full frame. As I said earlier‚ full frame lenses have no problem adjusting to cropped sensors because the image circle is big anyway. On the other hand‚ if you were to put a cropped lens on a full frame sensor the image circle would be too small to cover the entire sensor and‚ as a result‚ you would get blackened vignette edges around your picture. This is why cropped lenses do not work with full frame sensors. Crop lenses‚ have less glass inside and are generally easier to carry around because
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can be crucial. Size and shape of the sensor is also an essential factor. Comfort is important when taking a radiograph. The sensor offers smooth‚ rounded corners that will not penetrate into the patient’s gingiva causing more discomfort. Some disadvantages of the sensor are related to the sensor maintenance its self. One is cable failure. There are multiple wires located in the long cable that connect the receptor to the computer. Throughout the day‚ the sensor is positioned multiple different positions
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A Region B Region C Region D Region E The cart remains still for 2.6 seconds 0.7 meters away from the sensor. Net force equals zero. All three graphs show the cart is stationary with a flat line across the 0.7 line. Acceleration graph begins sloping negatively once the force of hand is applied. After 2.6 seconds the cart is pushed towards the sensor until it reaches 0.2 meters. At this point the power of fan becomes greater than the power of the hand and the cart changes
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controller – ARM cortex. Brief Description: This project consists of the following blocks – sensors‚ amplifier‚ ARM core‚ GSM and GPS modem. The vibration sensor senses the the vibration of the in the course of occurrence of an accident. We use an shock sensor to sense the vibration. The distance measurement sensor senses the distance of the vehicle from its neighbor. The output from the sensors are amplified by using an instrumentation amplifier and fed to the ARM core. The controller is
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Advanced Railway Gate Control & Track Switching system 2013 A THESIS SUBMITTED TO THE DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING Specialization in Industrial Control & Instrumentation Engineering In fulfillment for the award of the degree Of BACHELOR OF ENGINEERING In Department of Electrical & Computer Engineering ETHIOPIAN INSTITUTE OF TECHNOLOGY – MEKELLE EIT-M MEKELLE‚ ETHIOPIA JUNE‚ 2013 Mekelle University Page i Advanced Railway Gate Control & Track Switching
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basic concepts behind different sensor technologies and apply it to the line detecting circuit of the line following mobile robot. 3. To be able to establish the relationship between the electrical and mechanical components of the line following mobile robot. 4. To be able to see a functional real time application of logic gates and related circuitry. II. ELECTRONIC DESIGN AND INVENTORY A. Schematic and Board Design Figure 1. Schematic of the Sensor Circuit Note: The photo transistor
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The aim of this project is to design and build a prototype of an automated parking system which will show the number of parking spaces left inside the parking lot. It will have a pre installed number of maximum cars that can be parked. An infra red sensor will count the entry and exit of each car and open the barricade for the entry and exit. The entry and exit system can how ever be chosen. A display on the monitor outside the parking lot will show how many cars can still be parking inside the
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a contrasting background‚ usually a black line on a white surface or a white line on a black surface. Usually the line follower robot works on a closed loop feedback algorithm where the feedback from the line sensor is used by the controller for correcting the path of the robot. The sensors are usually LED/LDR‚ LED/Photodiode or LED/Phototransistor pairs and the controller is an electronic circuit which executes the desired feedback algorithm. Gear motors are used for driving the robotic wheels.
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PIEZOELECTRICITY AND APPLICATIONS Piezoelectricity is the ability of some materials such as crystals and certain ceramics‚ to generate an electric potential in response to applied mechanical stress or heat. If the piezo crystals are not short-circuited‚ the applied charge induces a voltage across the material. The word Piezo is derived from the Greek “Piezein”‚ which means to squeeze or press. The piezo material exhibits both “Direct piezo electric effect” as well as ‘Converse piezo electric
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ANALYTICAL BIOCHEMISTRY Analytical Biochemistry 363 (2007) 1–11 www.elsevier.com/locate/yabio Review Ultrasensitive biochemical sensors based on microcantilevers of atomic force microscope Chengyin Wang b a‚b ‚ Deyan Wang a‚ Yindao Mao a‚ Xiaoya Hu a‚b‚* a College of Chemistry and Chemical Engineering‚ Yangzhou University‚ Yangzhou 225002‚ China Key Laboratory of Environmental Engineering and Monitoring of Jiangsu Province‚ Yangzhou‚ China Available online 4 January 2007
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