Free Essay

Mr John

In: Social Issues

Submitted By john300
Words 934
Pages 4
-------------------------------------------------
ECET-402 Week 2 Lab – Acquiring Temperature & Signal Conditioning This lab actually consists of two separate but related labs. They will be presented in Parts A and B.

Objective:
The objective of this lab is to use an LM34 temperature sensor to acquire temperature and display it in an 8-bit binary number using LEDs and designing simple signal conditioning circuits using op-amps.

Parts Needed:

1. Multisim 8 (or higher) 2. LM34 Temperature Sensor 3. ADC0809 4. 8 LEDs 5. Wires, wire cutter, and wire stripper 6. Adjustable DC Power Supply 7. Function Generator and DMM

Part A – Temperature Sensor

We will use an LM34 temperature sensor IC to measure temperature in Fahrenheit degrees. We will then convert the analog output voltage of the sensor to an 8-bit digital signal using the Analog to Digital converter ADC0809. Finally we will use 8 LEDs to display an 8-bit binary number representing the temperature.
LM34:
The LM34 series are precision integrated-circuit temperature sensors. The output voltage is directly proportional to temperature in Fahrenheit degrees. Output voltage increases by 10 mV for every one degree Fahrenheit. For example, an output voltage of 720 mV (0.72 V) indicates a temperature of 72 F. LM34 has a range of -50 to +300° F and can be operated with a voltage supply of 5 to 30 VDC. It draws only 75 µA from its supply.
ADC0809:
This analog to digital converter was discussed in your digital courses. The output is an 8-bit digital signal.
Calibrating the ADC: The 8-bit output of ADC translates into 256 possible readings. We will select a reference of 5.12 volts for our system (instead of typical 5 volts). This number works well with 256 as indicated in the formula below: Analog in (from LM34) Digital out ---------------------------- = ---------------- Reference Voltage 256
For example, at 72 F, LM34 produces 720 mV (0.72 V). Using the formula given above: = 36 (Digital output), or in Binary: 00100100, which is half of 72.
Therefore: The Temperature = (Output Reading of ADC in Decimal) 2
Procedure:
Part A1 – A Simple Thermometer: You can use an LM34 temperature sensor, a power supply, and a DMM to measure the temperature. Wire up the circuit shown in Figure 1. Multiply the reading of the DMM by 100 (depending on the setting of your DMM). That will be the temperature in your room. Hold the LM34 sensor between your fingers and notice that the temperature will increase. Isn’t this cool?!

Figure 1
Part A2 – Wiring up the ADC0809:

1. Place ADC0809 on a breadboard and connect all wires as shown in Figure 3. Connect the output from the LM34 temperature sensor to Input (0), IN0 of ADC. The address A2A1A0 is set to 000 to select IN0.

2. ADC0809 requires a clock. Use a 20 kHz square-wave signal from the SYNC or TTL output of a function generator. Make sure to connect the ground of the function generator to the common ground of your system. If you would like to build your own clock circuit, an optional 20 kHz oscillator circuit is provided in Figure 4 below.

3. Connect the eight outputs of ADC0809 to eight LEDs. Place the 8 LEDs in a row next to each other to represent an 8-bit binary number as shown in Figure 2. Note the LSB and MSB LEDs. Connect the output pins of ADC0809 to Anodes of LEDs. The Cathodes are connected to the ground.

Figure 2

4. Make sure all wires are connected. Turn on the function generator and power supply. Adjust the power supply to 5.12 V DC for the reason described on page 1. Note the temperature reading on DMM as described in Part 1. Convert the 8-bit binary number displayed by the LEDs into decimal. This number should be half of the actual temperature. For example if the actual temperature is 72F, the LEDs should display 001001002, which is 36 in decimal.

Figure 3

5. Complete Table 1 on week 2 lab worksheet and answer the questions.

A simple Oscillator circuit

The circuit shown below is an optional oscillator circuit that could be used with ADC0809 analog to digital converter. It will produce a square wave of about 20 kHz.

