The following is a project made by anonymous: INTRODUCTION The general purpose photoconductive cell is also known as LDR – light dependent resistor. It is a type of semiconductor and its conductivity changes with proportional change in the intensity of light. There are two common types of materials used to manufacture the photoconductive cells. They are Cadmium Sulphide (CdS) and Cadmium Selenide (CdSe). Extrinsic devices have impurities added‚ which have a ground state energy closer to the conduction
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Light Dependant Resistor (LDR) which senses the light actually like our eyes. It automatically switches OFF lights whenever the sunlight comes‚ visible to our eyes and activates the morning alarm. By using this system energy consumption is also reduced because nowadays the manually operated street lights are not switched off even the sunlight comes and also switched on earlier before sunset. In this project‚ no need of manual operation like ON time and OFF time setting. LDR and transistor are the
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Controlled Assessment ISA (PU 2.5) Light Dependent Resistors (Section 1) 1. Write down your hypothesis. Explain why you made this hypothesis. Hypothesis: When it is day there is more light hitting the LDR and so its resistance decreases and the light turns off. When it is night there is less light so the LDR has higher resistance and the light turns on. Explanation: When light shines on a Light Dependent Resistor‚ electrons are released and the current can get larger. So as the light intensity increases
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PROJECT REPORT ON AUTOMATIC ROOM LIGHT CONTROLLER WITH UNIDIRECTIONAL VISITOR COUNTER Submitted in partial satisfaction of the requirement for the degree of Bachelor of Technology (B-Tech.) in ELECTRONICS & COMMUNICATION ENGINEERING by 1. JAYAMALYA KUMAR CHAKRABORTY 2. SANDIPAN CHOUDHURY 3. BIPLAB KUMAR BERA 4. ABHIJIT KUMAR PAUL 5. JAYESH SINGH Under the guidance of Mr. Sudipta Chakraborty
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System Design. This project includes research‚ design and development of Arduino code and a suitable circuit in order to create a dusk indicator using a voltage comparator. Task 1 Activate a yard light represented by an LED using an LDR. The level of light dected by the LDR should be compared to the value currently set by a linear potentiometer. The ower can vary the potentiometer to vary how dark it needs to be before the yard light turns on. Task 2 Task 2 requires adding complexity by incorporating
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Long Distance Relationships – Modern Media LuvDaSun Res/110 August 18‚ 2010 Christopher Benedetti Abstract Long distance relationships are no longer a thing of the past. Modern technology has made it viable for partners to stay constantly in touch during a 24-hour period. A review of five peer-reviewed journals provides a variety of perspectives of long distance relationships. The articles focus on the positive and negative aspects of Long Distance Relationships. Weaknesses‚ strengths and differences
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technique. Relay uses as a automatic switchin this system. It releases the manual work atmost upto 100% . As soon as the sunlight goes under the visible region of our eyes this system automatically switches ON lights. Light Dependant Resistor (LDR )is a type of sensor which actually does this work and senses the light as our eyes does. As soon as the sunlight comes‚ visible to our eyes it automatically switches OFF lights . Such type of system is also usfull for reducing energy consumption
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11B30 INFANTRYMAN ADVANCED LDR 9 171-19D10 (HMMWV/M3) (R) 10 19D30 PH 2 CAVALRY SCOUT ADVANCED LDR 11 19K30 PH 2 ARMOR CREWMAN ADVANCED LDR 12 MANEUVER SR LDR PH 1 13 MANEUVER SR LDR PH 2 (11B40-INFANTRYMAN) 14 MANEUVER SR LDR PH 2 (11C40-INDIRECT FIRE) 15 MANEUVER SR LDR PH2 (19D40-CAVALRY SCOUT) 16 MANEUVER SR LDR PH 2 (19K40-ARMOR CREWMAN)
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Solar Tracking System Partha Das Purkaistha1‚ Harkishen Singh2‚ Arvind CV3 Faculty of Engineering‚ Architecture & Built Environment UCSI University‚ Kuala Lumpur‚ Malaysia 1suhag_2005@yahoo.com Abstract- Energy development is the ongoing effort to provide abundant and accessible energy‚ through knowledge‚ skills and constructions. Solar energy is rapidly advancing as an important means of renewable energy resource. More energy is produced by tracking the solar panel to remain aligned
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intensity of light in the room and if it is low then it will switch on the light. Our proposed system can able to minimize the energy consumed for lighting in a room and can able to provide it efficiently. Keywords: Lighting Control system‚ Energy saving‚ LDR‚ PIR sensor 1. INTRODUCTION: Power saving have became a necessary thing in our day to day life. Many conventional power saving methods such as using electrical devices which consumes very less energy or cutting off the entire power supply for a
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