This paper introduces the hardware structure, software design and specific implementation of speed regulation scheme of brushless DC motor controller based on PIC16F873A. This controller adopts current single closed-loop control strategy and PWM speed regulation mode to control brushless DC motor. 　　The validation shows that the controller has simple structure, stable and reliable performance and

For LRXAY-8 printer, a portable angle measuring device is designed to record the rotation angle of the printer’s spindle. The device has only three buttons: the “Set/Clear Start” key, ” ” key and “_” key, which can complete the angle measurement and the change and storage of measurement data. Printers play an important role in

With the rapid development of social economy and the improvement of modern science and technology, programmable logic controller (hereinafter referred to as PLC) has been widely used in automatic control of industrial production, especially in the automatic control of coal mine production and transportation, because of its advantages of convenient programming, simple structure and good

The application technology of PLC (Programmable Logic Controller) has a good application value for improving the practical professional skills of the students majoring in maintenance electrics, helping them to learn theoretical knowledge and operational skills, and also increasing great advantages for their future employment. 　　Based on many years of practical teaching and the characteristics of

For the apartment security problem, the apartment security controller is designed by using the FPGA. Real-time perception and monitoring of the room’s security status are carried out by using a variety of sensors. By receiving and analyzing the data of different sensors, the security controller realizes the functions of false alarm, fire alarm, anti-theft alarm

Temperature control is widely used in industry, such as boiler temperature control systems in iron and steel plants, power plants, chemical plants and so on. It aims at the large inertia, large delay and non-linear characteristics of main steam temperature control objects in thermal power plants. The PID control algorithm combined with the fuzzy control

A method of using field programmable gate array (FPGA) to complete multi-axis stepping motor controller is proposed. Using IP planning thinking, the motion control of stepping motor is completed by hardware circuit (IP core of stepping motor), and the trajectory calculation is completed by the microprocessor (NiosII soft core) on the same chip. Then the

In order to adapt to the environmental conditions of steam condensation water temperature in Guangfeng Cigarette Factory, which is generally about 70 C and pH 9-11, a new type of photoelectric level controller is designed and applied in practice. 　　The device realizes the functions of water level detection, signal transmission, control of pump motor and

Greenhouse environment is a complex and changeable controlled object, and it is impossible to establish an accurate mathematical model.The climate change in Jiangsu and Zhejiang is obvious in four seasons, but the control mode of the existing control system is fixed, which makes it difficult to achieve the desired control effect.Based on the research of

With the acceleration of urbanization in China and the widespread popularity of the Internet, people are increasingly demanding for home safety [1,2]. Due to the fragmentation and inefficiency of the existing access control system, this topic adopts the form of networking to design the access control system. Through the use of STM32F chip and other