-------------------------------------------------
Figure 4
-------------------------------------------------

-------------------------------------------------

Part B – Signal Conditioning Circuits

Procedure:

1. Design an operational amplifier circuit that can be used to produce an output that ranges from 0 to -5 V when the input goes from 0 to 100 mV. Build the circuit in Multisim and show the voltmeter reading for an input of 100m V. Paste a copy of the circuit from Multisim on the worksheet.

2. An operational amplifier circuit has an input resistance of 2 kΩ. Determine the feedback resistance needed for a voltage gain of +50. Design and build the circuit in Multisim and verify operation. Paste a copy of the circuit from Multisim on the worksheet.

3. Build the circuit shown in Figure 5 in Multisim. When Switch S is open (no load), voltage V1 is 5V. However when switch S is closed, load voltage VL will drop considerably and load current may not be sufficient for the load. Determine load current IL and voltage VL when switch S is closed.

Figure 5

IL = 454.525uA VL = 454.47mV

Enter the same values on the worksheet.

Next, build the circuit shown in Figure 6 in Multisim. Determine load current IL and voltage VL and describe the advantage of the voltage follower circuit.

Figure 6

IL = 4.651mA VL = 4.651V

Enter the same values on the worksheet.

Similar Documents

Premium Essay

Mr John

...THE REPRODUCTIVE SYSTEM JASMIN CAS TABLE OF CONTENTS Task 1- 1.1 | The male reproductive system | | 1.1 | The female reproductive system | | 1.2 | The function of Testosterone, Oestrogen, Progesterone | | 1.3 | The human menstrual cycle | | Task 2 – 2.1 | The diagram of the journey of the sperm cell for fertilization | | 2.1 | The diagram of the journey of egg cell for fertilization | | 2.2 | The process of fertilization and implantation | | 2.3 | Diagram of the early stages of a developing embryo | | 2.4 | The importance of the placenta | | 2.5 | The role of the following hormone during birth and lactation | | | Reference | | | | | | | | | | | | | | | | | THE REPRODUCTIVE SYSTEM Sexual Reproduction Like all living things, humans have to reproduce to ensure the survival of the species. Reproduction is the role of the reproductive system. The female reproductive system lies mainly inside the body, whereas much of the male system is outside the body. Each reproductive system produce special cells, the sex cells called gametes (sperms and eggs). From these gametes, the typical traits of the parents are conveyed to their brood. The genes are the one that stored the hereditary information on the......

Words: 6419 - Pages: 26

Free Essay

Mr John Smith

...Political Parties Short Questions 1. What is a political party? • A political party is a body that seeks to gain power in Parliament • Exercise government power by putting themselves up for election and gaining the support of the public. • They are grouped together by sharing common values and ideologies • Offer policies across a range of issues. • Examples include Labour and the Conservatives 2. Distinguish between a political party and a faction • A faction is a group of like-minded politicians, formed around a key leader or in support of a set of preferred policies, and operating within the House of Commons. E.g Cornerstone within the Conservatives • Political parties are more disciplined versions of factions • Have wider membership and organisation outside of parliament. 3. What is party government? • A system through which single parties are able to form governments • Parties have clear ideological convictions and develop rival programmes • Governing party is able to claim popular mandate and enjoys sufficient unity and cohesion to make government policies • Government is accountable to electorate through its mandate and opposition parties. E.g Labour won landslide victory n 1997, but in 2005 its majority was decreased 4. What is a two party system? • A two-party system is where there are only two major political parties dominating the system. E.g Labour and Conservatives • Only 2......

Words: 1253 - Pages: 6

Premium Essay

Mr John P

...Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health and Safety at Work Regulations 1999 This act ensur Management of Health...

