I want to build a simple USB lamp (maybe colored LED lamp) which will be controlled by PC. So, actually, i want to get practice in linux kernel modules development, but i need to get appropriate schematic. It is clear for me that basically i want to switch on and switch off this lamp from userspace utility, which will manipulate with device through the driver. Further, maybe, i will add lamp color changing using principles from this article http://www.diylife.com/2008/01/25/make-a-usb-color-changing-light/
But now i want to understand one thing, as i said before, i want to build a scheme with lamp and without microcontroller, which will connects to PC through the USB interface. And i want to manipulate (switch on switch off and further maybe color changing) this lamp directly using usb data channel. Is it possible? Can anybody helps me to find appropriate schematic? Thanks.