I posted this project in the Automation, sensing and robotics Project section of the forum:
Raspberry Pi - Sunrise/Sunset Timer for Christmas Lights
The software used in this project is Java based and open source. (available on Github)
I am using the Pi4J project to control the GPIO hardware on the Raspberry Pi.
Just in time for the holidays ..
A very simple Raspberry Pi project to control your (exterior) Christmas lights based on the calculated sunrise/sunset times for your location.
http://www.savagehomeautomation.com/pro ... ights.html