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C8051F020-based automatic monitoring and control LED energy-efficient lighting system design

In Electronic Infomation Category: C | on April 23,2011

Abstract: A novel based on the ambient light intensity and REF02HP datasheet and temperature changes in infrared automatic switches, adjust the brightness of the LED lighting system design. C8051F020 microcontroller for system control by the core design of silicon photovoltaic cells and REF02HP price and integrated operational amplifier consisting of light intensity sensor, used as a pyroelectric infrared wireless sensor module, the use of DS18B20 for the temperature sensor, also used to achieve a working LCD information display. Experimental results show that the system power at 2 170 lx of light or temperature higher than 82.5 can automatically shutdown, when the light intensity is less than 1 040 lx or when temperature is below 49.3 automatically open; when the light intensity at 1 000 ~ 2 000 lx changes, LED brightness ca...

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