The function of the relay is to transmit signals or control multiple circuits at the same time. It can also be used directly to control small-capacity motors or other electrical actuators. Its structure and AC contactor are basically the same, but the electromagnetic system is smaller and the contacts are more. some. The working principle of the relay is to make a certain input quantity (such as voltage, current, temperature, speed, pressure, etc.) to move to change the working state of the control circuit to achieve the intended control or protection. In this process, the relay mainly plays the role of transmitting signals. Commonly used intermediate relays are mainly JZ7 series and JZ8 series, the latter is AC and DC. When selecting an intermediate relay, the voltage level and the number of normally open and normally closed contacts are mainly considered. What role does the relay play in the circuit? Next, we will share a relay wiring diagram and give you a brief introduction.

    1. Nowadays, smart homes are very popular. We can use the mobile phone to switch on the electric fan. Among them, the relay is working.

    2. We use electricity every day, if we accidentally get an electric shock, if there is an automatic protection device after the electric shock, it will automatically cut off the power supply and play the role of protection. There are also relays.

    3. The internal structure of the relay is actually a switch. This switch is special. It can generate a magnetic field by current, and then cut and close the switch through the magnetic field.

    4. In practical applications, it can be seen that the more common circuit is that the MCU controls the relay through the triode, and the relay controls the switch of the high current device.

   5. Relay selection, you need to select the appropriate relay according to the control voltage and the controlled voltage, and the number of groups to be controlled.

    6. Through the above understanding, you can select the appropriate relay according to your own project, and the future relay will play a greater role in artificial intelligence.