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Mousetrap coffee table robot
London - mentioned
A mechanised iris is built into the top of a coffee table. This is attached to a infra red motion sensor. Crumbs and food debris left on the table attract mice who gain access to the table top via a hole built into one over size leg. Their motion activates the iris and the mouse falls into the microbial fuel cell housed under the table. This generates the energy to power the iris motor and sensor.