Arduino isn’t limited to taking input from sensors: you can even connect a full-size PS/2 keyboard just as if it were a “real” computer and type away! Connecting a keyboard to an Arduino may sound a bit odd (after all, it’s just a little microcontroller), but keep in mind that an Arduino actually has more processing power and memory than a complete desktop machine of not-so-many years ago. Adding some peripherals that you would normally associate with a full-size computer opens up some interesting possibilities.
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