How do I make a battery-operated signaling light that can be wirelessly turned on at a distance?
I want to construct a device that can turn a switch (probably for a light) on and off at a distance, but does not use IR (LOS not an option), and that can run on batteries. The intended use is for possible theatrical applications (remote actor cueing) and possible home security (a "help me" signal between floors).
I have very little electronics experience but had can make circuits for things like switching on wired LED's. I would like to know what components I can use and how to hook them up, also maybe where to get them.