You will build a sordering machine with some easy isntruments
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Open the mecanical pencil and take these two parts
Cut the straw, a little bigger than the pen stick, you will use the excess
Conect everything and make sure that isnt any holes, you can cover it with some tape
Roll the solder wire on the pen's stick
Take the wire and put it in the empty oldpen
Use the paper clip like this, than put some take to hold it
You will sold like this
Make sure the conection of the pen-straw-stick on the lighter, you can turn on with fire