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So far, all the projects in this book have focused on mobile robots that use treads, wheels, or legs to get around. Now, in the final chapter, you’ll learn to build and program a stationary robot: the Printer (Figure 16-1). The Printer is a printing machine that uses a pen to write or draw on a sheet of paper. By drawing different combinations of lines, the Printer can produce basic shapes and letters.

From

Cover of The Unofficial LEGO MINDSTORMS NXT 2.0 Inventor's Guide, 2nd Edition

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I really want a printer like this