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http://dx.doi.org/10.5762/KAIS.2012.13.10.4740

Implementation of a LED light control module using Zigbee  

Jang, Young-Ho (Dept. of Electronic Engineering, Wonkwang University)
Kim, Hwan-Yong (Dept. of Electronic Engineering, Wonkwang University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.13, no.10, 2012 , pp. 4740-4744 More about this Journal
Abstract
The purpose of this paper was to make a LED light control module using Zigbee. The module was made so that brightness of the LED light changes according to the ambient brightness. A 8-bit microcontroller was used to implement the module to enable LED dimming and wireless light intensity measurement. Using the proposed method, power consumption can be improved by up to 48% on average, with 3.4-0.4W changes in power. The measured ambient light intensity values are converted from analog to digital and outputted as a PWM waveform. According to the output waveform and changes in the current outputted from the LED driver, the brightness of the LED light is controlled. Also, Zigbee with close-range wireless communication capabilities was used to enable wireless transmission of light intensity measurements.
Keywords
LED; Zigbee; Dimming; PWM; LED Driver;
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