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It’s also a good idea to not have the resistors installed right against the board, for a couple of
reasons: 1) it's better for heat disposition, and 2) in some cases there are circuit traces running
under the resistors and we really don't want resistors touching them. So, as shown below (on a
board from a different kit), we use a narrow piece of cardboard cut to size as a 2–3 mm spacer:
this will still let you solder while ensuring that the resistor is not pressing against the board.
Also, be sure to solder on the underside of the board and check that you have nice little
“volcanoes” on each solder joint. And, when you go to clip a lead be sure to clip above the
volcano so that you don’t slice off this nice joint.
Populate the board with the resistors, installing them into the correct designation. Then
bend the legs
slightly
once they are in the board to secure them; this way they won't fall
out and you can check your work again prior to soldering. Once all the resistors are in and
you feel confident then you can start soldering from the underside of the board.
