How to control strong current from weak current? Realize efficient and safe household electricity consumption.

People's lives have long been inseparable from electricity, so do you know anything about electricity? I have introduced the weak current project to you before, and I believe you have a certain understanding of weak current and its application. So how can weak current control strong current? Today I will discuss this problem with you.

Before discussing this problem, we should first understand the difference and connection between weak current and strong current. "Strong electricity" is characterized by power transmission, which generally refers to electricity in power systems, such as 220v lighting electricity and 1000v industrial electricity. , high voltage and low frequency; "Weak current" is characterized by signal transmission. Almost all electronic products have weak current, such as mobile phones and computers. Its current and voltage are small and its frequency is high. Generally speaking, strong electricity can't be touched, otherwise it will lead to life-threatening, while weak electricity is not dangerous, so people need to control it with weak electricity when using strong electricity.

Weak current system is suitable for control, easy to operate, and the system is safe and reliable. Widely used in high-voltage power systems will greatly improve the high-risk and difficult operation of the original high-voltage network. In the process of controlling strong current with weak current, the most common way is to generate weak current signal with single chip microcomputer. SSR is used to control the high-voltage working circuit switch, and the weak current of 5V can finally control the strong current of 220V, thus reducing the danger and facilitating the control of various electrical appliances, such as medical atomizers. Let's understand how the single-chip microcomputer and solid-state relay are applied:

1. Single chip microcomputer

Single chip microcomputer has the advantages of small size, light weight, high integration, strong anti-interference ability and high cost performance. According to different programs, single-chip microcomputer can perform different tasks of weak current control and strong current control, but its application is more extensive, and it can be used for automatic control, customized device and temperature and humidity monitoring to realize signal processing. Write a program for the microcontroller in advance. When the probe of the single chip microcomputer detects that it is not within the set program range, it will output a signal to the solid-state relay to control the start of the working circuit and let the high voltage start.

2. Solid state relay

Solid-state relay is an ideal component to control weak current and strong current. Its input control voltage is low, and it is compatible with TTL and VMOS. Solid-state relay is isolated in input and output, safe and reliable, without contact, noise and sparks. When the input terminal receives the signal from the single chip microcomputer, the switch is closed and the circuit at the output terminal starts to work.

Weak current controls strong electric energy, making it safer to use electricity. But with the development of science and technology, there will be a lot of room for improvement.