The following pages cover the step by step instructions on how to solder the Rev F PCB.
(NOTE: The PCBs in the example pictures and videos are a prototype version of the PCB and were mistakenly labeled Rev Ee)
Click the images to zoom in. All the construction example videos from these pages are also available on YouTube. Some good intro to soldering videos can be found at curiousinventor.com and also at sparkfun on YouTube (some of the videos may be upside down on this website).
7 - Q1 12.288Mhz Xtal
The crystal is used to provide the clock for the VS1001 MP3 decoder. The resonant frequency of the crystal used here is 12.288MHz which is internally doubled to provide the actual clock used to decode the MP3 stream. Quartz crystals resonate at a given frequency and are very reliable and stable across temperature and part variations.