Title :
A simple design and implementation of LED director with solar-power
Author :
Cheng, Chien-Lung ; Yeh, Jirn-Chwen ; Chern, Shyi-Ching ; Chen, Zheng-Jun
Author_Institution :
Dept. of Electr. Eng., Nat. Formosa Univ., Huwei, Taiwan
Abstract :
In this paper, a LED director based on solar-power is developed for education purpose. The solar energy is converted to fixed output voltage to charge battery and drive LED matrix. A boost converter based on PWM controller AIC1630, is used to step up solar voltage. The sign pattern of LED is set and controlled by chip EM78M447SB. Two charging modes, including constant current mode and fixed voltage mode, are applied to charge of battery. Therefore, a shorter charging time and good life-time is reachable. The LED director is useful and convenient by experiment.
Keywords :
PWM power convertors; power control; solar power; AIC1630; EM78M447SB; LED director; PWM controller; battery charge; boost converter; solar energy; solar voltage; solar-power; Batteries; Control systems; Inductance; Light emitting diodes; Matrix converters; Photoelectricity; Photovoltaic cells; Silicon; Solar energy; Voltage; Boost Converter; LED Director;
Conference_Titel :
Industrial Electronics, 2009. ISIE 2009. IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-4347-5
Electronic_ISBN :
978-1-4244-4349-9
DOI :
10.1109/ISIE.2009.5218892
