The first thing you'll have to do is place every single one of the pushbuttons onto
the board. They should be placed vertically on the board.
Before soldering the pushbuttons, make sure they are perpendicular (vertical) to
the board.This is very important as you'll have trouble putting the protective
casing on the device if the buttons are tilted.
After placing the components in the right place (pins through the tiny holes), put
the main board on the surface in front of you and pick up the soldering iron.
Solder all five pushbuttons, and make sure they are vertical to the board.
Also, now is a good time to check if there is any solder bridging.
After you finish soldering those five pushbuttons, this is what the back of the PCB
should look like.
And the front:
Part four - encoders
The next thing we'll solder is two encoders.
Those are similar to pushbuttons, but they are round and a bit bigger.
Here are the components that you'll need for this step. Got everything? Cool, let's
start!
Start with inserting the first encoder. As you can see in the photo, each rotary
encoder goes where the white square is shown on the board - it's hard to miss it.
Also, keep in mind that all pins must be inserted into the holes to solder the
encoder to the board later. In case any of the pins bend when inserting, simply
straighten them out with your fingers and try again.
There are seven pins on each encoder arranged so that there is only one way to
insert it. After inserting the first rotary encoder, repeat this step six more times.
Make sure encoders are vertical to the board before soldering.
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