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If you are on a mac, go to /home/documents/arduino/ and make a folder called ledcontroller, put all the .pde files in there and next time you start the arduino ide it will be in your sketchbook. That code currently supports a ds1307 Real Time Clock (much cheaper than the sparkfun one), and you...

My code is open source, you can find it here: nerdwork-reef-controller - Arduino based controller for reef aquariums - Google Project Hosting Feel free to take a look, change it, or do whatever you want with it. I am constantly adding new features to it so check back here and there.

arduino I just completed this project myself, there's a simplified build thread here: Mike's 4ft LED fixture One thing I should mention is it is much easier/cleaner to use a transistor (I used a 2n2222) as a switch instead of an amplifier to convert 5v pwm to 10v pwm. So hook up the arduino...