EE122 - Introduction toElectronic Circuit Design

Prof. Greg Kovacs

with Amy Droitcour and Bob Ricks

Department of Electrical Engineering

Stanford University

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About EE122• “Curiosity-driven” laboratories with a flexible structure.

• A team-based approach to learning.

• Practical, rather than theory-driven content.

• Preparation for laboratories will involve team research and analysis, rather then lengthy write-ups.

• An informal lab-book-based approach to taking data.

• No formal examinations (midterms or final), with grading based on laboratory notebooks, teamwork, and final project.

• Final project with a full three weeks provided for design and construction.

• Final demos given by each team to the entire class.

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An introduction to gEEk culture.

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EE122 Course Goals

• Analog circuit design knowledge.

• Introduction to sensors.

• Working knowledge of interface electronics (to the “real world”).

• Developing circuit design intuition.

• Experience with teamwork in experimentation, documentation and design.

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Basic Things You Have to Handle

• Know how to use Excel (how to enter data and how to make plots).

• Know how to use Word (including importing graphics) and how to generate PDF files.

• Find a form of SPICE that you are comfortable with (B2Spice, PSPICE, HSPICE, or whatever). TA’s will help.

• Get a copy of Horowitz and Hill, “The Art of Electronics.”

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Your Professor in ˜ 1961

Gotta hackcircuits!

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Sandy Plewa (CISX-203)723-0720, splewa@leland

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Bob Ricksbricks@mail.arc.nasa.gov

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Amy Droitcouradroit@stanford.edu

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Grading

• Laboratory notebooks - 20%

• Formal laboratory write-ups - 30%

• Final project (team) demonstration/presentation and write-up - 40%

• TA evaluation of laboratory skills (individual) - 10%

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THIS IS A PROJECT-BASEDCLASS!

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Spring 00/01

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On Clear Communication

• You are the chief airplane washer at the company hangar and you:

(1) Hook high pressure hose up to the soap suds machine.(2) Turn the machine "on".(3) Receive an important call and have to leave to go home.(4) As you depart for home, you yell to Don, your assistant, "Don, turn it

off.”(5) Assistant Don thinks he hears, "Don't turn it off.” He shrugs, and

leaves the area right after you.(6) Refer to next slide for the results.

• As with any occupation make sure everyone has a clear understanding of what you are communicating.

• This un-doctored picture shows what actually happened.

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Safety Issues

• Electricity can kill you.

• Keep voltages below +/-15 V unless specifically authorized.

• No line-powered projects please. Use the bench power supplies, “wall wart” AC adapters, solar cells, or batteries.

• If any circuits interface to the human body, they must be battery powered and isolated from any instruments, etc.

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Electrostatic Discharge Protection

• “Normal” static electricity we carry can severely damage CMOS chips.

• With POWER OFF, touch something grounded before handling a chip.

• Once on a board, the chips are pretty safe.

Photos Courtesy of Analog Devices.

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LTC1475LTC1475

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Please keep the lab neat!

It is your job.

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NO!

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Good Books

• Horowitz and Hill, “The Art of Electronics.”

• Application notes and books of them from chip manufacturers like:

– National Semiconductor

– Linear Technology

– Maxim

– Analog Devices

• Electronics “cookbooks” (various) - check Fry’s and Jameco.

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Good Magazines

• Nuts and Volts (www.nutsvolts.com).

• Wireless World.

• Popular Electronics.

• Elektor (way cool Euro mag!) (http://www.elektor-electronics.co.uk/index.html)

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Good (New) Parts Sources• Digi-Key - www.digikey.com

• Jameco - www.jameco.com

• Fry’s (but don’t ask for help) - www.outpost.com (doesn’t list all items in store)

• Allied - www.alliedelec.com

• Newark - www.newark.com

• Radio Shack - www.radioshack.com

• Hosfelt (yes, it’s real) - www.hosfelt.com

• Let us know of any others you find - they will be added to this list!

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Good Surplus Sources

• Haltek, Mountain View, CA - OUT OF BUSINESS!!!!

• Halted Specialties, Inc., Santa Clara, CA– 3500 Ryder St., Santa Clara, (408) 732-1573– www.halted.com– Great selection of parts.

• Alltronics– Parts, some instruments, much junk (catch owner in a good mood).– 2300D Zanker Road, San Jose, (408) 943-9773, www.alltronics.com

• Gateway, various cities, (800) 669-5810– Cool surplus parts.

• Davylin Corp., North Hollywood, CA– www.Davylin.com/Electronics– Test instruments, weird military stuff.

• Resources Unlimited, Manchester, NH– can be hard to deal with, but have large selection of optics, lasers, and weird stuff.– (800) 810-4070

• All Electronics, Van Nuys, CA– www.allcorp.com

• Foothill and Livermore Swap Meets– Livermore 1st Sunday of every month all year– Foothill 2nd Saturday of every month summer/fall only

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More Surplus Sources

• Marlin P. Jones & Assoc., Inc.– P.O. Box 12685, Lake Park, FL 33403-0685– (800) 652-6733– www.mpja.com– Lots of cool video stuff, kits and parts.

