Hi, i want to use a RGB-LED to show computer-controled color fades. after finding the linux lm78 project, i decided to try to use the SMBus. The MAX520 http://dbserv.maxim-ic.com/quick_view2.cfm?qv_pk=1251 is a quad digital to analog converter that _should_ be easy to connect to an asus board with smbus pins, using one DAC per color. But, will the RGB-LED work as expected? It has different voltages per color: red: 2,0V gree 2,2V blue: 4,5V so, i thought it might be enough to limit the digital value, eg not output 0-255 for red, but only 0-98 or so. anyway, i know that the brightness of an LED depends upon the current, so will this circuit really fade the LED or just turn it on above a certain threshold? Please enlighten me... thanks, touchstone
