I have this idea for an HDD activity LED mod. Basically, depending on the amount of HDD activity, it would trigger an unknown amount of LEDs to light up, spelling a phrase. So let's say the phrase is HDD. With a little activity, H would light up, but with a lot of activity, such as boot, HDD would be lit up. I don't know how plausible this would be, however, because from what I've seen, the HDD LED is just triggered by current on the 39th wire in an IDE drive or something. The only way this would be possible is if the amount of current were to vary. If this were to be the case, how would this be done? Would I have to program a microchip, or just design and order a PCB? What phrases would you guys suggest (my first Idea: "oh shit!; 7 LEDs").