At present, energy conservation has become an urgent problem to be solved in China now and in the future. Solving standby energy consumption is an important part of energy saving. The standby energy consumption of some household appliances (such as printers, scanners, stereos, etc.) not only increases the daily electricity expenses of consumers, but also causes great waste of power resources. Sometimes people leave the Power Supply when they leave, or only power off or shut down the main equipment. The external equipment of the general equipment is easily overlooked and often in standby mode. For example, the computer has been turned off, and the external devices such as monitors, scanners, printers, and stereos connected to the host are likely to be powered. The TV is turned off, and the DVD, set-top box, or stereo connected to the TV may be in normal operation or standby. People often ignore the power consumed by standby devices in such situations.
In line with the principle of energy saving and emission reduction, this design will improve the ordinary plug-in into an intelligent plug-in. The external device can be automatically powered off or powered according to the operating status of the master device.
1.2 Project Background / Motivation
In order to solve the problem of standby power consumption, there are already some timing sockets on the market, and these products have many shortcomings. Some timing mechanisms are too simple to be set up for many days or periodically. Some use ordinary relays to supply power to the control circuit. When the power is turned on or off, the coil needs to be powered. It requires energy outside and consumes a lot of power. Some features are single, making the cost of the plug is lower.
The smart energy-saving plug-in for this design. In addition to timing on and off and automatic turning the external device on and off, it also has a date and time display, power recording (including daily power, monthly power) and real-time power display. Under the condition that the hardware is not increased, more functions are realized, and the cost performance of the device is improved.
Second, the demand analysis
2.1 Functional requirements
The intelligent energy-saving plug-in structure based on AVR as the main controller is shown in Figure 1. In this design, the main functions are as follows:
1. All ports on the plug can be configured in three states: main jack (only one main jack), auxiliary jack (multiple can be set, with the main jack), normal jack (not with the main jack, always Is in the on state).
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