Programmable inline switch (or, how to help your houseguests turn off the lights)? Answered
So, after battling with houseguest after houseguest, I've hit my end. Beyond giving them flashlights and nothing more, is there a way to build an inline timer that can be variably set? Something to sit between the switch and light, and I can set it to 10 minutes for some, 20 for others, and always on?