Hardware Analysis and Research of NC Power Supply Based on Single Chip Microcomputer

This paper is a numerical control power supply system controlled by single chip microcomputer. The single chip microcomputer is used as the core digital control chip to control the analog output voltage of the digital to analog converter (TCL5615), and then the analog output voltage passes through the operational amplifier and MOS transistor (IRF9Z24N) to form a negative feedback system, so as to output a constant voltage. The output signal is fed back to the operational amplifier (lm358) through the potentiometer voltage divider, so that the accuracy of the output voltage can be adjusted. Through the keyboard circuit and MCU connection, read the control data, use the software to judge, so as to control the power output. The output voltage of NC power supply is displayed by digital tube to realize simple man-machine dialogue. It has the advantages of simple design, flexible control, convenient adjustment and low cost, and also has strong practicability.