Im looking to control about 20 High power cree leds, probably around 3 watts each. I want to use a microcontoller to control the dimming effects of the leds, and a DS1307 RTC chip to control what time the leds turn on and turn off. I will be using an LM304 constant current regulator to allow 1amp of current into the leds. I was just wondering how I would go about interfacing the DS1307 with a PIC microcontroller such as a PIC16F84 and what type of programming I will need to do.