For notes, errata and updated firmware for this project please visit:
      http://geoffg.net/GPS_Synchronised_Clock.html

Generally software of this complexity will have a few bugs and as they are found 
and fixed the replacement firmware will be posted on this site.


If you are building the GPS Synchronised Clock from the March 2009 article in 
Silicon Chip then please take note of the following:

1.  In Fig 1 and Fig 2 the markings for the GPS voltage selection were reversed.  
    To set the circuit to 3.3 volts to suit the EM-408 module the jumper must be 
    placed on the pair of pins nearest the PIC chip, i.e. opposite to that shown 
    in the photographs.

2.  Figure 4 (Experimenting with the GPS module) should be modified as follows:
       Replace the connection from pin 12 of the MAX232 to pin 3 of the GPS
        module with a 4.7K resistor.
       And connect a 10K resistor from pin 3 of the GPS module to ground.
    Without this modification the EM-408 GPS module may be damaged by excessive 
    voltage on pin 3 (serial data input).

Also note that there are errors in the description of the PC interface cable.  The
web site listed above has the correct description.
