automated switching system for smart lights.

This projectpresents the design and implementation of an automatedand remote switching for smart lights, its objective being to useambient light to control the status of a lighting system and varying thelighting colour to suit a particular occasion-adaptive adjustment.

The report also details the design of remote lightswitching that incorporates lighting control via a smartphone.

The lighting system in this context could be situated in anoffice, home or factory, but the adaptive adjustment specification would mostappropriately suit home lighting system. The lights will be able toautomatically turn ON or OFF depending on ambient lighting level.The individual as well selects the desired colour of the light and brightnesslevel which is then relayed to a microcontroller that sets the preferredbrightness level by determining the appropriate duty cycle of the PWMsignal.

This report presents the design and implementation of an automatedand remote switching for smart lights, its objective being to useambient light to control the status of a lighting system and varying thelighting colour to suit a particular occasion-adaptive adjustment.

The report also details the design of remote lightswitching that incorporates lighting control via a smartphone.

The lighting system in this context could be situated in anoffice, home or factory, but the adaptive adjustment specification would mostappropriately suit home lighting system. The lights will be able toautomatically turn ON or OFF depending on ambient lighting level.The individual as well selects the desired colour of the light and brightnesslevel which is then relayed to a microcontroller that sets the preferredbrightness level by determining the appropriate duty cycle of the PWMsignal.

A light sensor unit will be set at strategic points of thearea to be illuminated e.g. next to the window.

Thesesensors will transmit to a microcontroller which will control ceiling-mountedLEDs. The feedback from the sensors will keep the desired colour and intensityat the area of interest, so that if there is sufficient sunlight, the LEDs neednot consume as much power. Occupancysensors will be mounted near the light and will only turn on the light when aperson is detected in the area. We will demonstrate the device with two lightsto show that it is adaptable to more fixtures

Logical control is the toggling ON and OFF of a lightingsystem for example using a standard switch. This type of control is the mostcommon because they allow more certainty and simplify control. Moreover, theuse is stuck between two light statuses.

Brightness control is concerned with varying the brightnessof the lamps to achieve the desired light level. It can be viewed as continuouscontrol because the brightness can be adjusted to suitable levels. It is alsomore intuitive albeit complex in design.

Colour control is concerned with varying the colour of thelamps to achieve the desired light colour. As discussed in the problemstatement, colour control of lighting systems is an important area to humanliving not just for functional and architectural lighting purposes but also forphysiological purposes; the mood in human beings has been shown to be affectedby the colour of the light in their surroundings.

Energy Management Systems, Home Automation and SmartLighting are modern technology concepts aimed at lighting control that are fastgetting popular. Their overall objective is energy efficiency and automatedcontrol of electrical systems.

Lighting is often the largest consumer of electricity in abuilding. In a naturally ventilated building, lighting may account for 40% ormore of the total electricity cost. The overall lighting design together withthe choice of lamps and fittings pays the major part in determining the energycost of the lighting system; further reductions can be achieved by use of aneffective lighting control system.

Buildingregulations require the use of efficient light sources and specificallyrequires the use of controls. Moreover, lighting conditions produced by thecontrol system must at all times provide satisfactory illumination for theoccupant of the building