Words: 312 - Pages: 2

Premium Essay

Mr John Kabali

...THE REPORT Expansion plan for selling Almarai’s products in the United Kingdom and eventually across Europe 1. Introduction This document is a report prepared to highlight the marketing plan to expand the markets of Almarai to the United Kingdom and eventually across Europe. This report also is intended to demonstrate factual statistics of the marketing position of Almarai in the Arab and how strategically the researcher purposely plan to go about it. According to the annual report 2014 of Almarai, the company’s mission is to provide high quality and nutritious food, beverage products that enrich our consumers’ lives every day. Almarai is the consumer’s preferred choice in the Arab World by providing superior products that best meet the market’s specific needs. 1.1 The essence of Almarai’s business comes from automated production facilities, high-volume logistics and regular distribution to the key retail outlets in the Kingdom and Gulf Cooperation Council (The Report: Emerging Saudi Arabia 2007). The report also mentioned that Almarai is the largest integrated dairy company in the world, with a well-recognised brand that was ranked number three (3) in the Forbes magazine. 1.2 Furthermore the overall strategic plan as mentioned in the 2014 annual report of Almarai stipulated that the focus of Almarai was continued improvement and growth. The implementation of Almarai’s strategic plan 2014 saw an accelerated growth in sales powered by the Dairy, Juice and Poultry......

Words: 352 - Pages: 2

Premium Essay

Mr John Kagai

...European Financial Management, Vol. 14, No. 1, 2007, 12–29 doi: 10.1111/j.1468-036X.2007.00415.x Behavioural Finance: A Review and Synthesis Avanidhar Subrahmanyam Anderson Graduate School of Management, University of California at Los Angeles, USA E-mail: subra@anderson.ucla.edu Abstract I provide a synthesis of the Behavioural finance literature over the past two decades. I review the literature in three parts, namely, (i) empirical and theoretical analyses of patterns in the cross-section of average stock returns, (ii) studies on trading activity, and (iii) research in corporate finance. Behavioural finance is an exciting new field because it presents a number of normative implications for both individual investors and CEOs. The papers reviewed here allow us to learn more about these specific implications. Keywords: behavioural finance, market efficiency, cross-section of stock returns JEL classifications: G00, G10, G11, G14, G31, G32, G34 1. Introduction The field of finance, until recently, had the following central paradigms: (i) portfolio allocation based on expected return and risk (ii) risk-based asset pricing models such as the CAPM and other similar frameworks, (iii) the pricing of contingent claims, and (iv) the Miller-Modigliani theorem and its augmentation by the theory of agency. These economic ideas were all derived from investor rationality. While these approaches revolutionised the study of finance and brought rigour into the field, many......

Words: 10556 - Pages: 43

Free Essay

Ssadas

...Contact Information for Teaching Staff at Thomas Knyvett College If you email a member of staff please allow 48 hours for a response. If it is an urgent matter please contact a member of the SLT or your son/daughter’s House Leader. Senior Leadership Team Mrs Miss Mr Mr Mr Miss Mrs Mrs Mrs Miss Miss Mr Mrs Mrs Ms Mr Mrs Mrs Mrs Miss Miss Miss Miss Mrs Mr Miss Mrs Miss Miss Mr Ms Ms Mrs Mrs Miss Mrs Mrs Miss Mr Mrs Mr Mrs Mrs Miss Miss Miss Ms Miss Miss Miss Mrs Janise Farrah Andrew Sheldon Chris Freya Claire Valerie Inma Seema Allison Adam Sian Kapila Theresa David Aimi Correen Jackie Emma Tanya Joann Alison Rachel Nick Abigail Wendy Lauren Isobel Andy Megan Mazie Carolyn Priscilla Preetpal Gurinder Sian Emily Steven Christine David Susan Vanessa Hayley Jean Azmari Linda Laura Nicole Hayley Tanya Marillat Thantrey Ward Snashall Bellamy Oliver Parsons O’Keeffe Alvarez Balrai Bates Belbin Bolsh Chalisgaonkar Chambers Chapman Curtis Danks Dillaway Edge Ellis Epps Fairclough Foley Fowler Frith Grantham Jankowski John Knott Lister Lloyd-Smith Manwaring Naicker Nashad Oberai Reeve Razzell Ratsakatika Reilly Retsinas Rowntree Russell Sculpher Semadeni Shikder Strachan Thomas Vernon Warren Zaheer JMa FTh AWa SSn CBe FOL CPa VOk IAL SBa ABa ABe SBo KCh TCh DCh ACs CDa JDi EEd TEl JEp AFa RFo NFo AFr WGr LJa IJo AKn MLi MSm CMa PNa PNd GOi SRv ERa DRa CRe SRe SRe VRu HSc JSe ASh LSt LTh NVe HWa TZa Head of School Deputy Head Assistant Head Assistant Head Cross Phase Assistant Head......

