A wireless socket with a remote control is an innovation in the modern electrical appliance market, but the technology itself, which allows you to use such a wonderful thing in everyday life, is quite old and transparent to understand.
General scheme of interaction
A wireless socket with a remote control has almost the same operation scheme as any modern remote-controlled device, be it a TV or an air conditioner. The socket contains two elements: the remote control and the device of the socket itself.
Each of the components has its own power supply: the socket is powered by a household power supply, and the remote control contains a battery. The general scheme of operation of such devices is to transmit a signal from the remote control to the outlet itself. In this case, the signal may contain some multicomponent information, which is determined by the specific features of the device model.
It is worth noting that this socket is not built into the wall of the house, but is connected as an external socket, allowing you to close and open the contacts between the old socket, which is built in, and the new one.
Signal transmission
The signal sent from the keypad to the outlet is an infrared radio frequency signal. This type of signal is most often used for remote control purposes. The signal is generated in the control panel. By pressing one or another button on the remote control, you start a whole chain of creating an IR signal, each of which has a certain carrier of a certain frequency, on which an information signal is separately superimposed.
The information signal is a radio frequency wave, one of the parameters of which changes according to the information sent. This parameter can be the amplitude, phase or frequency of the wave. This transformation of a radio wave is called modulation. Depending on the method of information transmission, there are amplitude, phase and frequency modulation.
For example, if a given socket only has the ability to turn on or off remotely, the remote control must be able to generate only two possible information signals: the socket is turned on and the socket is turned off. This can be done by setting one of the options one specific oscillation amplitude of the information radio wave, and the other option - another. The information signal is mixed with a carrier serving only for wave propagation and reaches the receiver located inside the socket itself.
The signal receiver is designed so that it is able to distinguish between the types of signal and make the appropriate decision. In this example, the receiver decodes or demodulates the signal, extracting information about the state of the socket from it. This state is transmitted to the control device, which closes or opens the contact of the socket with the general power supply.
