This system based on STC89C52 microcontroller as the control unit, microcontroller can bring the function can be classified into four categories: control, monitoring, judgment, sexual and communications. At present, the SCM in many power design of the function is mainly monitoring. Therefore, microcomputer in monitoring the input voltage, the input current, output voltage, electric current and temperature on the output signal is ideal choice. Using linear dc voltage output technology, the digital quantity control dc voltage of linear output voltage, achieve the benchmark voltage dc voltage stabilizing the purpose of realizing CNC. And can realize output voltage by buttons of stepping increase and decrease, through digital tube of dynamic scanning display output voltage. Still USES the memory chips, and realize suddenly loses power of output voltage when the storage, so again when power output voltage, namely, realize the last system memory function.
Analog/digital converter and storage circuit USES is IIC bus connections, IIC bus the main advantage is its simplicity and effectiveness. Because interfaces directly in the component above, so the IIC bus occupy very little space, reduce the circuit board of space and chip tube number of feet, reduced cost. Reduce the complexity of the circuit, the circuit attachment more concise, save the I/O mouth resources.
The numerical control dc voltage stabilizer system, have a certain range stable output dc voltage, which has certain stepping adjustment, output voltage display function. Not only can be used as a conventional research and test for power supply, and can through programming method makes manostat produce continuous variation of the output voltage, as electronic products (such as sound effect, etc.) properties (such as zero drift, dynamic distortion etc) test with the power source, thus achieved multi-usage, improve the efficiency of the instrument used purpose.
Keywords: DC Voltage；Computerized Numerical Control；IIC Bus；Single Chip Microcomputer
