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XC3754 Soldering Guide
How to solder correctly
One of the main important notes about soldering is the need for the components to be
the correct temperature for the solder to bind to them, in this case it is both the PCB
pads and the LED legs.
A good way to do this is to use the iron from one direction and apply the solder from the
other direction, making sure that the solder touches the components and melts through
the heat of the components, rather than touching the iron.
Here, you can see we have the PCB mounted in our “Third Hand” holder, TH1982. We
apply the soldering iron to one side of the LED leg, touching both the leg and the pad
underneath.
Then we apply solder from the top, so that the heat of the leg and pad is what melts the
solder. Once the solder flows, it will touch the iron to help keep everything hot and flow
well into the joint.
You only want to apply the heat to the components for a few seconds, it’s best to try to
aim for under 2 seconds. You can re-touch the joint if needed, but do not hold the heat
on the components too long as it can damage whatever you are trying to solder,
including the PCB itself.
It can take a bit of practise to get the timing right, but that’s what this kit is all about.
