International Journal of Current Engineering and Technology E-ISSN 2277 – 4106, P-ISSN 2347 – 5161 ©2017 INPRESSCO ® , All Rights Reserved Available at http://inpressco.com/category/ijcet Research Article 1700| International Journal of Current Engineering and Technology, Vol.7, No.5 (Sept/Oct 2017) Rationalization Energy Based on Automatic Street Lighting System Hasan Noaman Muslim^ * and Ameer H. Ali # ^Department of Electrical Engineering, University of Technology, Baghdad, Iraq # Najaf Technical Institute, Al-Furat Al-Awsat Technical University, 31001 Al-Najaf, Iraq Received 01 July 2017, Accepted 01 Sept 2017, Available online 02 Sept 2017, Vol.7, No.5 (Sept/Oct 2017) Abstract Conservative street lighting systems in zones with a low frequented passerby are lightened most of the nighttime without purpose. The result is that a large amount of energy is wasted uselessly. With the broad availability of electronics components like LDR that sense the light and control on it, powers conserving street lighting systems become reality. Therefore, the purpose of this invention is to provide a smart street lighting system which saves power of lighting street at night instead of loss it because the load of cars and walkers is few. This purpose is accomplished via use of controlling circuit which turns on a group of lamps at a specific time and after the time over, this group is turned off while another set of lights are turned on also with a specific time and so on. This work is focusing on developing automatic lighting system with using of light-dependent resistor (LDR) as a sensor of the sunshine and using a timer (NE555 IC). This system is low cost as it does not contain expensive sensors and it is also easy to implement as take very low space for installation. Keywords: Lighting system; Automatic; LDR; Timer; NE555; Control circuit; Sensor; Voltage regulator 1. Introduction 1 Lighting systems are an important facility of cities. A constant lightening is the best solution in busy areas. In the former case, a lot of people are walking around all night long, moving from their workplace or a shopping tour to restaurants, cinemas and parks. However, only a low number of residents and passersby using the streets during the night coming from their work moves to their homes. The temporal need for lighted streets is in relation to a continuous illumination of streets, often incredibly small. As energy consumption is an issue of increasing interest due to possibility of saving energy in public street lighting systems (R Műllner et al, 2011). The research focus followed in this work is to introduce an efficient street lamp switching system. 2. Proposed System This work is mainly focused on alternatings in street lighting control and a rationalization in the management of street lighting. This is complemented by an controlling circuit that controls on lighting the street at 24 hours and this is based on a sensor that senses the sunlight and it is called light dependent resistor (LDR). The controlling circuit consists of the following main components: (NE555 IC, light dependent resistor (LDR), Relay DS2Y–S–DC5V). The *Corresponding author’s ORCID ID: 0000-0001-9163-7207 principle operation of the proposed system is as follows: all day time, all lights in the street are turned off. At night time, all the lights of the street are switched automatically to illuminate the roads. But at midnight, there are a few flow of cars and walkers in the street and no need for full lighting, therefor, the control circuit will turn on a group of lights and turn off the other group. After a specific time, the first group will be turned off and will turn on the others and so on. The diagram of the system is as shown in Fig.1. Fig.1 Block diagram of the proposed system The main features of this work are:  System is applicable, fast response, reliable, and very efficient because the controlling on lighting is automatically without using any switches.