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1 Oswego Update Project A Graduate Research Project Updating Course Outlines in Technology Education June 2004 “Electronics/Electricity” In collaboration with: Developer: Mr. Aaron Gross, Graduate Research, SUNY – Oswego, [email protected] Project Directors: Dr. William Waite, Professor, SUNY-Oswego, [email protected] Mr. Eric Suhr, Laisson, New York State Education Department, [email protected] Content Consultants: Mr. Dan Drogo, Liverpool Central School District, [email protected] Mr. Paul Mizer, Baldwinsville Central School District, [email protected] Original Writing Team (1985): Mr. Howard Sasson, Team Leader, City College of New York Mr. Robert Caswell, Liverpool, High School Mr. James Goldstine, Hauppauge High School Mr. Bruce Kaiser, Liverpool High School Mr. George Legg, Ossining High School Mr. Joesph Sarubbi, Hudson Valley Community College Ms. Sandra P. Sommer, Wantagh High School Digitally available at www.oswego.edu/~waite 2 Forward The “Oswego Update Project” is a collaboration between SUNY Oswego and the NYS Education Department to refresh and modernize existing Technology Education course outlines. New York State Learning Standards will be identified and organized. The original work was a NYSED initiative during the transformation from Industrial Arts to Technology Education in the 1980s. These courses have proven to be very popular and most durable for the profession. In fact, many have been used as course models in other states. Hundreds of sections are offered in New York state each year, according to the Basic Educational Data System (BEDS). However, the objectives need to be revisited with a current eye, successful teaching strategies need to be surveyed in the field, bibliographies should be updated, and Internet resources added, as they were unavailable during the original project. It is hoped that this graduate-level research endeavor will accomplish the following: provide a solid graduate research project for the developers involved (learning by doing) involve known, successful teachers as consultants to the process through a common interview template honor the work and dedication of the original writing teams refresh course objectives and teaching strategies forge a more uniform format between and among course outlines update the bibliography of each course to reflect the last ten years of literature review include Internet resources both useful as general professional tools, and as specific content enhancement develop an index showing how NYS M/S/T standards are accomplished for each course objective The result will be an enhancement for graduate students at SUNY-Oswego, NYSED implementation goals, and Technology Education teachers in New York state. Course outlines will be digitally reproduced and made available through appropriate Internet and electronic media. Dr. William Waite, Professor SUNY Oswego, Dept. of Technology School of Education 3 Overview of the Course Course Description As we are in the middle of the information age, everybody is in contact daily with a vast majority of electrical devices from computers to cell phones. A basic understanding of electrical and electronics theory and application will enhance the ability of students to manage new technologies as they emerge. This course gives students the opportunity to explore the field of electronics and electricity and what careers are available. Students will be able to apply the basic elements common to all technological systems – input, comparison, adjustment, process, control, output, and feedback through experimentation and problem-solving instruction. Students will understand the basics behind everyday electronic devices. This is not a course where any prior knowledge of electronics is necessary. Course Goals, Skills, Knowledge, and Behaviors to be Developed Students will be able to: 1. Identify low voltage and line voltage devices and circuits in the home and be aware of their applications in other systems. 2. Interpret the extent of electrical technologies and what kind of effect they have on other technologies. 3. Properly and safely use the tools and equipment found in the electronics laboratory. 4. Read and interpret graphical representations of electrical components, devices, and circuits. 5. Assemble and fabricate simple electrical and electronic circuits, using common methods of breadboarding or circuit board fabrication. 6. Identify the passive and active components studied by matching the real component to its schematic symbol and labeling its unit of measurement. 7. Interpret schematic diagrams. 