Multi-functional safe energy-saving timing socket
2009
The utility model creatively discloses a multi-functional safe energy-saving timing socket, belonging to the application field of electric control and automatic technique. The socket consists of a buck circuit, an MCU control circuit with low power dissipation, a dual-power supply clock circuit, a keyboard input and liquid crystal display circuit, a relay switch circuit and a standard socket that are connected with one another. The socket is mainly characterized in that the I/O input terminal of the MCU is connected with a mode key, an increment key, a reduction key, a Tab key, a confirming key and a liquid crystal screen electricity-saving key; the I/O output terminal of the MCU is connected with four switch circuits that are connected with four relays respectively; and a clock chip is connected with the I/O input terminal of the MCU and the displaying of the liquid crystal screen is driven by a software. In the utility model, a weak current control part adopts ways of resistance-capacitance coupling and power supply of a DC/DC module, and the fire wire and zero wire of each circuit out of four relay switch circuits of a strong current part are connected in series with fuses respectively and be subsequently connected with dual normal-open contacts; and the other ends of the dual normal-open contacts are connected with the fire wire terminal and zero wire terminal of a standard socket.
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