High-Power LED Constant Current Dimming Circuit Design

Abstract:

In this paper, an adjustable constant current circuit is designed by combining the digital potentiometer X9312 and the microcontroller 89C52. We first introduce the overall component and structure of the constant current dimming circuit which needs to be designed. Then, the hardware circuit design and the software design are discussed in detail. Based on the proposed design method, the manufacturing and the testing of the prototype machine are taken at last. The testing results are satisfactory, and meet the design requirement. The proposed design approach has won award in 2009 National Undergraduate Electronic Design Contest.

• Periodical: Applied Mechanics and Materials (Volumes 182-183)
• Pages: 411-415
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.182-183.411
• Online since: June 2012
• Authors: Jun Sun, Bo Xiang, Ping Zhou, Xiu Ying Wang
• Keywords: Constant Current Resource, Illumination, Light Emitting Diode (LED), Microcontroller, V/I Circuit

References

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