Proper soldering requires practice. Soldering a light emitting diode (LED) or any other device to a printed circuit board (PCB) takes skill and patience, especially on modern boards with tiny connections. You should not try it on your first attempt at soldering. Practice on something else first. Mistakes can be costly. But once you feel up to the task, follow the steps carefully. Make sure you have a low power soldering iron that will not burn adjacent components, and you use solder with a small diameter not to flood the PC board with excess solder which may cause a "bridge" (short circuit).
Instructions
1
Clean the circuit traces on the PC board with solvent and a clean rag.
2
Insert the two leads on the LED into the designated holes on the PC board. Observe proper polarity; the anode being positive or plus and the cathode, negative or minus.
3.Bend the leads away from each other at a 45-degree angle from the plane of the circuit board. This holds the LED in place while your solder it.
4
Plug the soldering iron in and let it heat up.
5
Clean the soldering iron tip by melting solder onto it. Quickly wipe it clean on the damp sponge. It should be bright and shiny. If it is not, keep cleaning it until it is.
6
Touch the soldering iron to one of the leads of the LED where it touches the PC board trace. When it is hot, in a few seconds, touch the tip of the solder lightly to the joint but not to the soldering iron. The solder will melt quickly and "sweat" onto the joint. Quickly pull the iron and solder away. A good solder joint will look shiny.
7
Repeat step 6 for the other lead on the LED.
8
Snip the excess leads off with the wire cutters. Cut them flush with the PC board.
9
Clean the solder joints with a rag dampened with the solvent. Then dry it with a dry rag.
Tips & Warnings
Turn your equipment off and unplug it before starting. Working on energized equipment is dangerous to both you and the equipment.
Be careful that your soldering iron does not touch other components or solder joints on the PC board.
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