8. Discuss how the advancement of electronics technology has impacted one’s life and the environment. Content Outline Module 1.0: Introduction to Electricity with Low Voltage Applications 1.1 Electrical Technologies 1.1.1 Electrical versus Electronic 1.1.2 Technological Systems Applications 1.1.2.1 Power and energy 1.1.2.2 Manufacturing 1.1.2.3 Construction 1.1.2.4 Communication (including fiber optics) 1.1.2.5 Transportation 1.1.2.6 Agriculture 1.1.2.7 Aerospace/military 4 1.1.3 Home Applications 1.1.3.1 Generation and distribution (heat, light, etc.) 1.1.3.2 Major appliances 1.1.3.3 Communication/entertainment 1.1.3.4 Automotive 1.1.3.5 Personal computers 1.1.3.6 Health and medical 1.2.0 Safety Education 1.2.1 Safety Practices 1.2.1.1 Rules and regulations 1.2.1.2 Tools, machines, and equipment 1.2.2 Electrical Safety 1.2.2.1 Home environment 1.2.2.2 Laboratory environment 1.3.0 Electrical Construction and Fabrication 1.3.1 Tools and Hardware 1.3.1.1 Electrical hand tools 1.3.1.2 Wire selection and preparation 1.3.1.3 Connectors – temporary/pressure 1.3.2 Electrical Diagrams 1.3.2.1 Bill of materials 1.3.2.2 Graphic symbols 1.3.2.3 Schematics 1.3.2.4 Wiring/pictorials CAD 1.3.3 Fabrication and/or Breadboarding 1.3.3.1 Drilling 1.3.3.2 Mounting 1.3.3.3 Assembly 1.3.3.4 Modular component/circuit assembly 1.3.4 Soldering – Desoldering 1.3.4.1 Preparation and safety 1.3.4.2 Tools and materials 1.3.4.3 Technology 1.4.0 Electrical Theory 1.4.1 Electrical Classification of Materials 1.4.1.1 Conductors 1.4.1.2 Insulators 1.4.1.3 Semiconductors 1.4.1.4 Electron theory 1.4.2 Electrical Current 1.4.2.1 Movement of particles 1.4.2.2 Direct and alternating 5 1.4.3 Electrical Circuit 1.4.3.1 Source 1.4.3.2 Load 1.4.3.3 Conductors 1.4.3.4 Control – switches 1.5.0 Low Voltage Systems 1.5.1 Simple Series Circuits 1.5.1.1 Observing voltage and current 1.5.1.2 Applications 1.5.2 Simple Parallel Circuits 1.5.2.1 Observing voltage and current 1.5.2.2 Applications 1.5.3 Basic Servicing Techniques 1.5.3.1 Continuity/voltage tests 1.5.3.2 Battery testing and charging 1.5.3.3 Installing telephone jacks/plugs 1.5.4 Applications 1.5.4.1 Battery-powered systems 1.5.4.1.1 Automotive 1.5.4.1.2 Entertainment equipment 1.5.4.1.3 Toys and games 1.5.4.1.4 Camping equipment 1.5.4.1.5 Cameras, etc. 1.5.4.2 Multivoltage/Step-Down Transformer 1.5.4.2.1 Voltages 1.5.4.2.2 Windings/color codes 1.5.4.3 Residential systems 1.5.4.3.1 Bells, buzzers, chimes, etc. 1.5.4.3.2 Telephones 1.5.4.3.3 Alarms 1.5.4.3.4 Low voltage lighting 1.5.4.3.5 Toy train/ racing sets, etc. Module 2.0: Introduction to Electricity with Line Voltage Applications 2.1 Common Sources of Electricity 2.1.1 Cells and Batteries 2.1.2 Generators 2.1.3 Solar Cells 6 2.2 House Wiring 2.2.1 Generation and Distribution Systems 2.2.1.1 Electrical service 2.2.1.2 Kilowatt-hour meter 2.2.1.3 Service center 2.2.1.4 Circuits 2.2.1.5 Fuses and circuit breakers 2.2.1.6 Checking and resetting 2.2.2 Electrical Lines and Wiring 2.2.2.1 National Electrical Code 2.2.2.2 Common wire sizes and color codes 2.2.2.3 Wall, surface, and underground lines 2.2.2.4 Extension cords 2.2.2.5 Exterior wiring systems 2.2.3 Basic Servicing 2.2.3.1 Continuity/ground tests 2.2.3.2 Replacing switches and receptacles 2.2.3.3 Junction and outlet boxes 2.3 Appliance Systems 2.3.1 Lighting Systems 2.3.1.1 Incandescent devices 2.3.1.2 Fluorescent devices 2.3.1.3 Track and recessed lighting 2.3.1.4 Common ratings and specifications 2.3.2 Heating Systems 2.3.2.1 Common elements/devices 2.3.2.2 Controls: manual, electronic, programmable 2.3.2.3 Common ratings and specifications 2.3.3 Electromagnetic Systems 2.3.3.1 Magnetic effect 2.3.3.2 Universal motors 2.3.3.3 Motor-driven applications 2.4 Consumer Education 2.4.1 Manufacturer Specifications and Ratings 2.4.1.1 Operating instructions and parameters 2.4.1.2 Efficiency ratings 2.4.2 Criteria for Evaluating and Purchasing Products 2.4.3 Consumer Protection and Services 2.4.3.1 Warranty and guarantee 2.4.3.2 Consumer publications 7 Module 3.0: Electronics 3.1 Introduction to Electronics – Systems and Subsystems 3.1.1 Common Systems 3.1.1.1 Communications 3.1.1.2 Knowledge/information 3.1.1.3 Production/manufacturing 3.1.1.4 Transportation 3.1.1.5 Energy 3.1.2 Component Subsystems 3.1.2.1 Passive 3.1.2.2 Active 3.1.2.3 Integrated circuits 3.2 General Safety Instruction 3.2.1 Personal safety – physiological effects of current/voltage 3.2.2 Emergency first aid for electrical shock 3.2.3 Accident prevention 3.3 Introduction to Basic Passive Devices and Circuit Applications 3.3.1 Resistors 3.3.1.1 Common types 3.3.1.1.1 fixed 3.3.1.1.2 variable 3.3.1.1.3 special 3.3.1.2 Laboratory skills 3.3.1.2.1 Symbols 3.3.1.2.2 Units of measurement 3.3.1.2.3 Color code charts 3.3.1.2.4 Testing 3.3.1.3 Applications 3.3.1.3.1 Limiting current 3.3.1.3.2 Energy consumption 3.3.1.3.3 Heat dissipation 3.3.2 Capacitors 3.3.2.1 Common types 3.3.2.1.1 fixed 3.3.2.1.2 variable 3.3.2.1.3 special 3.3.2.2. Laboratory skills 3.3.2.2.1 Symbols 3.3.2.2.2 Units of measurement 3.3.2.2.3 Testing opens/shorts 3.3.2.3 Applications 3.3.2.3.1 Filters 3.3.2.3.2 Tuners 3.3.2.3.3 Timing 8 3.3.3 Inductors 3.3.3.1 Common types 3.3.3.1.1 air core 3.3.3.1.2 iron core 3.3.3.2 Laboratory skills 3.3.3.2.1 Symbols 3.3.3.2.2 Units of measurement 3.3.3.2.3 Testing 3.3.3.3 Applications 3.3.3.3.1 Antennas 3.3.3.3.2 Tuners 3.3.3.3.3 Transformers 3.3.3.3.4 Relays 3.4 Introduction to Basic Active Devices and Circuit Applications 3.4.1 Diodes 3.4.1.1 Common types 3.4.1.1.1 Silicon 3.4.1.1.2 Germanium 3.4.1.1.3 LED’s 3.4.1.2 Symbols, specifications, lead identification, and testing 3.4.1.3 Applications 3.4.1.3.1 Rectification 3.4.1.3.2 Blocking 3.4.1.3.3 LED indicators 3.4.2 Transistors – Bipolar 3.4.2.1 Common types – NPN/PNP 3.4.2.2 Symbols, specifications, lead identification, and testing 3.4.2.3 Applications 3.4.2.3.1 Switching 3.4.2.3.2 Amplification 3.4.3 Silicon Controlled Rectifier (SCR) 3.4.3.1 Common types 3.4.3.2 Symbols, specifications, lead identification, and testing 3.4.3.3 Applications 3.4.3.3.1 Alarm systems 3.4.3.3.2 Trigger systems 3.5 Laboratory Experimentation and Circuit Fabrication 3.5.1 Methods of Circuit Construction and Safety Practices 