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Step 21st step
To straighten the copper wire, just clamp it in between two large pieces of wood, then rotate the wire until it's decently straight.
Then, with the wire in the clamp, use the propane torch to heat up the wire, then put a band of solder about two inches from the bottom of the wire. (I only took a picture the second time I did it, so the heat shield is already there)
Once you do this, bend one of your base colored LEDs' cathode about 3mm from the end and tin it. Now, you should be able to hold the LED so that the bent stub lines up with the wire, and quickly melt both the solder on the lead and some of the solder on the wire. Note: you will not be able to melt all the solder on the wire, because the copper wire draws the heat away from it.
Then, with the wire in the clamp, use the propane torch to heat up the wire, then put a band of solder about two inches from the bottom of the wire. (I only took a picture the second time I did it, so the heat shield is already there)
Once you do this, bend one of your base colored LEDs' cathode about 3mm from the end and tin it. Now, you should be able to hold the LED so that the bent stub lines up with the wire, and quickly melt both the solder on the lead and some of the solder on the wire. Note: you will not be able to melt all the solder on the wire, because the copper wire draws the heat away from it.
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