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Pascal Pulley

by littleBits and Disney

Published on January 12, 2017

Use your Gizmos & Gadgets Kit, 2nd Edition to build this pulley system to lower objects from a ledge or tower, just like the way Rapunzel uses her hair in Disney Tangled!

Duration: 1 Hour

How To Make It


Build your circuit.
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Press your circuit onto the mounting board.
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Press your DC motor onto the mounting board.
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Break two full wooden pencils in half and shave all four pieces down so that they each become two inches long. Break off any sharp tips if necessary.
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Slide a standard pink eraser head onto each of your four pencil pieces.
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Slide your four pencil pieces through the four big holes on your wheel so that the eraser heads fit tightly.
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Slide your four pencil pieces through the four big holes on your second wheel. Make sure that the extruded D shape in the middle of the wheel is face-up.
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Use scissors to trim off half an inch of four additional pink eraser heads.
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Slide your four trimmed eraser heads onto the ends of the four pencils and pull the second wheel up so that the wheel fits tightly.
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Attach your connected wheels to your DC motor.
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Use Glue Dots to attach your mounting board to a table so that the wheels hang off the edge.
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Cut a long piece of string.
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Tie one end of your string to any of the pencils.
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Wrap your string around the pencils clockwise.
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Download the image of Disney Rapunzel (Rapunzel-Pulley.jpg) at the top of this page in the "Additional Files" section.
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Print out the image of Rapunzel full size on an 8.5x11" piece of paper.
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Use glue or spray adhesive to attach your image to the top of your box.
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Cut a small hole in the front of your box and a large hole in the back of your box as shown.
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Feed your string in through the back of the box and out through the front.
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Put a couple filled water bottles, several tuna fish cans, or something similar inside your box to weigh it down.
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Place your box on the edge of a table as shown.
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Tie a very light object that you want to lower to the loose end of your string.
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Turn power on and set your DC motor to CW (Clockwise).
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Select the "BUTTON" option from the "BIT CONTROLS" menu in the littleBits Invent app to control your invention.
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