Title :
Design of digital controlled-constant current source based on AVR
Author_Institution :
Sch. of Electron. & Inf. Eng., Xianning Univ., Xianning, China
Abstract :
This article describes a design of Digital Control of DC current source based on AVR microcontroller. The system uses the Atmega8 as the main chip and consists of keyboard input, LCD display, I / V conversion, power amplification and other modules. It uses a negative feedback closed-loop control. The MCU can compare real-time the preset value with the measuring results, and adjust the settings, in order to advance the output precision of the current. The design can achieve the functions of different measurement ranges, adjustable output current, exact step and very small current waviness. It also can display the output preset value and the measuring results by LED at the same.
Keywords :
closed loop systems; constant current sources; control system synthesis; digital control; feedback; keyboards; liquid crystal displays; microcontrollers; AVR microcontroller; Atmega8; DC current source; I-V conversion; LCD display; LED; MCU; digital controlled constant current source; negative feedback closed loop control; output precision; power amplification; Aerospace control; Current measurement; Digital control; Instruments; Monolithic integrated circuits; Pulse width modulation; Semiconductor device measurement; Atmega 8; Closed loop control; Current generator; Digital control;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on
Conference_Location :
XianNing
Print_ISBN :
978-1-61284-458-9
DOI :
10.1109/CECNET.2011.5768555
