How to make my own peripheral device?

[Sharft6]

Does anybody know of any tutorials that I could use to learn to make my own peripheral devices for my computer?

e.g. An LED connected to a USB cable connected to my computer and some software that allows me to turn the LED on and off.

Something simple would be a nice start Maybe some day I could make an army of robots to do all my chores

 

[arrghushakaboorga]

I have not done that before, however a place to start if you have not done anything might be to use a c8051 or similar microcontroller and write an embedded C program. This can allow you to control the light with a pushbutton or slide switch. I do not know how to do something directly from the PC but you can probably start with that, maybe use a usb to serial cable. etc. good luck