Sensor Project Essay Example for Free

Sensor Project Essay I have decided to measure the temperature of a greenhouse using a thermistor in a potential divider circuit, and then when the temperature gets too cold, the relay will activate and turn on a heater. A thermistor is a temperature sensor in which its resistance will increase or decrease with temperature change depending on what type of resistor. An alternative for this experiment could have been measuring light levels in a greenhouse using an LDR. A light sensor in a green house could tell you when and where in the greenhouse the most intense sunlight is, which you could you use to aid your growing skills. I decided to design a temperature sensor for a greenhouse using a thermistor, as temperature can be critical in growing plants especially if it gets too hot or too cold. As my thermistor is an NTC this means that as temperature decreases its resistance increases, and when temperature increases its resistance decreases. Plan: Circuit Explanation The water is boiled until it reaches a temperature of just above 90i Celsius. The thermistor is inserted into the hot water and the voltage across it is measured for a temperature of 90i. The varying voltage across the thermistor is measured as the temperature falls at 10-degree intervals. The experiment is repeated and a second set of readings obtained. An average set of readings is obtained and a voltage-temperature conversion graph is plotted. Then test the sensor by attaching the amplifier and relay. Materials/Apparatus Needed: Thermometer, Thermistor, Beaker, Electric kettle, Power supply, Multimeter, Variable resistor, Amplifier, Relay, Leads. These pictures show me testing the thermistor (left), and testing the amplifier to see at what voltage it activates (right). Variables The volume of water used for this experiment was kept at 250cmi The experiment was completed over one day, and on the day, the temperature in the physics laboratory where the experiment took place was 19i C. Results Calculation of R1: I want my amplifier to activate at 10i C, for the heater to come on. The amplifier turns on at 1. 93V, as I have tested, and because the voltage is proportional to the resistance, I will work out which resister to use using the equation below. (At 10i C the thermistors resistance is 124. 8? )

Free Essays: Faith and the Other Works of Emily Dickinson :: Biography Biographies Essays

Faith and the Other Works of Emily Dickinson Many of Emily Dickinson's poems are short. Similar to Faith, they are full of delightful surprises and thought provoking twists. Faith is more provocative than usual. The words are plain. Literally, it says that the gentlemen only believe what he can see; for those are hard to see by the naked eye, they rely on science which is symbolized by "Microscopes." "Faith" is a fine invention when Gentlemen can see -- But Microscopes are prudent In an Emergency. -- by Emily Dickinson As in all poems, the true meaning is always deeper than the meaning of the words. I try to grasp the poet's intention by study the images conjured by the words. Every time I read this poem, I see a picture of a girl in her cheerful voice reading the words. The voice reminds me of her own words -- "The old -- old sophistries of June." I carefully listen to every word and wrestle with every sound, but they all puzzle me. Is the "faith" an invention of man? Someone must have invented the word "faith" and associated a meaning to it. The Webster dictionary defines "faith" as a "firm belief in something for which there is no proof." Did man invent the belief? Did he invent the objects of his belief? ... I have many questions, where to look for answers? Following Dr. Johnson's suggestion, I seek hints from other poems by Emily Dickinson. She lived in a religious family according to her own letter to Thomas Higginson, the editor of her work, but she is not a religious person. In one poem, she wrote: Some keep the Sabbath going to Church - I keep it, staying at Home - With a Bobolink for a Chorister - And a Orchard, for a Dome. In this poem, she compares nature with church. The bobolink and the orchard are her deities. Considering this information, I image there is a little bit of smirk in the girl's voice. Maybe she is laughing at her church-goer parents as many teenagers do. When I was that age, I used to think that going to church is mere formality and took notice of all the inconsistencies between my parents' words and their actions. Each time when I see an inconsistency, I say to myself "Talking about faith, the only thing they believe is what is in front of their eye.

Time Management and Transition

Independent decisions and is financially independent. The Journey from adolescence to adulthood can be an exciting adventure but it may also be extremely stressful. Planning strategies to deal with potential obstacles will help with the transition from adolescence to adulthood. Planning for your transition from school to career, family home to own home, family to community, or others care to self care will ensure that you will have a successful transition from adolescence to adulthood.The transition from school to career can be extremely stressful for students, particularly if the student still hasn't chosen a career in which they want to pursue. It is imperative that you make wise decisions in your adolescence, as their outcome can have a major impact on your life when you become an adult. Life skills such as time management and organization are key elements in preparing for a successful and non-stressful transition from adolescence to adulthood.Students with impeccable time managem ent skills will ensure that they are never late for school and for their Job and will always avoid procrastination at all costs. Ways in which students can improve their time management skills are to stop procrastinating, prepare lists such as â€Å"To- Do Lists†, and delegate responsibilities. The transition from family home to own home is dependent after the successful transition from school to career has occurred.This is an exciting moment in your life where you finally get to live away from home. For some people, this transition may be stressful as they're not used to being away from home, whereas others find that this transition to be quite enjoyable as theyre no longer living at home in their parents' house. This transition provides a feeling of great independence and interdependence. Imperative life skills that must be learned for this transition to be successful and non-stressful are good..

Swot Analysis Biometrics Biometric Fingerprint And Voice...

Abstract— Biometrics is the technique of using exclusive, non moveable, physical characteristics, such as fingerprints, to earn entry for personal identification. Since After the invention of the exclusive technology it has been being used in safety systems and authentication. Presently, security fields have three different types of authentication, they are: Something we know: a password, PIN, or piece of personal information something we have: a card key, smart card, or token and something we are: a Biometric based computer networks and its access in the internet are the techniques which are known little and very rarely implemented. This paper deals with the accessibility of biometrics in a practical application like polling of votes-‘e-voting’ using a physical entity (finger print, Voice Recognition) through computer network. Keywords— E-voting, Biometrics Fingerprint Voice Recognition, Authentication, MFCC algorithm. I. INTRODUCTION Here we are simulating the large-scale voting system from anywhere. That means that the user can access to give vote from, them home PC, internet cafe, office PC. For this we are connecting the user PC with the voting server via Local Area Network (LAN). The user has to log on to the voting server via own PC. They will be asked for the authentication of identity. The user can then authenticate them ID using either Voice recognition or Fingerprint recognition Or Both. The main concept of the project is to make possible the voter to