaged to look like a standard roof vent.

Perhaps instead of using an infrared motion detector to activate the device, it could just go through a cycle every 10 minutes or so.  It could also contain daylight sensor so at night, the number of activations would be reduced to perhaps once every 30 or 60 minutes.  This should extend battery life.

 

Circuit Scare off Pigeons

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