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Step 15Required Assembly: Crystal
The next component to place is the 20 MHz crystal. Like the capacitors we just placed, there is no easy way to test that we soldered these properly, so take your time and do it right.
Like the resistors and ceramic capactors, there is no orientation. Just put the crystal in the holes.
The crystals come in a metal casing with two pins to solder. I am of the personal opinion that bending these legs is bad; knowing how much the PIC relies on the crystal timing to operate, you should try your best to solder the crystal cleanly and securely. The crystal legs should go through the holes without any resistance or bending needed. Doing your best to hold it in place, solder only one leg, and then check the crystal to make sure it is flat against the board. If it isn't flat, melt the solder, adjust, and let the solder cool. Check again until it is flat. Once it is properly placed, solder the other leg and recheck. If the crystal is flat and the soldering is good, trim the excess wire.
Like the resistors and ceramic capactors, there is no orientation. Just put the crystal in the holes.
The crystals come in a metal casing with two pins to solder. I am of the personal opinion that bending these legs is bad; knowing how much the PIC relies on the crystal timing to operate, you should try your best to solder the crystal cleanly and securely. The crystal legs should go through the holes without any resistance or bending needed. Doing your best to hold it in place, solder only one leg, and then check the crystal to make sure it is flat against the board. If it isn't flat, melt the solder, adjust, and let the solder cool. Check again until it is flat. Once it is properly placed, solder the other leg and recheck. If the crystal is flat and the soldering is good, trim the excess wire.
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