I basically want to make on of these: I have read this thread (http://www.controlbooth.com/forums/sound/7853-clearcom-diy-cans.html) and I am thinking that I can just take the right LED and some resistors, connect it to the right pins and it will work. But I know that it will be more complicated then that... I see no reason to have a tone, it would be nice to have a brightness control, but if its only a single LED I dont think its necessary. It really doesn't need to flash, just light up when the call button is pressed. Has anyone built something like this, or have any ideas to where I could get started?