Originally Posted By: andym
i seem to remember the empeg guys having a broken build beacon which was one of those rotating red lights you used to see on police cars before they got all fancy and starting using LEDs.

It worked over X10: an X10 controller on a serial port in the server room, and an X10 mains relay in the ceiling above the red light -- so it didn't actually send RS232 over powerline. The light itself came from a disco supplier.

Peter