Page 47 - Making things move_ DIY mechanisms for inventors, hobbyists, and artists

28 Making Things Move

Shopping List:

• 1 sheet 1/4-in thick clear acrylic, approximately 15 × 31 in (Ponoko.com stock)
• 1/4-in diameter, 36-in long wooden dowel
• Multitool with knife and file

• Mousetrap
• Paint-stirring stick
• Fishing line or other thin string
• Rubber bands

• Duct tape roll
• Small bowl
• Spoon or fork

• Egg(s)

Recipe:

1. See www.makingthingsmove.com for the link to download the templates
from Thingiverse. This template was designed to be laser cut from the 1/4-in
clear acrylic that Ponoko.com stocks and configured to fit on its P3 template.
Register for Ponoko.com, and order the design cut out of your chosen
material. You can also use the template to cut pieces out of cardboard or
foam.

2. Use the knife on the multitool to score the wooden dowel into eleven 2 1/2-in
long sections. Snap off the pieces at the score marks and file the edge. Set
aside the remaining few inches.

3. Place all 2 1/2-in dowels in the back side template (refer ahead to Figure 1-29).

4. Loop rubber bands around the dowel just below the top-left dowel, as shown
in Figure 1-28.

5. Tape the spoon or fork to the bottom-center dowel so that it can pivot when
the duct tape roll falls and hits it.