I am new to the arduino platform. I want to use a simple LCD based off the HD44780 controller (16x2), to make a real time clock. Is there source code out there for this, or a built in clock example available some where? Thanks
Another member posted about a clock he made a few days ago. The project is largely about its internet connection, but you might find it feasible to pull the display code from it.
Ran
The code in that thread is very complicated because it uses Ethernet to get the time from a NTP timer server.
There is an example clock in the playground that syncs the time from a PC : Arduino Playground - DateTime It uses the Serial library but the code can be easily changed to use LiquidCrystal.
this thread has example clock code for LiquidCrystal and also the older LCD4Bit library: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1234897238
all the above use the Arduino onboard crystal to keep time. If you want battery backup, have a look at implementation that use external real time clock hardware: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1191209057