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In this paper a multi-spots temperature monitoring and alarming system based on a person computer is designed. The system consists of a person computer as a host and a subsystem as a slave. The host can communicate with the slave by its serial port. The host can also control the slave and receive temperature value from it that can be displayed on the screen of the host. The host will alarm when the...
This paper illustrates the basic work principle of a brushless DC motor and presents its control method. According to the method, a control system of a brushless DC Motor is designed using an AVR microcontroller. Design of the control system includes hardware circuit designing and software programming. The hardware structure of the control system consists of a microcontroller ATmega64, power supply...
In order to effectively control the operation of linear compressor, a new control system based on bidirectional triode thyristor was proposed. According to the running requirement, the hardware and software of the control system were developed. The control system is mainly composed of a synchronous pulse circuit, a trigger pulse circuit, a display circuit, a protection circuit and a current detection...
The electrical transformer online monitoring system is made up with single chip system, data collection circuit, control circuit, display circuit, alarm circuit, communication circuit and so on. By using numerical temperature sensor, simulation input channel of cooling fan and signal changing circuit of oil velocity, oil temperature, working current of cooling fan and oil velocity are sent to the...
Based on the Proteus simulation software, the circuits of MCU controlling LED clock have been designed. The circuits include four parts: Hardware design, software programming, software simulation and physical display. Eventually, through the Proteus software simulation and physical display prove that the method of the circuit design is correct. This paper systematically introduces the design method...
Bunch planting with water jet is a kind of untouched soil planting, which uses high pressure water-jet to form a hole and seed in it. Firstly, the water-jet planting of seed and water controlled separately has been designed. The seeder includes three parts, the equipment of high-pressure water supply, precision seeding system and seed-metering device and controlling system,is a set of mechanics-electronics-hydraulics...
This paper introduces a new design method of digital thermometer to achieve temperature display, which uses AT89C52 as the main control device, DS18B20 as the temperature sensor, and anode with a total of three LED digital tube to transmit data. Its hardware circuit includes the main controller, temperature measurement circuit and display circuit. Compared with the traditional thermometer, it has...
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