Words: 591 - Pages: 3

Premium Essay

Search for Miss Ssg (Script)

...members and the spirited PTA Officers. J & M: ladies and gentlemen, good evening! Welcome to the search for MISS SSG 2011-2012 and the induction ceremony of Tugdan National High School. M: as we commence this momentous event, may I request everybody to rise for a soul warming doxology to be lead by selected students. J: please remain standing for the Philippine National Anthem to be conducted by Mrs. Rachel Fesalbon. M: the world is proud of having its great leaders. From ancient times up to present, good leaders foster the rest of the world to stand firm, to dream big and to take the highest flight man could ever take.. good leaders prepare people to survive the realities of life !ladies and gentlemen, let us hear from our loving Madam Melicia Galicia for her opening remarks. : and at this moment, may I call on Mr. Christian Solidum to introduce the board of judges for tonight’s affair. J: thank you sir! And now let us all welcome our candidates in their production number. J: now, we have the induction ceremony of the newly elected SSG Officers who will be presented by Mr. Randy A. Musa, SSG Adviser and to be inducted by Hon. Herman Galicia, ABC President.. may I request all the officers to come on stage. M: folks, let us be entertained as the selected students set on stage in their modern dance presentation. : thank you guys!! J: ladies and gentlemen, a big round of applause to the candidates in their fashionista...

Words: 790 - Pages: 4

Free Essay

Turn of the Screw

...home after the previous governess died. Douglas begins to read from the written record, and the story shifts to the governess’s point of view as she narrates her strange experience. The governess begins her story with her first day at Bly, the country home, where she meets Flora and a maid named Mrs. Grose. The governess is nervous but feels relieved by Flora’s beauty and charm. The next day she receives a letter from her employer, which contains a letter from Miles’s headmaster saying that Miles cannot return to school. The letter does not specify what Miles has done to deserve expulsion, and, alarmed, the governess questions Mrs. Grose about it. Mrs. Grose admits that Miles has on occasion been bad, but only in the ways boys ought to be. The governess is reassured as she drives to meet Miles. One evening, as the governess strolls around the grounds, she sees a strange man in a tower of the house and exchanges an intense stare with him. She says nothing to Mrs. Grose. Later, she catches the same man glaring into the dining-room window, and she rushes outside to investigate. The man is gone, and the governess looks into the window from outside. Her image in the window frightens Mrs. Grose, who has just walked into the room....

Words: 1066 - Pages: 5

Free Essay

The Star

...character? To what extent is her final protest justified? How do the other characters portray themselves by their attitudes toward the ritual? Mrs. Tess Hutchinson stands out right from the start: she arrives at the lottery late. She explains to Mr. Summers that she was doing her dishes and forgot what day it was. The town treats her lateness lightly, but several people comment on it, “in voices just loud enough to be heard across the crowd, ‘Here comes your Missus, Hutchinson,’ and ‘ Bill, she made it after all.’” (Jackson 501). It is ironic that she is the one who wins the lottery, and is fated to be stoned. So Tess Hutchinson has already been noticed by people as one who is not entirely part of the group. Before the drawing she is friendly with the other women, pretending to be pleased to be present. The very moment that she sees is her family that draws the black dot, though, her egotism is evident. “You didn’t give him time enough to take any paper he wanted. I saw you. It wasn’t fair!” (Jackson 504). She continues to scream about the unfairness of the ritual up until her stoning. Mrs. Hutchinson knew the lottery was wrong, but she never did anything about it. She pretends as much as she could to enjoy it, when she truly hated it all along. Maybe Jackson is suggesting that the more hypocritical one is, the more of a target they are. Mrs. Hutchinson was clearly the target of her fears. I think sometimes we have no problem remarking on people’s adultery until it is......

