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XC3754 Soldering Guide
We do this as a stress relief for the resistor and is good practice to get in to. Bending it
before placing it into the PCB means that the joint will not be under stress once it is
soldered in. Having stress on the joint can break the joint in a way which is impossible to
see by the naked eye, called a
hairline fracture,
and can be a huge source of trouble to
track down when the circuit is not working correctly. It will also look neater in the project,
which is what we want when making a Christmas tree display.
Bend both legs of both resistors to 90° and place into R3 and R4 on the PCB board, as
shown.
Similar to the LEDs: bend the legs so that they don’t move, then snip them down to size.
Heat from one side and apply solder from the other side, for each joint on the underside
of the PCB.
