Ask for information on high precision CNC DC current sources

An ammeter is made based on the action of an energized conductor in a magnetic field by the force of a magnetic field. There is a permanent magnet inside the ammeter, view the atlas [sjkj ammeter and voltmeter: 10 sheets] to generate a magnetic field between the poles, there is a coil in the magnetic field, there is a hairspring spring at each end of the coil, the spring is connected to a binding post of the ammeter, between the spring and the coil is connected by a rotating shaft, and there is a pointer at the front end of the rotating shaft relative to the ammeter.

The pointer is deflection. Since the magnitude of the magnetic field increases with the increase of the current, the magnitude of the current can be observed by the degree of deflection of the pointer. It's called a magnetoelectric ammeter, and it's the kind we usually use in our labs.

1) Main design content:

1) Output control of CNC DC current source.

The purpose of the system design is to replace the manual rotation potentiometer in the traditional DC regulated power supply with a microprocessor, so as to realize the continuous adjustment of the output voltage and the high accuracy requirements. The analog output of the DAC is used to control the reference voltage or voltage divider of the power supply, or other more efficient methods, so how to choose a simple and effective method is the primary problem to be solved in this problem.

2) Complete function of CNC DC current source.

The CNC DC regulated power supply should realize the keyboard output control of the voltage, and at the same time should have the functions of output, overvoltage and overcurrent protection, array storage and presetting. In addition, the power supply should also be able to select some special functions at the touch of a button, depending on the requirements. How to effectively implement these functions is also a problem that needs to be studied and solved.

3) CNC DC current source microcomputer processing system.

In this design, a single-chip microcomputer is mainly used for processing, which involves the minimum system composition of a single-chip microcomputer, the single-chip microcomputer keyboard connection, the output module of the single-chip microcomputer, and the real-time display of the size of the regulated DC power supply.

4) Real-time adjustment of CNC DC current source.

In this design, the digital tube display is used to intuitively reflect the size of the regulated DC power supply, so that the operator can accurately, real-time and more efficient adjust the value required by the power supply when using it.

I think it's easier to use a single-chip machine, but I'm not going to do it.

Do you want to do a power supply? Whether you are doing switching type or transformer transformer type, the control part is relatively simple, you need to be able to tell you about the control principle.

Is it a PCB or what? What does it mean to say so?