The coil for the other end is actually a single large
loop that is wrapped around the candle the same way you would if you were
wrapping a rubber band around it. I then coated all the exposed wire and
solder with Liquid Electrical Tape for insulation (not shown).
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The end result. The coil can be slid back and forth
along the candle to change the distance between it and the needle tips
embedded inside the candle.
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