in the day time. Having observed these problems being encountered‚ this project will be developed to bring about the automation of the switching of lighting system using light depending resistor (LDR). The project is an electronic switch that is controlled (turned on and off) by the amount of light shining on the LDR. When light strikes the LDR‚ the switch opens (turns off); when the LDR is in darkness‚ the switch
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LDR Circuit Diagram: Here is the schematic for the circuit: Light Dependent Resistors Light Dependent Resistors (LDR) are also called photoresistors. They are made of high resistance semiconductor material. When light hits the device‚ the photons give electrons energy. This makes them jump into the conductive band and thereby conduct electricity. A photoresistor or light-dependent resistor (LDR) or photocell is a light-controlled variable resistor. The resistance of a photoresistor decreases
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ummary: Did you ever think that how the street lights automatically turn ON in the night and turn OFF automatically at morning? Is there any person who comes to ON/OFF these lights? The following circuit that described below which perform this job automatically. This circuit employed the output from an uncomplicated light/dark activated circuit and oblige a relay in its output which can be further attached to switch ON/OFF a street light and electrical application in a household also. Many of the
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• Why are the process of mitosis and meiosis both important to a living organism? Living organisms need cell division in order to grow and reproduce. Mitosis and meiosis are two types of cell division. Mitosis occurs in vegetation cells‚ while meiosis occurs in reproductive cells of animals. In mitosis‚ a parent cell divides into two identical daughter cells that are the same as the parent cell. Meiosis produces four daughter cells that contain half of the genetic information of the parent
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CHAPTER 4 HARDWARE DESCRIPTION 4.0 Arduino: The Arduino Uno is a microcontroller based on the ATmega328. It has 14 digital input/output pins in which 6 can be used as PWM‚ 6 analog inputs‚ a 16 MHz ceramic resonator‚ a USB port‚ a power jack‚ an ICSP header‚ and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.[11] The Uno differs from all preceding boards in
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Chemistry SCH4U-B Lesson 1 Key Questions 1. The development of MRI imaging technology is one useful spinoff of basic research into the structure of the atom. Research‚ however‚ is expensive. Many people argue that the high cost of research outweighs its potential benefits. Provide one argument for‚ and one argument against increasing current
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Traffic Light If I were to court a boy‚ I would be like the traffic light. I am color yellow‚ whispering take everything slowly but surely. I am color green‚ saying go when everything is going strong. I am color red‚ shouting stop when everything goes wrong. I see color yellow. I let myself stay firm to wait. I just keep waiting for my turn. I am in the middle. I stay neutral. I shall not go fast‚ but shall fire up and set. If I remain sluggish and dawdling‚ I will be left out. If I go too
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Mojave Desert Organisms * Planate (Vegetation) – Brittle Bush‚ California Juniper‚ Creosote Bush‚ Common Saltbush‚ Joshua Tree‚ Mojave Aster‚ and Triangle-leaf Bursage * Animalia (Animals) – Mammals include coyote‚ desert bighorn sheep‚ desert kit fox‚ spotted skunk‚ spotted bat‚ black-tailed jackrabbit‚ ground squirrels‚ kangaroo rat and white-footed mouse. Birds include eagles‚ hawks‚ owls‚ quail‚ roadrunners‚ finches‚ warblers and
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Today in education there are many individuals that need laws that are implemented under the IDEA (Individuals with Disabilities Education Act)‚ which is enforced by Public Law 94-142. This act implements certain plans that individuals with disabilities can use to help them with their special needs within a classroom. The Individualized Family Service Plan (IFSP)‚ the Individualized Education Plan (IEP) and the 504 plan all have many some things in common. However there are also many differences that
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• To survive‚ what gas do we need to breathe in? Oxygen • Where is this gas produced? In plants Gizmo Warm-up During photosynthesis‚ plants use the energy of light to produce glucose (C6H12O6) from carbon dioxide (CO2)‚ and water (H2O). Glucose is a simple sugar that plants use for energy and as a building block for larger molecules. A by-product of photosynthesis is oxygen. Plants use some of the oxygen they produce‚ but most of it is released. In the Photosynthesis Lab Gizmo™‚
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