• American Science and Surplus– www.sciplus.com– Weird assortment...

http://community.webshots.com/photo/1297708/1510906PaIhCjlKGC

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Schedule• Week of 9/29 - Instrumentation: Physical and Virtual (SPICE)

• First class is: Monday 9/29

Notes: Lab assignments, course organization will be discussed. Kovacs, Gilchrist, Ricks, and TAs will introduce themselves in class and schedule laboratory times.

Students should purchase textbooks and laboratory books.

Lecture Topics:

• Review of basic instruments (physical and virtual).

• Review of electronic components.

• Introduction to the design process.

• Week of 10/6 - Basic Op-Amp Concepts

Students will learn how to operate the electronic instruments in the laboratory and familiarize themselves with the necessary software, as required.

Lecture Topics:

• Power sources such as basic power supply circuits, batteries, etc.

• Operational amplifier circuits (inverting and non-inverting amplifiers, summers, etc.).

• Limitations and strengths of integrated circuit opertional amplifiers.

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Schedule• Week of 10/13 - Frequency Concepts and Nonlinear Circuits

Students will experiment with simple operational amplifier circuits and get a feel for what these chips can and cannot do.

Lecture Topics:

• Analog filter circuits.

• Nonlinear operational amplifier circuits.

• Simple oscillators.

• Week of 10/20 - Interface Circuits

Students will learn to use filters, nonlinear circuits with op-amps, and how to generate a basic set of useful signals. “Fooling around” with the circuits will be encouraged.

Lecture Topics:

• Interface circuits to motors, relays, lamps, etc., using discrete transistors (bipolar and MOSFET).

• Digital-to-analog and analog-to-digital concepts.

• Basic sensor concepts - how circuits see, feel, hear, etc.

Project proposals due in class on Monday, 10/27. Approved project proposals will be returned to teams in class on Wednesday, 10/29. Turning in proposals early is highly encouraged!

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Schedule• Week of 10/27 - Optoelectronics

Students will use simple circuits to interface to a variety of “real-world” devices.

Lecture Topics:

• LED’s, lasers, phototransistors, and other interesting optoelectronic devices.

• Simple circuits to move information with light.

• Week of 11/3 -Additional Circuit Concepts, Final Project Construction - Droitcour

Students will gain hands-on experience with optoelectronic components and demonstrate an optical signal transmitter and receiver.

Lecture Topics:

• A variety of useful circuit building blocks.

• Week of 11/10 - Additional Circuit Concepts, Final Project Construction - Droitcour

Students will be exposed to a variety of interesting circuit concepts that might come in handy when working on the details of their projects.

Lecture Topics:

• More interesting circuit tricks.

• Brief student project presentations in class.

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Schedule• Week of 11/17 - Final Project Construction - Droitcour

• Students should begin construction of projects, obtain any special components, and team member responsibilities should be clarified and assigned.

Lecture Topics:

• How to build prototype circuits.

• How to debug analog circuits.

• Brief student project presentations in class.

• Week of 11/24 - Final Project Construction

Students should be finishing project fabrication and testing.

Lecture Topics:

• Student question-and-answer to help with project-related problems.

• More interesting circuits.

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Schedule

• Week of 11/25 - Dead Week - Demonstrations , Write-Ups Due

Students should be finishing project fabrication and testing.

NO LECTURES

• The final project demonstrations are scheduled for Wednesday, 12/3, and the final reports are due Friday, 12/5 by 5 pm (please turn them in to Ms. Sandy Plewa).

• Demo day is not flexible. All students must attend. Please block this date on your calendar right now. Please.

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Analog in the Great Outdoors….

Projects for sports and explorationare welcomed!

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Some Interesting Project Ideas

• Op-amp tester.

• Magnetic field probe.

• Ultrasonic translator.

• Eyeblink sensor - sleepiness monitor.

• Differencing dual sensor.

• Acoustic ranging system.

• Amplified stethoscope.

• LED oscilloscope.

• Electronic sculpture.

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Some Interesting Project Ideas

• Function generator.

• Precision power supply.

• Voice spectrum shifter.

• Cheapo network analyzer.

• Optical voice communicator.

• Peltier heater/cooler.

• Earthquake detector (with simple multi-band spectrum analyzer).

• Infrared intrusion alarm.

• Bi-amplified audio system.

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Challenge Project Ideas

• Best use of Polar heart monitor technology (need to build a 5 kHz magnetically coupled receiver).

• Best health related device.

• Best gadget for outdoor use (mountaneering, skiing, scuba diving, etc.).

• Best athletic training gadget.

• Electronic art - something interactive and cool.

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BootyBeware

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BeerCooler

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UltrasonicDistanceGauge

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Disco Mixer

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Dissin’Parrot

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LineFollowingRobot Car

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Example of HowTo Build Projects

• The “Tweak-O” guitar effects box article by Steve Daniels (http://home.netcom.com/~smallbearelec) is a great example of how to build, package and decorate a project.

• The circuit itself, however, is a bit too simplistic for EE122.

• PDF of article courtesy of Steve Daniels.

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Gotta hackcircuits!