Words: 548 - Pages: 3

Free Essay

Mr Ahmed

...May I beg that you will write at once to the mother of this unfortunate woman--to Mrs. Catherick--to ask for her testimony in support of the explanation which I have just offered to you?" I saw Miss Halcombe change colour, and look a little uneasy. Sir Percival's suggestion, politely as it was expressed, appeared to her, as it appeared to me, to point very delicately at the hesitation which her manner had betrayed a moment or two since. I hope, Sir Percival, you don't do me the injustice to suppose that I distrust you," she said quickly. "Certainly not, Miss Halcombe. I make my proposal purely as an act of attention to YOU. Will you excuse my obstinacy if I still venture to press it?" He walked to the writing-table as he spoke, drew a chair to it, and opened the paper case. "Let me beg you to write the note," he said, "as a favour to ME. It need not occupy you more than a few minutes. You have only to ask Mrs. Catherick two questions. First, if her daughter was placed in the Asylum with her knowledge and approval. Secondly, if the share I took in the matter was such as to merit the expression of her gratitude towards myself? Mr. Gilmore's mind is at ease on this unpleasant subject, and your mind is at ease—pray set my mind at ease also by writing the note." "You oblige me to grant your request, Sir Percival, when I would much rather refuse it." With those words Miss Halcombe rose from her place and went to the writing-table. Sir Percival thanked her, handed her a...

Words: 572 - Pages: 3

Premium Essay

The Virgin

...He went to where Miss Mijares sat, a tall, big man, walking with an economy of movement, graceful and light, a man who knew his body and used it well. He sat in the low chair worn decrepit by countless other interviewers and laid all ten fingerprints carefully on the edge of her desk. She pushed a sheet towards him, rolling a pencil along with it. While he read the question and wrote down his answers, she glanced at her watch and saw that it was ten. "I shall be coming back quickly," she said, speaking distinctly in the dialect (you were never sure about these people on their first visit, if they could speak English, or even write at all, the poor were always proud and to use the dialect with them was an act of charity), "you will wait for me." As she walked to the cafeteria, Miss Mijares thought how she could easily have said, Please wait for me, or will you wait for me? But years of working for the placement section had dulled the edges of her instinct for courtesy. She spoke now peremtorily, with an abruptness she knew annoyed the people about her. When she talked with the jobless across her desk, asking them the damning questions that completed their humiliation, watching pale tongues run over dry lips, dirt crusted handkerchiefs flutter in trembling hands, she was filled with an impatience she could not understand. Sign here, she had said thousands of times, pushing the familiar form across, her finger held to a line, feeling the impatience grow at sight of the man...

Words: 2581 - Pages: 11

Premium Essay

Missed Appt

...Article 86 of the Uniform Code Of Military Justice. This Article covers Point and Place of Duty. That means from PT formation to COB that is where you will be. What a lot of Soldiers do not understand that includes appointments made by them or someone else. We have appointment times, SP times, formation times and many other start times that dictate we will be there. If a Convoy has an SP time of fifteen hundred hours and the Soldiers decide to show up late because they did not feel like getting ready on time people could die. If they rolled out on time, they may have avoided the ambush or avoided the Vbid that hit them in the bottleneck. It sounds extreme but time management plays a critical role in the Army. When you make an appointment that spot has been reserved for you. That means if you have been given the last slot someone else is going to have to wait for another one to open up. This could be one day or one month. And because you missed it someone else is still going to have to wait when they could have had that spot and been there. If you are going to miss the appointment or cannot make it due to mission they do allow us to cancel the appointment with in twenty four hours. The Army allows us to make appointments for whatever we need. Be it for a medical appointment, house goods, CIF, Smoking Sensation or whatever we need these recourses are available to us. But when Soldiers start missing appointments theses systems start to become inefficient. What a lot of Soldiers......

