Single live wire power-getting circuit

Abstract

The invention discloses a single live wire power-getting circuit. The single live wire power-getting circuit comprises a silicon controlled rectifier circuit, a switching mode power supply circuit and a micro control unit (MCU) circuit, wherein the silicon controlled rectifier circuit gets power from a live wire; an input end loop of the switching mode power supply circuit is connected with the output end of the silicon controlled rectifier circuit; the switching mode power supply circuit outputs stable direct voltage with high loading capability to the MCU circuit; the input end of the MCU circuit is connected with the signal output end of the silicon controlled rectifier circuit; and the output end of the MCU circuit outputs a sequential control signal to the signal receiving end of the silicon controlled rectifier circuit to adjust a conduction angle of the silicon controlled rectifier. In the invention, the zero crossing point of alternating current is detected in real time through the MCU circuit, so that a control signal is transmitted, control over the conduction angle of the silicon controlled rectifier is realized, and the aim of regulating load light is fulfilled. For the MCU circuit, the conduction angle of the silicon controlled rectifier can be controlled through a keypad and wireless data to fulfill the aim of regulating the light. The single live wire power-getting circuit can ensure the stable operation of the rear-end switching mode power supply and provide stable voltage for rear-end equipment for operation at the same time of light regulation.

Description

technical field [0001] The invention relates to a wireless single live wire dimming circuit, in particular to a single live wire power-taking circuit, which can supply the back-end wireless module to work after the power is taken. technical background [0002] In the smart home control system, the current single FireWire products on the market have the following deficiencies through test results: insufficient power supply to the back-end wireless module, problems such as inability to connect large loads, etc. For example, the zigbee wireless chip needs current when sending and receiving data More than 30mA, the wireless single live wire products on the market are suitable for wireless technologies such as 433 / 315 that only require a small current (hundreds of microamps to several milliamperes) to work, and cannot be applied to the single live wire work of the zigbee chip. Contents of the invention [0003] The technical problem to be solved by the present invention is to p...

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Problems solved by technology

[0002] In the smart home control system, the current single FireWire products on the market have the following deficiencies through test results: insufficient power supply to the back-end wireless module, problems such as inability to connect large loads, etc. For example, the zigbee wireless chip needs current when sending and receiving data More than 30mA, the wireless single live wire products on the market are suitable for 433 / 315 and other wireless technologies that only need a small current (hundreds of microamps to several milliamperes) to work, and cannot be applied to the single live wire work of the zigbee chip

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