Design of Digital Control DC Voltage Source Based on AT89C52 MCU

Abstract

the system to DC voltage source as the core, AT89C52 MCU as the main controller, the output voltage to set the DC power supply through the keyboard, with a step function voltage to reality, the actual output value. This design is divided into four modules: SCM control and display module, digital to analog (D/A) conversion module, a constant voltage source module, output module. MCU control module as the core, the input signal is converted to digital quantity output; constant current source module voltage D/A conversion to analog conversion into constant pressure through a constant voltage circuit. The system has good reliability, high precision.

The Design of Signal Generator in Motor Function Rehabilitation Based on MCU

“…By analyzing the time domain characteristics of common waveforms and the movement-related neural signals, we designed the corresponding MCU program, then the expected waveforms can be generated as signal sources of this therapeutic apparatus. Results:This signal generator is able to produce series of waveforms in the time domain, such as sine wave, rectangular wave, triangular wave signal, and neural signal bands related with movement .Conclusion: Compared with the traditional signal generators [1] , this signal generator has the advantages of simple structure, complete functions, low cost and convenience. Using movement-related neural signals which were collected from animal experiments as signal sources is helpful to induce the coordinated movement and reduce the muscle fatigue.…”