Words: 354 - Pages: 2

Free Essay

The Virgin

...THE VIRGIN by Kerima Polotan Tuvera 1) He went to where Miss Mijares sat, a tall, big man, walking with an economy of movement, graceful and light, a man who knew his body and used it well. He sat in the low chair worn decrepit by countless other interviewers and laid all ten fingerprints carefully on the edge of her desk. She pushed a sheet towards him, rolling a pencil along with it. While he read the question and wrote down his answers, she glanced at her watch and saw that it was ten. "I shall be coming back quickly," she said, speaking distinctly in the dialect (you were never sure about these people on their first visit, if they could speak English, or even write at all, the poor were always proud and to use the dialect with them was an act of charity), "you will wait for me." As she walked to the cafeteria, Miss Mijares thought how she could easily have said, Please wait for me, or will you wait for me? But years of working for the placement section had dulled the edges of her instinct for courtesy. She spoke now peremtorily, with an abruptness she knew annoyed the people about her. When she talked with the jobless across her desk, asking them the damning questions that completed their humiliation, watching pale tongues run over dry lips, dirt crusted handkerchiefs flutter in trembling hands, she was filled with an impatience she could not understand. Sign here, she had said thousands of times, pushing the familiar form across, her finger held to a line,......

Words: 2588 - Pages: 11

Free Essay

Angelina Jolie

...was a member of the “Kissy girls”, whose job was to hunt boys down and kiss them till they screamed. Another hobby was to collect snakes and lizards. She even had a favourite lizard, called Vladimir. Later she was a student at Beverly Hills High School far from being beautiful. She wore braces, glasses and was painfully skinny. So the students teased her but they didn’t know that she had an impressive collection of knives. Her movie career At the age of seven she appeared in her first movie but her breakthrough came with Girl, Interrupted. It followed her big hit: her role in Tomb Raider, where she had to master a British accent. She had to become familiar with kick-boxing, street-fighting, yoga and ballet. In 2005 she released Mr. and Mrs. Smith, where she and Brad Pitt starred as a bored couple. Now she is married with Brad Pitt and although she is committed to motherhood she does charitable work...

Words: 269 - Pages: 2

Premium Essay

Angelina Jolie

...When most people see the name Angelina Jolie they only think of the talented actress, the significant other of Brad Pitt or the celebrity with the very diverse children but she is so much more than that. Since 2001 Jolie has been working alongside the United Nations High Commissioner for Refugees to bring awareness to the unfortunate situations of refugees from around the world. She has traveled to and volunteered in many third world countries such as; Sierra Leone, Cambodia, Costa Rica, Iraq and North Caucasus. In addition to this, she along with Brad Pitt founded the Jolie-Pitt foundation which is dedicated to eradicating extreme rural poverty, protecting natural resources and conserving wildlife. This foundation also donates to many other humanitarian groups, one being Doctors without Borders. In 2009 Angelina Jolie gave the opening speech for a World Refugee Day event being held at the National Geographic Society headquarters in Washington D.C. Throughout this speech Jolie concentrates not on the horrible conditions that refugees endure but on the spirit that they have from being in these situations. When speaking to millions of Americans she doesn’t rely on facts or statistics but instead she uses anecdotal evidence, visualization and pathos to get her point across. The purpose of this speech is not to persuade but to inform the people of America about the amazing people she has met while traveling to third world countries. Furthermore, she is trying to show people that...

Words: 268 - Pages: 2