Indonesia Conference Directory

Advertising is utilized to provide information to the community in order to attract attention and move the desire to buy goods so as to increase the number of sales of goods or services. Advertising is generally made and placed in strategic places that can be seen both morning and night. To see billboards at night, a good light is necessary. This lighting uses floodlights that require considerable electrical power. Inverters with the DDS method can be utilized to reduce the electrical power requirements for illuminating billboards by reducing the voltage by changing the modulation index on the PWM generator. From the simulation results with a 220 Watt lamp load indicates the output waveform in the form of pure sinusoidal voltage. The output voltage is 223 volts and the current is 2.23 A at a frequency of 50 hz with a modulation index of 0.8. The condition of illumination light is brightly normal, while the 0.6 modulation index produces a 170 volt voltages and a current of 1.7 A with dimmed lighting. Electricity consumption of lighting using an inverter has decreased by 24%.