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Step 4Make The Flat Heart Shape
Make the Heart shape either by using a D-Cell battery, or a piece of pipe, as a form. Put it in the vice and wrap the wire over it. The idea is to wrap the wire most of the way around the form to give a rounded look.
For the flat heart, the two straight ends become joined by soldering, so they must meet together. Also, the total height of the heart must be correct (about 8.5 cm works well) for it to sit on the battery, touch the coins or magnet commutator, and not touch the speaker or table. The distance from battery + terminal to the magnet contact point should be about 6.0 cm.
The second Heart shape requires a complex bend into two flat-bottomed legs that encircle, but don't touch, the magnet. Have a close look at the pictures and use fingers (and a pliers if necessary) to make the bends.
It is tough work requiring strong fingers if 10 gage wire is used!
The total height of the second Heart should be about the same as the first Heart ( 8.5 cm). It uses the same 6 cm distance from + terminal of the battery to the magnet contact point.
For the flat heart, the two straight ends become joined by soldering, so they must meet together. Also, the total height of the heart must be correct (about 8.5 cm works well) for it to sit on the battery, touch the coins or magnet commutator, and not touch the speaker or table. The distance from battery + terminal to the magnet contact point should be about 6.0 cm.
The second Heart shape requires a complex bend into two flat-bottomed legs that encircle, but don't touch, the magnet. Have a close look at the pictures and use fingers (and a pliers if necessary) to make the bends.
It is tough work requiring strong fingers if 10 gage wire is used!
The total height of the second Heart should be about the same as the first Heart ( 8.5 cm). It uses the same 6 cm distance from + terminal of the battery to the magnet contact point.
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