Half a croissant, on a plate, with a sign in front of it saying '50c'
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Remote signalling rodent trap

A better mousetrap ..
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A standard mousetrap (dead or alive) with a low power radio transmitter attached.

The transmitter "pings" once a minute, and could even relay useful information; temperature is the obvious parameter.

When the trap is sprung, the signal stops. The receiver generates a visual and (optional) audible signal.

The system is "positive-fail" as it will alert on a flat battery too. This is in case the trap is set in an unfrequented area where it might catch a mouse but fail to signal due to a flat battery.

8th of 7, May 11 2010

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