Power electronic equipments closely related with people’s working and living, while electronic equipment can’t be separated from a reliable power supply. The technology of Numerical Control Power Supply is a strong practical engineering, service for all walks of life. Today, the power supply technology includes electrical, electron, system integration, control theory, material and other areas. The design can bring out different voltage through the regulator circuit, using for different micro-controller, although it can show the number of voltage to protect the electronic devices.
The output of the system produces through LM317, then doing digital-to-analog conversion by ADC0809, and transporting the date into micro-controller. The micro-controller processes the data, and shows the voltage on the numerical code tube. It can change voltage by potentiometers. The LM7805 gives the energy to micro-controller. The main chip of this system includes AT89S51, LM317, LM7805. ADC0809 and numerical code tube.
Keywords: Digital-to-analog conversion, Numerical code tube, Regulator circuit, Micro-controller
