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This is a question The best thing I've built

Wehttamman asks: My dad and I once built a go-kart from chipboard, pram wheels and an engine from a lawn mower. It didn't work... so tell us about your favourite things you've made, and whether they were a triumph or complete failure.

(, Thu 11 Oct 2012, 12:00)
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Cat-activated cat squirter
After suffering with a cat who insists on climbing on every kitchen surface and realising that a squirt of water was the best defense against paw prints everywhere, I decided to build an electronic squirter.

The device consists of an infra-red beam and sensor which, when interrupted by a cat*, activates a pump that takes water from a box and fires it in the direction of the cat*. For added scariness I've also wired in a device that creates a hissing sound when triggered**.

*or forgetful human
**I don't personally find it particularly scary.
(, Fri 12 Oct 2012, 12:22, 3 replies)
This is great!
(, Fri 12 Oct 2012, 14:15, closed)
Pictures, please!

(, Fri 12 Oct 2012, 14:55, closed)
I need either an Instructables-style how-to or for you to make me one.

No, seriously. At least about the first part. Desperate for something to stop our youngest kitten exploring!
(, Fri 12 Oct 2012, 20:40, closed)

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