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.

==================================================================================
This download contains version 2.1.  The only change in this version is to fix a 
bug which causes daylight saving (DST) to start or end a week late when the Sunday 
for the end or start of daylight saving falls on the first day of the month.
                                                    Geoff Graham  3rd April 2012
==================================================================================

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.