3.5.1.1 Use of functional system block diagrams 3.5.1.1.1 Guitar amplifier 3.5.1.1.2 Light dimmer 3.5.1.1.3 Strobe light 3.5.1.1.4 Crystal detectors, etc. 9 3.5.1.2 3.5.1.3 3.5.1.4 3.5.1.5 3.5.1.6 Use of laboratory equipment Use of tools and machinery Printed circuit fabrication Wire wrapping and soldering Testing and troubleshooting 3.5.2 General Safety Instruction Refresher 3.5.2.1 Personal safety – physiological effects of current/voltage 3.5.2.2 Emergency first aid for electrical shock 3.5.2.3 Accident prevention 3.6 Introduction to Integrated Circuits 3.6.1 Digital and Linear Types 3.6.1.1 Definition of each, specific to operation 3.6.1.2 Common types and uses 3.6.2 Laboratory Experimentation with Digital IC’s 3.6.2.1 Operating characteristics 3.6.2.2 Pin locations, wiring considerations, and handling 3.6.2.3 Using digital logic information – binary number system 3.6.3 Laboratory Experimentation with Linear IC’s 3.6.3.1 Operating characteristics 3.6.3.2 Using linear devices 3.6.4 Impacts of Integrated Circuit Technology 3.6.4.1 Human needs as an influence on technology 3.6.4.2 Technology as an influence on human needs 3.6.4.3 Future trends 3.6.4.3.1 Global interdependence 3.6.4.3.2 Cultural transitions 3.6.4.3.3 Industrial to information based society 3.6.4.4 Robotics 3.6.4.4.1 Pros and Cons 3.6.4.4.2 Future 3.7 Career Exploration 3.7.1 Examination/Research of diverse electricity/electronics opportunities 3.7.2 Developing a career plan 3.8 Consumer Awareness 3.8.1 Developing criteria for evaluating electronic products/services 3.8.1.1 Human needs 3.8.1.2 Quality, efficiency, and cost 3.8.1.3 Frequency of repair 3.8.2 Impacts on resources and environment 10 General Instructional Strategies This should be a course that involves a lot of hands on work by the students. It is recommended that the class size be set to a 20 student maximum. Students should work in pairs for all of the activities. There should be enough equipment so each group has their own set of things. Oscilloscopes, multimeters, and soldering irons are the bare essentials for the course. It is also highly recommended to have access to computers that have some kind of program similar to Electronics Workbench. 11 Module 1.0 Introduction to Electricity with Low Voltage Applications Performance Indicators/Supporting Competencies Students will be able to: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. Distinguish between electrical and electronic products and systems Differentiate between energy and power and list five forms of energy Draw and label a system block diagram illustrating the energy transfer in a common electrical product Demonstrate and use safe practices of the tools and machines Recognize common causes of electrical accidents Interpret a bill of materials and specifications for common electrical components Read and understand schematic diagrams for electrical circuits Produce an electrical circuit from a schematic diagram with breadboarding or printed circuit techniques Perform soldering practices and procedures correctly Execute tests to troubleshoot an electrical circuit Explain a complete electrical circuit by including “source,” “load,” “conductors,” and “control device” Differentiate between conductors and insulators and list examples for both Distinguish between alternating and direct current according to movement of particles Identify simple series and parallel circuits and describe an application in the home for both Read and understand schematic diagrams for simple low voltage circuits Differentiate between transformer and battery operated circuits Produce and test-operate a low voltage circuit from a schematic diagram Identify common low voltage systems and applications in the home environment Suggested Specific Instructional Strategies 1. In a class discussion, differentiate between electrical vs. electronic and energy vs. power. Construct a short outline of applications and their impacts of electrical technologies on other technological fields. Include audiovisual materials of the electrical technology in these fields. 2. After demonstrating safe use of the tools, have students complete a performance test to check mastery of safe tool use. 3. After teaching students how to interpret a schematic drawing and perform simple breadboarding operations, have the students complete a project. A few examples are: a battery tester or voltage tester. 4. Strengthen students’ understanding of voltage, current, resistance, energy, and power through computer assisted instruction. 5. Bring in a speaker from a telephone or alarm system company to explain their electrical circuit installation procedures along with emerging technology in their field. 12 Module 2.0 Introduction to Electricity with Line Voltage Applications Performance Indicators/Supporting Competencies Students will be able to: 1. Distinguish between source of alternating and direct current 2. Identify chemical, electromagnetic, and solar sources of electrical energy 3. Draw and label a functional block diagram showing the basic energy conversion taking place in each source 4. Discuss the function of the National Electrical Code either verbally or written 5. Read and explain simple house wiring schematic diagrams 6. Replace a two-way switch, three-way switch, and receptacle using the correct color code, practices, and procedures. 