Based on the Design of the Single Chip Microcomputer Numerical Control Constant Current Source

2014 ◽  
Vol 926-930 ◽  
pp. 1226-1229
Author(s):  
Zhi Jian Yin ◽  
Qiang Luo ◽  
Kun Xiang ◽  
Fan Wang
Keyword(s):  
Current Source ◽  
Current Control ◽  
Numerical Control ◽  
Constant Current ◽  
Single Chip ◽  
Output Current ◽  
Single Chip Microcomputer ◽  
Constant Current Source ◽  
Display Module ◽  
Lcd Display

This system based on single-chip microcomputer control, with buttons and LCD monitor as the man-machine interface of numerical control dc power supply. System is mainly composed of rectification filter circuit, the output current control module, LCD display module current and voltage controlled constant current module. Button to SCM number controls the size of the output current DAC0832, LCD display the current value. This system controlled by single chip microcomputer DA output, make the whole circuit system has a stable output current, step precision is high, easy to control, etc.

The Design and Implementation of Intelligent Street Lamp Control System

2012 ◽  
Vol 195-196 ◽  
pp. 1055-1059 ◽  
Author(s):  
Li Gong Cui ◽  
Yan Yan Cao ◽  
Mei Lin
Keyword(s):  
Control System ◽  
Current Source ◽  
Control Unit ◽  
Constant Current ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Constant Current Source ◽  
Keyboard Input ◽  
Street Lamp ◽  
Software And Hardware

Aiming at existed problems in traditional lamps and monitoring system, an intelligent street lamp control system based on AT89S52 as the control unit is put forward. It consists of keyboard input, clock testing and display circuit. The system uses constant current source to drive the lamps with dimming capabilities, and makes use of photoresistor to test the brightness of environment. It also alarms by the way of light and sound when the lamp fail to light. In this paper, we design software and hardware of the street lamp control system, and realize the design concept the method and the process of intelligent street lamp control system based on the single chip microcomputer.

Design of Digital Control DC Voltage Source Based on AT89C52 MCU

2014 ◽  
Vol 484-485 ◽  
pp. 1126-1129
Author(s):  
Wei Wang
Keyword(s):  
Current Source ◽  
Step Function ◽  
Constant Current ◽  
Voltage Source ◽  
Constant Voltage ◽  
Good Reliability ◽  
Constant Current Source ◽  
Display Module ◽  
Dc Voltage ◽  
The Core

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 Digital Direct Current Source Based on Nios II

2013 ◽  
Vol 313-314 ◽  
pp. 316-319
Author(s):  
Qing Qing Fu ◽  
Ai Ping Wu
Keyword(s):  
Direct Current ◽  
Field Effect Transistor ◽  
Current Source ◽  
Hard Core ◽  
Constant Current ◽  
Output Current ◽  
Constant Current Source ◽  
Nios Ii ◽  
Effect Transistor ◽  
Current Value

In this paper, a digital direct current source based on Nios II is studied. The system adopts FPGA as hard core and the main circuit of constant current source consisting of operational amplifier LM358 and power Field Effect Transistor (FET) IRF530. In addition, 12 bit D/A chip MAX531 and 12 bit A/D chip TLC549 are used to monitor the output current. The system outputs current from 20mA to 2000mA with 0.5mA step level, the set current value and actual output current value can be displayed by LCD. Result shows that the system has characteristics of high precision, good stability, small size and high integration.

The Control of Constant Current Source in Electrostatic Precipitators Based on Microcontroller

2014 ◽  
Vol 910 ◽  
pp. 340-343
Author(s):  
Zi Sheng Zhang ◽  
Xiao Dong Shi ◽  
Li Fang Liu ◽  
Zhan You Wang ◽  
Deng Yuan Song
Keyword(s):  
Control System ◽  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Current Source ◽  
Control Process ◽  
Pulse Signal ◽  
Constant Current ◽  
Single Chip ◽  
Constant Current Source ◽  
Electrostatic Precipitators

In order to improve the efficiency of electrostatic precipitators, a control system of constant current source based on Single Chip Microcomputer (SCM) is designed. In the control process, we use the pulse signal from microcontroller P1 port as digital signals of the switch. By changing the number of contact closure control, we achieve steady flow output of different magnitude. By using closed-loop feedback control, we achieve constant monitoring of dust concentration and ensure it compliance with outlet concentration of national requirements. The results show that microcontroller control system has a strong anti-interference, high accuracy, ease of programming, etc. Used in the electrostatic precipitator, collection efficiency can be further improved.

