Intelligent switches have a great impact on smart homes. Smart switches are essential products in smart homes. Intelligent switches are essential in a complete smart home system. However, there are still some problems in the implementation of smart switches, which affect the intelligence of the home to a certain extent. 1, installation problems When it comes to the installation of switches, you have to mention the traditional switch wiring. Smart switches have been around for a long time, but the biggest problem encountered when entering the market is on the installation wiring. Most ordinary households at home and abroad are single-fired wiring. When the traditional switch is intelligently upgraded, it is often required that the new intelligent switch can directly replace the old mechanical in-wall switch, and it will be widely accepted by the market without wiring. No one wants to pierce the wall in order to install a switch. It will not only increase the installation cost, but also easily damage the overall decoration style of the family. 2, technical defects But the working principle of smart switches and traditional switches is quite different. Conventional switches can be used as long as they can mechanically cut off the communication circuit. However, in order to realize intelligent control, there must be two situations of connection and standby waiting, and the smart switch must have power supply to work normally during standby. If there are two zero-fire lines in the wall switch, this problem can be easily solved. However, in the case of single-fire system, there is no need to re-wire, and the technology that needs to be powered on the single-fire line must be obtained. Electrical technology. However, due to the fact that the single-fire power-taking technology is not perfect in recent years, it has brought some hidden troubles and limitations to the smart single-fire switch. The single-fire line switch takes power from the control circuit of the smart switch through the current flowing through the appliance. If the standby input current is too small, the standby circuit will not work properly. If the input current is too large, the appliance will be made. Can not be turned off, especially high-impedance electronic energy-saving lamps and LED lights, especially sensitive to standby current, will turn off after closing, for example, some lamps will also appear flashing or slightly bright, also known as "ghost fire" phenomenon. Conventional single-fire power-taking technology in order to achieve balance, the power of the controlled electrical appliances can not be too small, nor too large, there are strict limits on the control power (universal 5-700W), but now LED lights below 5W are very common. This is actually an invisible limitation of the control range of intelligent switches. Some even add a capacitor or resistor directly to the switch, making the smart switch easy to heat, leaving a huge hidden trouble to the switch. In fact, with the continuous advancement of technology, the problem of intelligent switches has basically been solved, and the application in smart homes is becoming more and more extensive. Ceramic Pressure Sensor have the characteristics of high
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