Intelligent lighting control with LEDS for smart home

This paper presents intelligent lighting control system for smart home. The AC power source is converted down with an AC to DC switching power supply, then is delivered to some LEDs with an LED driver. This paper proposes two methods of lighting control. In the manual control method, LED is controlled with a PWM signal. In fact, according to the user command, it generates the proper duty cycle in a PWM signal. In the automatic control method, the LED is controlled with a signal generated by the PID control algorithm. In this method, the photocell measures the ambient light level and with reference to the input command by the user, proper PWM signal is generated. Circuit schematics and the implementation details are presented. A laboratory prototype is also designed and tested to verify the feasibility, and the experimental results are demonstrated.