How to choose an air switch The general principle of air switch selection: The rated voltage of the air switch must be greater than or equal to the rated voltage of the line; The rated current of the air switch and the rated current of the…

How to repair the circuit board?Online measurementStep 1: Power on the board. In this step, it should be noted that some boards are not single, they may need 5V, and they need positive and negative 12V, 24V, etc. Don't add the added power.…