Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A study on the microcontroller-based color control circuit for high brightness LEDs

마이크로컨트롤러를 이용한 고휘도 LED의 광색가변 회로에 관한 연구

  • Yu, Yong-Su (Dept. of Electrical Engineering, Chonnam National University) ;
  • Song, Sang-Bin (Dept. of Electrical Engineering, Chonnam National University) ;
  • Gwark, Jae-Young (Dept. of Electrical Engineering, Chonnam National University) ;
  • Yeo, In-Seon (Dept. of Electrical Engineering, Chonnam National University)
  • Published : 2000.07.17
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Abstract

This paper presents a microcontroller-based control circuit for color variation of high brightness RGB LEDs in $8{\times}8$ matrix array. The control circuit is comprised of an AT89C52 chip, D Flip-flops, and transistors for switching, and is used to adjust the number of LEDs operated for color variation. For a stable operation, it is required that the input current to each LED should be maintained to a normal value irrespective of the number of LEDs operated.

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