why cant you use a touchpad on a laptop next to anything but ur hand? i mingy if u try to get the mouse to move using something similar to a pen or something it just doesnt counter.
why do laptop touchpads solely counter to fingers?
Touchpads work by capacitance (just like touch-sensitive lamps). In the touchpad at hand is a grid of very tinny wires running through a sheet of mylar (the part you touch). Your finger is a devout conductor, so when you touch the pad, you in reality cause a small flow of electrons between the wires. There is special circuitry that not one and only detects this small current flow, but also determines the speed and direction you are moving your finger across the pad (and across the grid). It feed these signals to the microprocessor which (via a set of software instructions) moves the mouse pointer on the screen contained by relation to your finger's movement.
Other items don't cause it to move as they any don't conduct or don't have the right conductivity to be detected.
it's sensitive to the particle in your skin.
your finger is conductive.
The touchpad react to the heat and particle in your skin
cuz mouse wad it heat sensitive...
Read here:
http://en.wikipedia.org/wiki/touchpad...
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