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This science project wil show you how to make a returning CD-ROM wheel.This experiment is usually done with a tin can, but here you can see what is ...
Get 2 used CD-ROM's. These will be the 2 sides of the wheel.
Draw the following template with a CD-ROM. The 4 rounded holes will be needed to assemble the wheel. The 2 holes marked with a square are the elastic ...
Cut the template and stack it on top of the 2 CD-ROMs
Use a dremel to drill the 6 holes
You will get the following: In yellow: 2 holes for the elastic bands In red: 4 holes for the mounting screws
Get a dowel and masking tape. Cut 4 pieces of dowel, each one the width of a masking tape as shown.
Get a heavy bolt and a piece of string. Attach the bolt with the string. This will be the internal mechanism that will make the CD-ROM wheel return.
Assemble the dowels to the 2 CD-ROMs with 4 screws. Insert 2 elastic bands in the elastic holes and hold them with nails as shown. The elastics bands ...
Attach the bolt at the intersection of the elastic bands.Gently roll the CD-ROM wheel away from you.It will roll forward, stop and return back!You can see the results ...
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