A few years back, researchers at Microsoft created the XWPen. The XWpen was an interesting device which had a built in handwriting recording circuit which could fit in the space that and ink cartridge would take. The circuit has a tilt sensor which tracks movement of the pen. By transmitting this information to a computer near by it can then put what you write or scribble down on to the screen. It uses an RS232 port on the PC to track this via a radio transmitter at 1200 baud rate.
No doubt this technology could be superceded now, but for back in the days it was a nice step forwards and quite a cool idea for it’s time.
Via: Microsoft
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