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1:The wire i used is extracted from a heater spring available at any electronic shope.
2: one side of the wire should be tighten to the screw at one side and another side of the wire should be tighten to a ballpoint spring. The ballpoint spring should be stretched and then attached to another screw as you can see in the video.
3: we use the spring because when the wire is heated, it expands,
4: 12v computer power supply is best for this machine.
5: important thing is. Use 12v plus minus wire at both ends of the wire...not screws..
I hope this would help. Thumbs Up
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