Magic Touch

A very low cost proximity or movement sensor

The sensor works by detecting very small changes of capacitance (less than 0.01pF) of a sensing electrode. The trick, however is how this is all done with a supply current of 20uA and for a manufacturing cost around USD0.80! Patents applied for.

Applications:

• Toys and games to make them "magically" come to life as a child approaches or in a game of skill where actions have to be done without setting off the alarm
• Security systems to protect individual items
• Point of sale to activate a sales message when a shopper shows interest in an item on display

Key development tasks:

• Design for ultra low cost manufacture
• Real time MCU code
• Measurement technology

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