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Technology / How Does A Mouse Panel Work ?
« on: 20/06/2008 18:21:35 »The touchpads use a buried grid of wires, and work by capacitance sensing.Mousepads don't have buried grids of wired... neither would most modern types of touch/mouse pads.
When I can borrow my friends camera, i'll post a picture or two of the back of my mousepad. No grid of wires there.
The method your thinking about might be this one...:
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The capacitive shunt method, described in an application note by Analog Devices[5], senses the change in capacitance between a transmitter and receiver that are on opposite sides of the sensor. The transmitter creates an electric field which oscillates at 200-300 kHz. If a ground point, such as the finger, is placed between the transmitter and receiver, some of the field lines are shunted away, decreasing the apparent capacitance.
No grid of wires there.