7. Differentiate between light, heat, and electromagnetic applications of electric current 8. Produce and test-operate simple circuits from diagrams that represent basic lighting, heating, and/or electromagnetic applications or electric current 9. Explain and compare basic specifications, parameters, and efficiency ratings for common electrical appliances. 10. Read and interpret basic wiring and installation diagrams for common electrical appliances. Suggested Specific Instructional Strategies 1. In a class lecture/discussion, talk about energy conversion and basic theory of operation for dry cells, generators, and solar cells. Create a list of natural resources that are used for power generation and discuss problems that are related to resource management. 2. After demonstrating safe laboratory practices, color coding, and wire sizes, have students rewire a lamp, replace a switch, or install external lighting for a driveway. 3. Have students assemble simple breadboard modules of basic lighting, heating, and universal motor circuits. 4. Have the students install some type of appliance (light fixture, or ceiling fan). As a class, discuss basic operating specifications, parameters, and efficiency. Students will give feedback on their thoughts of the manual, both positive and negative. 13 Module 3.0 Electronics Performance Indicators/Supporting Competencies Students will be able to: 1. Identify passive, active, and integrated circuit electronic subsystems functions. 2. Identify various components and match them to their schematic symbol and unit of measurement. 3. Read and interpret schematic drawings. 4. Maintain a safe working environment by showing proper handling of semiconductors, circuits, hand tools, and equipment during activities in the electronics lab. 5. Use a color code chart to interpret resistor size and tolerance. 6. Differentiate between fixed and variable component operation. 7. Produce an electronic circuit from a schematic diagram with breadboarding or printed circuit techniques. 8. Test for proper functioning circuits. 9. Describe the physiological effects of electric current on the human body by listing the potentially hazardous levels of voltage and current and their effects. 10. Differentiate between integrated circuits and discrete components. 11. Draw and explain two applications of digital and linear integrated circuits using a systems model for each application. 12. List different occupations in the electronics and electricity fields. 13. Analyze electronic products’ function and cost efficiency in terms of basic human needs and wants. Suggested Specific Instructional Strategies 1. Introduce simple circuits that are dependant somehow on passive, active, and integrated circuit components. A few of these simple circuits are a burglar alarm a photoelectric control. 2. Invite a speaker who is involved in the electronics or electricity field. 3. Divide students in to groups to develop a decision-making checklist to aid in the selection and purchase of an electronic product. Students may then use the checklist individually or in their groups to investigate and report on a particular consumer product in the class. 4. Give students a simple electronic circuit and have them draw out the schematic diagram of that circuit. 5. Give students a printed circuit board and schematic. Have them assemble the circuit individually or in pairs. 14 Bibliography Boylestand, R. (2002). Introductory circuit analysis (10th edition). Upper Saddle River, New Jersey: Prentice Hall. Boylestad, R., Nashelsky, L. (2001). Introduction to electricity, electronics, and electromagnetics (5th Edition). Upper Saddle River, New Jersey: Prentice Hall. Buban, Schmitt, and Carter.(1999). Electricity and electronics technology. Columbus, OH: Glencoe/McGraw-Hill. Buchla, D., Floyd. (2005). The science of electronics dc/ac. Upper Saddle River, New Jersey: Prentice Hall. Fardo, S., Patrick, D. (2001). Electricity and electronics: a survey (5th edition). Upper Saddle River, New Jersey: Prentice Hall. Floyd, T.L.(1998). Electronic circuit fundamentals. Englewood Cliffs, NJ: Prentice Hall. Gates, E. (2001). Introduction to electronics. New York: Delmar Thomson Learning, Inc. Gibilisco, S. (2001). Teach yourself electricity and electronics. New York: McGraw-Hill/TAB Electronics. Herman, S. (2003). Delmar’s standard textbook of electricity, 3e. Clifton Park, NY: Delmar Learning. Krenz, J.(2000). Electronic concepts. New York: Cambridge University Press. Mileaf, H. (1998). Electricity one – seven (3rd edition). Upper Saddle River, New Jersey: Prentice Hall. Nilsson, J., Riedel, S. (2002). Electric circuits. Upper Saddle River, New Jersey: Prentice Hall. Petruzella, F.(2001). Essentials of electronics. New York: Glencoe/McGraw-Hill. Slone, R. (2000). Tab electronics guide to understanding electricity and electronics. New York: McGraw-Hill/TAB Electronics. Van Valkenburgh, N. (1995). Basic electricity: complete course, volumes 1-5 in 1. Clifton Park, NY: Delmar Learning. 