BEC.SHAPIN@USC-ECL.ARPA (Ted Shapin) (12/16/86)
I would like to build a LED driver that will light when a line is in use. I guess I could use a CMOS inverter and drive it from the line. Does anyone have a circuit? Ted. [DAK sells this circuit as "Drew's Brainstorm" for ~$10. A 9-volt battery eliminator is recommended by yours truly. -Elmo]