code to run an analog RGBW strip from arduino, including a chronodot real time clock (RTC) and TimeLord library to get sunrise/sunset times for auto on/off. This is pretty messy code. I want to improve by using SQW from the RTC into pin5 to run T1, but this dorks with PWM on pins 9 & 10 and I already soldered them ;-).
https://www.arduino.cc/en/Tutorial/SecretsOfArduinoPWM
http://playground.arduino.cc/Main/TimerPWMCheatsheet
http://docs.macetech.com/doku.php/chronodot_v2.0