15 Appendices General Web Resources Academy of Applied Science (AAS) American Association for the Advancement of Science American Chemical Society (ACS) American Society of Mechanical Engineers (ASME) ASEE EngineeringK12 Center Association for Career and Technical Education (ACTE) Council on Technology Teacher Education (CTTE) Dr. Waite's SUNY Oswego Academic Web Site Einstein Project Electronic Industries Foundation Epsilon Pi Tau Honorary Fraternity in Technology Florida Technology Education Association For Inspiration and Recognition of Science and Technology (FIRST) Four County Technology Association (Rochester Area) Future Scientists and Engineers of America (FSEA) History of Education - Selected Moments of 20th Century History of Science Society Inner Auto Innovation Curriculum Online Network Institute for Electrical and Electronic Engineers (IEEE) International Society for Technology in Education International Technology Education Association JETS Journal of Technology Education Journal of Technology Education KISS Institute for Practical Robotics (KIPR) Microsoft Educator Resources Mohawk Valley Technology Education Association Montgomery Public Schools NASA - Education Program Nassau Technology Educators Association National Academy of Engineering National Academy of Engineering: TECHNICALLY SPEAKING National Aeronautics and Space Administration (NASA) National Renewable Energy Laboratory (NREL) National Research Council National Science Foundation National Society of Professional Engineers New York State Technology Education Association Niagara County & Western New York TEA Ohio State University Oswego Technology Education Association Project Lead The Way 16 Sills USA Society for Philosophy and Technology Society for the History of Technology Suffolk Technology Education Association SUNY Oswego Dept of Technology Teacher Certification Office NYS TECH CORPS Tech Learning Techne Journal Technology for All Americans Project (standards) Technology Student Association Technology Student Association (TSA) The Learning Institute of Technology Education (LITE) TIES Magazine U.S. Department of Education Specific Web Resources http://www.esfi.org/index.php http://www.st-andrews.ac.uk/~www_pa/Scots_Guide/intro/electron.htm http://www.reprise.com/host/circuits/default.asp http://www.technologypupil.com/elec1/elecex.htm http://www.electronics-tutorials.com/basics/basic-electronics.htm http://science-ebooks.com/electronics/basic_electronics.htm http://www.electronics-tutorials.com/basics/basic-electronics.htm http://home.att.net/~basicelectronics/ http://www.ethanwiner.com/HWTutor.html http://circuit-fantasia.com/tutorial/intro/welcome.html http://www.epemag.wimborne.co.uk/solderfaq.htm http://bach.ece.jhu.edu/~tim/programs/xcircuit/goodschem/goodschem.html DVD, VHS, and Other Instructional Technology Resources Title Introduction to circuits Electricity Electrical circuits: Ohm’s Law Source National Geographic Society Sunburst Communications Meridian Education Corp Format VHS VHS VHS Length 21 mins 18 mins 19 mins 17 Appendix A - Correlation Matrix with NYS Learning Standards for Math, Science, and Technology (Complete text of standards available on line at : www.emsc.nysed.gov Go to MST icon) Content Standards Performance Standards Modules Within This Course Mathematical analysis Scientific inquiry Engineering design All modules Standard 1 “Analysis, Inquiry, and Design” All modules All modules Standard 2 “Information Systems” Retrieve Process Communicate Impacts Limitations Ethics All modules All modules All modules Standard 3 “Mathematics” Mathematical reasoning Number and numeration Operations Modeling Measurement Uncertainty Patterns All modules All modules Standard 4 “Science” Physical setting Living environment Standard 5 “Technology” Engineering design Tools, resources, and technological processes Computer technology Technological systems History of technology Impacts Management Standard 6 – “Interconnectiveness: Common Themes” All modules All modules All modules All modules Module 1 All modules 18 Systems thinking Models Magnitude and scale Equilibrium and stability Patterns of change Optimization All modules All modules Connections Work habits Skills and strategies All modules Module 3 All modules All modules Standard 7 “Interdisciplinary Problem Solving” 19 Appendix B - Examples of Instructional Materials Light Flasher This is a very basic circuit for flashing one or more LEDS and also to alternately flash one or more LEDs. It uses a 555 timer setup as a stable multivibrator with a variable frequency. With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by increasing the value of the capacitor from 10uF to a higher value. For example if it is increased to 22uF the flashing rate becomes 1 second. There is also provision to convert it into an alternating flasher. You just have to connect a LED and a 330ohm as shown in Fig.2 to the points X and Y of Fig.1. Then both the LEDs flash alternately. Since the 555 can supply or sink in up to 200mA of current, you can connect up to about 18 LEDS in parallel both for the flasher and alternating flasher (that makes a total of 36 LEDs for alternating flasher). 