Abstract
Lighting is a factor to get a safe and comfortable environment. Good lighting allows one to see objects that are done clearly, and can give a refreshing view. Conversely, if the room has poor lighting can cause eye fatigue, therefore it is necessary to control the intensity of light-based microcontroller to regulate the lighting of a room automatically. his research was made by designing a lighting model using a dimmer circuit based on ATMega328 microcontroller, LDR sensor (Light Dependent Resistor) and Bluetooth HC-06. The working principle of the LDR sensor is receiving light from the outside which causes changes in the input voltage level to the microcontroller while the Bluetooth HC-06 works by connecting a Bluetooth device with a smartphone that has installed the PWM Light Control application. which is then processed by microcontroller output in the form of pulse voltage (PWM) in the dimmer circuit to adjust the dim and bright lights. Results for electricity voltage (Volt), Electricity (Ampere), Light level (Lux) and electrical power used. At each increase from 0-255 PWM which is channeled to the dimmer circuit, the power is 0-13,0357 watts, comparable to before using a circuit of around 13,5036 watts with a percentage of 1. 7% with a 15-Watt lamp, the light conditions are stable in brightness. The distance of control of this tool reaches 26. 15 m with 1 barrier wall and still works with 3 barrier walls with a distance of 21. 45 m. So that the use of electric power and light can be adjusted to the needs.
Highlights
With the development of technology that is developing encouraging operational work done by humans can be facilitated with adequate technology so as to facilitate its use
The design needed to make a dimmer circuit is a Dimmer circuit that can be used as a regulator of light intensity
The main component of a dimmer circuit is an optocoupler and MOSFET that can control AC voltage so that it directly impacts the light. This circuit is made to be controlled through Pulse Width Modulated (PWM) generated from Arduino or other pulse generator circuits
Summary
With the development of technology that is developing encouraging operational work done by humans can be facilitated with adequate technology so as to facilitate its use. This is characterized by the presence of various equipment that was created and can be operated and used in an automated manner. One of the automated technologies that is currently developing is the microcontroller, currently many microcontrollers are applied to instruments related to everyday human life. Along with the development of technology, the need for electricity is increasing. For this reason, there is a need to reduce unnecessary electricity consumption
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