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Step 3 Soldering Time

I'm afraid a complete tutorial on soldering isn't within the scope of this instructable either, but the torch is quite easy to solder. I put a blob of solder on the iron, and then whilst holding one end of the component down with my finger or some tweezers, I apply this blob to one end of the component. Then I solder the other end, and finally go back to the first end and solder it again. All components can be put either way around except for the LED - for this one the longer lead is the positive (check before you shorten it!), and should be at the bottom of the PCB in this image (next to the resistor). The negative end can also usually be told by looking for a flat mark on one side of the LED's plastic cover.