20 Appendix C - Examples of Assessment Materials Basic Electricity / Electronics Final ____ 1. Replacing a fuse with one of a higher current rating can cause: a. lights in a house to flicker. c. wiring to overheat. b. a short circuit. d. all of these ____ 2. Most school accidents are caused: a. because safety rules are not observed. b. due to lack of knowledge on the part of the student. c. due to lack of proper instruction by the instructor. d. because unsafe equipment is used. ____ 3. Generally, any voltage above ____ V is considered dangerous. a. 9 c. 120 b. 30 d. 240 ____ 4. Anyone who works in the electrical field should: a. enroll in a first-aid course. b. be prepared to get a few severe electric shocks. c. never work on a live circuit. d. all of these ____ 5. Electricity is commonly defined as: a. the flow of free protons along a conductor. b. the exchange of free nuclei in the conductor from one atom to another through the conductor. c. electromagnetic induction. d. the flow of free electrons from one atom to another through a conductor. ____ 6. The law of electric charges states: a. like charges can neither repel nor attract. b. like charges repel, unlike charges attract. c. unlike charges can neither repel nor attract, whereas like charges can both repel and attract. d. unlike charges repel, like charges attract. ____ 7. In the battery, or voltaic cell, electrons are transferred from one electrode to the other. The electrode that gains electrons is: a. the negative terminal. c. the electrolyte. b. the positive terminal. d. both a and c ____ 8. Electric energy used in homes is measured using: a. a voltmeter. c. an ammeter. b. an ohmmeter. d. a kilowatthour meter. 21 ____ 9. Other factors remaining constant, what would the effect on current flow be in a given circuit if the applied voltage were doubled? a. it would double c. it would be divided by two b. it would remain the same d. it would be divided by four ____ 10. When applying solder to form a soldered terminal connection, the solder is applied: a. directly to the soldering tip. b. at the instant that the heat is applied. c. to the terminal after it has been heated for a few seconds. d. both a and b. ____ 11. Circuit conductors: a. are used to complete the path from component to component. b. have low resistance. c. are usually insulated. d. all of these ____ 12. A string of lamps is connected in parallel to a voltage source. If one lamp burns out, all the other lamps: a. will go out. c. will not be affected. b. will get brighter. d. will get dimmer. ____ 13. A reading of 4.7 k on the display of a digital multimeter indicates a resistance reading of: a. 47,000 . c. 470 . b. 4700 . d. 47 . ____ 14. Technician A says connecting a voltmeter in series with a load will overload the meter. Technician B says connecting an ammeter in parallel with a voltage source will overload the meter. Who is correct? a. Technician A only c. both Technician A and Technician B b. Technician B only d. neither Technician A nor Technician B ____ 15. Generally speaking, the higher the wattage rating of a resistor: a. the higher its ohmic-resistance value. c. the greater its physical size. b. the smaller its ohmic-resistance value. d. the smaller its physical size. ____ 16. If two 12- resistors are connected in parallel in a circuit, their total resistance will be: a. 0.13 c. 6 b. 24 d. 16 ____ 17. A 470,000- resistor may be designated as: a. 47 M b. 470 k. c. 47 k d. 4.7 M. ____ 18. Ohm's law may be interpreted for purposes of calculation as: a. I = V x R. c. V = R/I b. V = I/R. d. I = V/R 22 ____ 19. Which is the general formula for electric power? a. P = V x I c. P = V / I b. P = V x R d. P = I x R ____ 20. A series circuit has: a. one pathway for current flow. b. two pathways for current flow c. three pathways for current flow. d. as many pathways for current flow as there are loads connected in series. ____ 21. The total resistance of a series circuit: a. increases as more loads are connected in series. b. decreases as more loads are connected in series. c. is the sum of all the individual load resistances. d. both a and c ____ 22. Three resistors (R1, R2, and R3) are connected in series to a 120-V source. The values of V1 and V3 are measured and found to be 42 V and 8 V, respectively. The value of V2 would then be: a. 40 V c. 70 V b. 24 V d. 56 V ____ 23. Two voltage sources are connected series-opposing. Technician A says the two voltages are added to obtain the total equivalent voltage. Technician B says the equivalent voltage is given the polarity of the greater voltage. Who is correct? a. Technician A only c. both Technician A and Technician B b. Technician B only d. neither Technician A nor Technician B ____ 24. A parallel circuit has: a. one pathway for current flow. b. two pathways for current flow. c. three pathways for current flow. d. as many pathways for current flow as there are loads connected in parallel. ____ 25. In a parallel circuit, the current flow through each load resistor: a. is exactly the same value. b. varies according to the resistance value of the resistor. c. is greater for resistors with low resistance values. d. both b and c 23 ____ 26. Kirchhoff's voltage law states: a. that the voltage in a circuit varies directly as the resistance varies. b. that the voltage in a circuit is directly proportional to the resistance and inversely proportional to the current. c. that the product of all the voltages in a circuit is equal to zero. d. that around any closed loop in an electric circuit, the sum of the voltage drops is equal to the applied voltage. ____ 27. Consider the circuit in Figure 1. The known voltages and currents are as indicated. Applying Kirchhoff's voltage and current laws, the value of the voltage drop across R2 would be: a. 60 V. c. 20 V. b. 50 V. d. 40 V. ____ 28. Consider the circuit in Figure 1. The known voltages and currents are as indicated. Applying Kirchhoff's voltage and current laws, the value of the current flow through R1 would be: a. 24 A. c. 5 A. b. 9 A. d. 3 A. ____ 29. Consider the circuit in Figure 1. The known voltages and currents are as indicated. Applying Kirchhoff's