Mouse around, the pattern of red light reflected off the desk changesįrom one moment to the next and the circuits inside the mouse use this LED light and turns it back into an electrical signal. Next to it, there's a photoelectric cell-a component that detects the reflected The light is produced by a light-emitting diode ( LED) right Your desk and another one that detects the light as it bounces back upĪgain. Two optical components underneath: one that shines red light down onto If you lift up an optical mouse, you'll see there are Rubber ball), you're already using most of the technology that aĭigital pen uses. Works by shining light onto your desk instead of using a heavy, This one is no longer available, but there are plenty of similar ones on the market.Ĭhances are you already own something quite like a digital pen. Times fatter than a fountain pen, a little bit longer, but not all that Sounds amazing doesn't it, so how exactly does it all work? Them and transmit them automatically to your computer using wireless Digital pens look like fatterĮlectronic circuits, optical devices, andīluetooth® gizmos, they can record the things you write as you Read back your notes and type in the information (that is, write it outīetter solution: the digital pen. When you get home? Until recently, your only option would have been to Notes to yourself as you sit on the train, but what if you need to put Pens and paper are not very compatible with the digital technology that
Information that dates back thousands of years? The only trouble is, Invention than the pen-an incredibly convenient way of recording
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