Energy-efficient light driver controller using complex programmable logic

In pursuit of energy-efficient technology, lighting system has been one of the major concerns of global warming because of high power consumption. Therefore, this study attempted to investigate and design a new mechanism for reducing energy consumption by targeting the indoor lighting system. This study has been carried out in three stages: design, simulation, and implementation. The complex programmable logic device (CPLD) Altera Max EPM7128SLC84-15N has been used as a target device for controlling the luminance and power consumption of LED at the design stage. Several ranges of duty cycle starting from 6% to 93% have been designed, simulated, and tested on CPLD to determine the suitable luminance range at the optimal power consumption for indoor lighting. Altera Quartus II version 11.1 has been used to construct, compile, and simulate the proposed design. Meanwhile, Arduino Uno R3 has been used as an interface for the sensor at the implementation stage. The system has been successfully developed and tested using several ranges of input variables. Evidently, the optimal luminance is influenced by the range of duty cycle and the numbers of the LED bulb. Hence, the proposed system using 15 LEDs at 73% duty cycle produces 480 lx, which approaches the normal office illumination at 500 lx. Therefore, the proposed system is capable of reducing 27% power consumption to produce optimal standard indoor illumination.