In fact, the audio signal is converted into an electric frequency signal, and the electric frequency signal controls the water pump through a frequency converter, so that the pressure of the water pump changes with the rhythm of music. This is what it looks like! If it is deeper, it is that the water column is controlled by a water pump, and the water pump is composed of a three-phase asynchronous motor. If the speed of the three-phase asynchronous motor is connected to a power frequency power supply, the speed will not change, and the frequency converter is a device specially designed for motor speed regulation. The speed of the motor is controlled by the frequency converter, so that the water column changes. Changing the frequency changes the speed of the motor, which also changes the pressure of the water pump. The different frequencies of music are sent to the control end of the variable frequency motor through single-chip microcomputer processing, so that the speed of the motor changes with the tone, rhythm and strength of the music, and the pressure of the water pump changes accordingly, and the sprayed water changes high and low, and several sets of equipment control multiple groups of nozzles. Fountains are formed by pumps. Convert the rhythm and intensity of music into a control signal, which then controls a voltage control device. After the power supply passes through this voltage control device, the output voltage also changes with the change of music, and then control the running speed of the water pump motor! This is a little deeper, so some things are a bit difficult to understand, and you need to understand it slowly!