Page 145 - Making things move_ DIY mechanisms for inventors, hobbyists, and artists

Chapter 6 Options for Creating and Controlling Motion 125

• Two alligator clips (like RadioShack 270-1540)

• 9V battery clip (like RadioShack 270-324)
• 9V battery

Recipe:

1. Measure and cut 10 ft of the green wire.

2. Wrap the green wire tightly around the magnet a bunch of times to form a
tight coil. Leave about 1.5 in unwrapped on each end.

3. Remove the coil from around the magnet. Loop the ends inside the coil, then
back out, to secure it from unraveling. Make sure the finished coil looks
symmetrical.

4. Using a knife, remove the coating from the wire on one side of each end at a
45° angle (see Figure 6-1). Scrape each side of the wire such that when the
coil hangs at 45º, the scraped part faces down or up. You should see the shiny
copper now.

FIGURE 6-1 Wire coiled with end scraped