The post on how to (light an LED from an RS232 serial port) got more interest than I expected. There is an old design that I played around with a couple years ago for a high-power RS232 serial port LED light that I am thinking of resurrecting. It’s so bright, it hurts to look directly into it! A USB version might also be nice, but RS232 has a great advantage in distance and most of the people we talk with need something more rugged than USB. You can run serial lines to the LED controller for over 100 feet under good conditions. The only thing that really competes with that is wireless or Ethernet.
Note to self: Ethernet LED controller? Hmmm.