Research of High Precision DC Constant Current Source

2013 ◽  
Vol 340 ◽  
pp. 933-936
Author(s):  
Dan Su ◽  
Zhi Hong Zhang ◽  
Jin Ping Zhao
Keyword(s):  
High Precision ◽  
Rocket Engine ◽  
Current Source ◽  
Engine Performance ◽  
Performance Testing ◽  
Constant Current ◽  
Output Current ◽  
Constant Current Source ◽  
New Type ◽  
Model Rocket Engine

In this paper, we designed a new type of high precision 1 μA constant current source after deeply studying the high precision precise dc constant current source. Compared with the traditional constant current source, in this paper we adopted complex amplifier added with floating power supply outside to design high precision dc constant current source which is for China's space use , its output current is 1 μA, resolution is 0.1 nA, accuracy is 0.5. This high precise dc constant current source is mainly used for new model rocket engine performance testing in aerospace, but also can be widely applied in different fields in need of precision measurement.

Design of Constant Current Source Based on Pulse Width Modulation

2013 ◽  
Vol 645 ◽  
pp. 418-421
Author(s):  
Li Hui Sun ◽  
Shu Jing Wang ◽  
Wei Chen
Keyword(s):  
High Precision ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Current Source ◽  
Constant Current ◽  
Output Current ◽  
Constant Current Source ◽  
Current Output ◽  
High Conversion Efficiency ◽  
Working Principle

Design of the constant current source based on pulse width modulation, and its working principle are discussed. The design can adjust the output current through pulse width modulation (PWM), and realize micro regulation by feedback output which stabilizes current output. The constant current source has some advantages of high precision, stable work, high conversion efficiency.

The Data Acquisition of High Speed A/D Conversion Based on STC12C5A32S2 SCM

2012 ◽  
Vol 182-183 ◽  
pp. 670-675
Author(s):  
Cheng Ying Wu ◽  
Zhan You Fan ◽  
Hong Jiao Ma ◽  
Zai Min He ◽  
Zhao Ming Wang
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Low Cost ◽  
High Accuracy ◽  
Single Chip ◽  
Digital Signals ◽  
Single Chip Microcomputer ◽  
Display Module ◽  
Analog Signals ◽  
Lcd Display

In order to achieve high-accuracy, high speed and low cost A/D conversion, a new design based on STC12C5A32S2 single-chip microcomputer (SCM) is given. Compared with the previous A/D conversion, the biggest advantage is that the paper combine software with hardware and it can adjust the speed of transformation through procedure.We don't need to modify circuit, just need to modify signals of input and procedures. So the flexibility of A/D conversion can be enhanced, also saved costs. The design mainly makes use of new function of STC12C5A32S2 SCM to realize conversion between analog signals and digital signals. In order that researchers can analyze and use the convention results, the design add a LCD display module. The paper primarily analyses the design of circuit and interface technology between the SCM and other chips. Also, the peculiar function of STC, the LCD display method of LMB202DDC and the flow of software are expounded in detail. The simulation result based on Proteus is given by the end of paper.

Design of High-Power Diode Laser Power Source by Single Chip

2014 ◽  
Vol 496-500 ◽  
pp. 1381-1384
Author(s):  
Juan Juan Li ◽  
Dong Ping Gi Yang ◽  
Gang Guo ◽  
Zheng Yan Li
Keyword(s):  
Diode Laser ◽  
Current Source ◽  
Power Source ◽  
Constant Current ◽  
Single Chip ◽  
Constant Current Source ◽  
Semiconductor Laser Diode ◽  
Power Diode ◽  
High Power Diode Laser ◽  
Driving Source

The digital Semiconductor Laser’s Driving Source is designed in this paper, in order to gain a constant current source, which the maximize output electric current is 40A; voltage is from 2V to 10V. Based on the requirement of very task, the part of driving and the part of constant temperature control, which is auxiliary designed, are made of the controller of semiconductor laser diode. As the result, the whole of designs ensure the diode laser to work stably.

Study on Hi-Power Precision Driving Power of Giant Magnetostrictive Actuator Based on Power Amplifiers

2011 ◽  
Vol 121-126 ◽  
pp. 2293-2298
Author(s):  
Yong Li ◽  
Cheng Rui Zhang ◽  
Xin Zhong Ding ◽  
Peng Zhai ◽  
Jing Wu
Keyword(s):  
High Efficiency ◽  
Current Source ◽  
Constant Current ◽  
Source Analysis ◽  
Output Current ◽  
Constant Current Source ◽  
Giant Magnetostrictive Material ◽  
Large Current ◽  
Magnetostrictive Actuator ◽  
Large Output

According to the driving characteristics of giant magnetostrictive material and the principle of constant current source analysis, the continuously adjustable driving power was developed by adopting the principle of constant current, selecting power operational amplifier, and using parallel flow technology to expand its output current, which had a large current, large output power, high efficiency and low power consumption. And through the actual test, the driving power of giant magnetostictive actuator reveals a good performance.

Sign in / Sign up

Export Citation Format

Share Document