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SureFlap Microchip Cat Flap. Among the three winners was five-year-old Isabel Saffron Booth from King’s Ely school, who suggested the sound recognition system could be used to tell ... Other technologies on show included Rubik’s cube-solving robots

Put a tag - a microchip with an antenna - on a can of Coke or a car axle, and suddenly a computer can "see" it.

His fascinating study of the tiny microchip at the heart of this powerful machine reveals the origin of the materials and the processes involved in its manufacture.

Putting their tech to the test were Light Blue Optics – makers of an interactive projector which turns any surface into a virtual touchscreen; Sureflap an automatic catflap which uses cat microchip

Energy and National Science Foundation – where semiconductor fabrication for microchips that was developed in the earliest stages of the nanotechnology lifecycle could essentially be used for semiconductor fabrication of solar PV

Also on display were the Light Blue Optics interactive projector which turns any surface into a touchscreen, and the widely-available SureFlap catflap which identifies cats from their microchip ID tags.