voltage and current laws, the value of the current flow through R3 would be: a. 12 A. c. 5 A. b. 18 A. d. 3 A. ____ 30. Consider the circuit in Figure 1. The known voltages and currents are as indicated. Applying Kirchhoff's voltage and current laws, if resistor R3 becomes short-circuited, the total resistance will: a. increase. c. remain the same. b. decrease. d. be zero. ____ 31. Consider the circuit in Figure 1. The known voltages and currents are as indicated. Applying Kirchhoff's voltage and current laws, answer the following question. The value of the applied voltage source would be: a. 28 V. c. 24 V. b. 36 V. d. 9 V. ____ 32. The energy capacity of a battery is rated in: a. ampere hours. b. volts. c. amperes. d. ohms. 24 ____ 33. Electric energy is considered to be: a. the energy carried by moving electric changes. b. the energy carried by moving water. c. the energy carried by moving sound waves. d. the energy carried by moving light waves. ____ 34. An electric lamp transforms electric energy into: a. chemical energy. c. heat energy. b. light energy. d. both b and c ____ 35. An electric iron is rated for 5 A and 110 V. How much will it cost to operate theiron for one hour if the electric rate is 5 cents per kWh? a. 0.55 cents c. 55 cents b. 2.75 cents d. $5.50 ____ 36. Direct current is current that: a. flows in one direction only. b. changes direction at regular intervals. c. flows from negative to positive. d. flows from positive to negative. ____ 37. The standard frequency of the AC voltage available from the electric outlet in your home is: a. 120 V. c. 60 Hz. b. 60 V. d. 120 Hz. ____ 38. Wire insulation is color coded to: a. make wiring less expensive. b. identify the ends of the conductors. c. make wiring safer. d. all of these ____ 39. The local electrical inspector is required to: a. inspect all original electrical wiring in a house before power will be supplied to it. b. inspect any replacement of electrical switches or receptacles in a house. c. inspect the service drop connection only. d. both a and b ____ 40. The smallest AWG size of copper wire allowed for permanently installed house wiring is: a. No. 8. c. No. 14. b. No. 10. d. No. 16. ____ 41. Outlet boxes serve to: a. provide a terminus for the wire cable connections. b. support wiring devices. c. provide ground continuity. d. all of these ____ 42. A switch is stamped with the following ratings: 10A/250 VAC "T" This switch would not be approved for use in a circuit: a. rated for 120 V. c. operated from a DC supply. b. rated for 5 A. d. controlling tungsten filament light bulbs. 25 ____ 43. A double-pole, single-throw switch is designed to be used to: a. control light(s) from two positions. b. control light(s) from three positions. c. control light(s) from one position. d. switch both live wires on 240-V heavy-duty circuits. ____ 44. The purpose of fuses or circuit breakers used in house wiring installations is: a. to limit the amount of current that can be passed through a given conductor. b. to prevent overheating of the conductors used in the installation. c. to automatically open the circuit when an electrical fault or overload occurs. d. all of these ____ 45. A polarized plug cap is one: a. marked for north and south poles. b. in which the prongs are always inserted into the receptacle in the same position. c. marked for positive and negative polarity. d. the front of which is completely insulated when assembled. ____ 46. The fluorescent bulb produces light by: a. heating a filament to a white-heat temperature. b. means of a chemical reaction within the tube. c. means of an electron arc established between two cathodes. d. means of magnet induction between two electrodes. ____ 47. The etching of a PC board involves: a. mounting the components in their proper position on the board. b. soldering component leads to pad connections. c. removing all of the non protected copper. d. all of these ____ 48. The waveform displayed on the screen of the oscilloscope represents a plot of: a. voltage versus time. c. current versus time. b. voltage versus current. d. current versus resistance. ____ 49. Nonmetallic sheathed cable is not designed to be: a. buried in plaster. b. located near hot-water pipes or hot-air ducts. c. bent sharply. d. all of these ____ 50. When energy is converted from one form to another: a. a small percentage is usually lost due to inefficiency. b. the total amount of energy converted remains constant. c. the total amount of the new energy form(s) is always less than the original. d. both a and c 26 Answers to final exam 3.9 3.13 3.17 3.21 3.25 3.29 3.33 3.37 3.41 3.45 3.49 3.53 3.57 C D A B B D D B A C D B D 3.10 3.14 3.18 3.22 3.26 3.30 3.34 3.38 3.42 3.46 3.50 3.54 3.58 A B C B D C D B D B C C D Example Project Rubric Burglar Alarm Schematic Drawing Etching of circuit board Fabrication of circuit board Safety rules followed Participation 30% 25% 25% 10% 10% 3.11 3.15 3.19 3.23 3.27 3.31 3.35 3.39 3.43 3.47 3.51 3.55 B A D C A B D D B A D C 3.12 3.16 3.20 3.24 3.28 3.32 3.36 3.40 3.44 3.48 3.52 3.56 A D C C A D A A A C D A 27 3.59 Appendix D - Students with Disabilities The Board of Regents, through part 100 Regulations of the Commissioner, the Action Plan, and The Compact for Learning, has made a strong commitment to integrating the education of students with disabilities into the total school program. According to Section 100.2(s) of the Regulations of the “Commissioner of Education, “Each student with a handicapping condition as such term is defined in Section 200.1(ii) of this Chapter, shall have access to the full range of programs and services set forth in this Part to the extent that such programs and services are appropriate to such student’s special educational needs”. Districts must have policies and procedures in place to make sure that students with disabilities have equal opportunities to access diploma credits, courses, and requirements. The majority of students with disabilities have the intellectual potential to master the curricula content requirements of a high school diploma. Most students who require special education attend regular education classes in conjunction with specialized instruction and/or related services. The students must attain the same academic standards as their non-disabled peers to meet graduation requirements, and, therefore, must receive instruction in the same content area, at all grade levels. This will ensure that they have the same informational base necessary to pass statewide testing programs and meet diploma requirements. Teachers certified in the subject area should become aware of the needs of students with disabilities who are participating in their classes. Instructional techniques and materials must be modified to the extent appropriate to provide students with disabilities the opportunity to meet diploma requirements. Information or assistance is available through special education teachers, administrators, the Committee on Special Education (CSE) or student’s Individualized Education Program (IEP). Strategies for Modifying Instructional Techniques and Materials. 1. Students with disabilities may use alternative testing techniques. The needed testing modification must be identified in the student’s Individualized Education Program (IEP). Both special and regular education teachers need to work in close cooperation so that the testing modifications can be used consistently throughout the student’s program. 2. Identify, define, and pre-teach key vocabulary. Many terms in this syllabus are specific, and some students with disabilities will need continuous reinforcement to learn them. It would be helpful to provide a list of these key words in the special education teacher in order to provide additional reinforcement in the special education setting. 3. Assign a partner for the duration of a unit to a student as an additional resource to facilitate clarification of daily assignments, timelines for assignments, and access to daily notes. 4. When assigning long-term projects or reports, provide a timeline with benchmarks as indicators for completion of major sections. Students who have difficulty with organizational skills and time sequence ma need to see completion of sections to maintain the organization of a lengthy project or report. 28 Infusing Awareness of Persons with Disabilities Through Curriculum. In keeping with the concept of integration, the following subgoal of the Action Plan was established. In all subject areas, revisions in the syllabi will include materials and activities related to generic subgoals, such as problem solving, reasoning skills, speaking, capacity to search for information, the use of libraries, and increasing student awareness of and information about the disabled. The purpose of this subgoal is to ensure that appropriate activities and materials are available to increase student awareness of disabilities. The curriculum, by design, includes information, activities, and materials regarding persons with disabilities. Teachers are encouraged to include other examples as may be appropriate to their classroom or the situation at hand. 29 Appendix E - Student Leadership Skills Development of leadership skills is an integral part of occupational education in New York state. The New York State Education Department states that “each education agency should provide to every student the opportunity to participate in student leadership development activities. All occupational education students should be provided the opportunity to participate in the educational activities of the student organization(s) which most directly relate(s) to their chosen educational program”. Leadership skills should be incorporated in the New York state occupational education curricula to assist students to become better citizens with positive qualities and attitudes. Each individual should develop skills in communications, decision making/problem solving, human relations, management, and motivational techniques. Leadership skill may be incorporated into the curricula as competencies (performance indicators) to be developed by every student or included within the suggested instructional strategies. Teachers providing instruction through occupational educational curricula should familiarize themselves with the competencies. Assistance may be requested from the State adviser of the occupational student organization related to the program area. Students who elect to become active members in student leadership organizations chartered by NYSED have the advantage of the practical forum to practice leadership skills in an action-oriented format. They have the potential for recognition at the local, state, and national level. More information in Technology Education can be found at the Technology Education Student Association web site at: http://www.tsawww.org