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Cat Sprayer

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How to keep you feline from scratching your valuables.
This purpose of this device is to deter your cat. When the cat crosses the path of the light from the diode to the photo transistor, the pump is activated and sprays whatever is in its path with water .

I built this cat sprayer to keep my cat Mia from scratching at the carpet trying to get into the room waking us and destroying the carpet.

The video below shows Mia trying to enter the room. The first time she was sprayed she jumped about 3 feet in the air. Now she is quite used to the sprayer and seems to test first if it is on, but she doesn't attempt to scratch anymore.

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The Photo below shows the internal pump. I used a windshield washer pump. This draws about 3 amps at 12 volts, so an appropriate power supply was necessary.

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Schmatic above.

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