I would like to use a radio receiver to turn a device on and off.
The idea is that when the signal is received, the device is turned on, and when the signal stops, the device turns off.
I want to use an antenna and a tuner to receive the radio signal.
I am assuming these components are all that is needed to receive the signal, and that amplification of the signal is not necessary - is this correct? If the device is turned on by detecting the presence of the signal, and turned off by detecting its absence, is it necessary to process the signal (i.e. amplify, demodulate) once detected?
As long as the signal is received, will it matter how strong/weak it is?