1. Lecture 11: An Electrical Oddity
Electrical, Computer, and Systems Engineering
Off the Beaten Path?
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

2. Career Planning and Educational Context
Find a few technical topics of interest and/or applications that you can return to over and over to provide context for your coursework. Try to find something that connects well with your personal interests.
Find a few job titles/descriptions that you can use over and over to provide context for your course selections
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

3. Career Information: Highlights of EDW Presentations in the Fall
General Info on EE, CSE and EPE
Info from Prof. Radke on Imaging
Info from Prof. Degeneff on Power
Info from James Manchester on jobs at Tellium
Also check my web page
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

4. Example Job Description: EE
Candidate will participate in the design of analog, digital, and power circuits, instrumentation, video, navigation, sonar, electro-hydraulic control systems, embedded controllers, Printed Circuit Board design, computer, network, fiber optic communications, and cable & harness design for underwater vehicle systems in a design team environment. Candidate will also support the drafting, fabrication, test, and evaluation of prototype and production hardware.
Candidate required to be familiar with C++, Matlab & PSpice simulation tools, and OrCad & AutoCAD documentation tools. Candidate required to be familiar with printed circuit board (PCB) design process. Candidate must be capable of operating standard office software packages. Candidate required to be familiar with operation of Oscilloscopes, DMMS, network analyzers, spectrum analyzers, and other test & measurement equipment.
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

5. Technical & Personal Interests: Examples
Music
Recording: Signal compression
Instruments: MIDI or specific instruments
Listening: Audio electronics
History
Electrical science: Telephony, broadcasting
Businesses: GE, IBM, Intel, Microsoft, Palm
Military: Weapons, intelligence
Sports
Playing: Organizing software (team sport) or controls and feedback (auto racing)
Watching: Image processing
Training: Equipment
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

6. An Example of an Application That Can Tie Together Your Education
Involves material from many different courses
Involves many types of career choices
Historically relevant for technology
Historically relevant for international politics
Involves music
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

7. Introduction to Engineering Electronics
2 Minute Quiz Identify the Following Music Some Links Are A Little Slow
Green Hornet
Summertime
Lost in Space
The Swan
Good Vibrations
Day the Earth Stood Still
Smoke Gets In Your Eyes
My Favorite Martian
Dark Shadows 1 2 3 4 5 6
7, 7(alt) 8 9
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

8. Introduction to Engineering Electronics
The Theremin
Clara Rockmore ( )
The theremin was invented in 1919 by a Russian physicist named Lev Termen (his name was later changed to Leon Theremin).
Besides looking like no other instrument, the theremin is unique in that it is played without being touched. Two antennas protrude from the theremin – one controlling pitch, and the other controlling volume. As a hand approaches the vertical antenna, the pitch gets higher. Approaching the horizontal antenna makes the volume softer. Because there is no physical contact with the instrument, playing the theremin requires precise skill and perfect pitch.
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

9. Introduction to Engineering Electronics
The Theremin: Music
The Manatees Jan Vollaard Pamelia Kurstin
Nosebleeds by CHINESEBURN
You Only Live Twice by Project Pimento
3001 by Rita Lee
Latin Soul by the Manatees
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

10. Sources of Theremin Music
(contains a lesson from Pamelia Kurstin)
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

11. Understanding the Theremin
Principles of AM: Amplitude Modulation
Capacitance
Tank Circuits
Oscillators
Schematics and Components
Related Devices
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

12. AM: Amplitude Modulation
Signal
Carrier
Product
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

13. AM: Amplitude Modulation
Square Law Amplitude Modulator
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

14. AM: Amplitude Modulation
Envelope Detector (AM Demodulator)
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

15. AM: Amplitude Modulation
AM Radio Receiver
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

16. Difference Frequencies
First Signal
Second Signal
Difference Signal
AM technique can be used to produce a low frequency signal that is the difference between two high frequency signals
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

17. Introduction to Engineering Electronics
Theremin: How It Works
The Player’s Hand Adds an Additional Capacitance to the Antenna Impedance
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

18. Introduction to Engineering Electronics
Theremin: How It Works
Pitch & Volume Control Using Oscillators
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

19. Introduction to Engineering Electronics
Theremin: How It Works
Fixed pitch oscillator frequency is compared to the frequency of the variable pitch oscillator.
The difference is in the audio range 0-3kHz.
Audio signal is amplified
Volume control works in a similar manner.
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

20. Introduction to Engineering Electronics
Theremin: How It Works
Zero beat oscillator circuit results is very low frequencies
Volume is also controlled by providing some additional capacitance from the player
Voltage controlled amplifier (VCO) is tool Theremin did not have
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

21. Introduction to Engineering Electronics
Theremin: How It Works
Schematic of Etherwave Theremin
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

22. Introduction to Engineering Electronics
Theremin: How It Works
LM13600 – National Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

23. Introduction to Engineering Electronics
Theremin: How It Works
Note, for the tank circuit
The remainder of the circuit reduces this frequency slightly
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

24. Introduction to Engineering Electronics
Theremin: How It Works
Diodes rectify the 14V AC input voltage from the wall wart
LM78L12 National Instruments 3 Terminal Voltage Regulator produces clean 12 volt power
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

25. Introduction to Engineering Electronics
Theremin: How It Works I
DC Voltage to Voltage Regulator I
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

26. Are There Some Devices Based on Similar Ideas?
Metal Detector: The coupling between coils is affected by the proximity of metal, either magnetic or just conducting.
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

27. What Ever Happened to Leon Theremin?
Theremin: An Electronic Odyssey
Leon Theremin was the secret link between sci-fi films, the Beach Boys, and Carnegie Hall. His self-named electronic musical instrument--the first of its kind--took the world by storm in the 1920s and '30s. Theremin: An Electronic Odyssey , winner of Sundance's Filmmakers Trophy, explores the inventor's strange life and times, including his mysterious 50-year disappearance beginning in the 1940s. Interviews with theremin virtuoso Clara Rockmore, synthesizer pioneer Robert Moog, and Theremin's contemporaries, as well as clips from movies such as The Day the Earth Stood Still, featuring the unworldly sounds of his creation, show an eccentric genius working toward success until his sudden vanishing in the Soviet Union. Footage of Theremin at 94 years old, finally rediscovered and rewarded for his achievements, brings a celebratory ending to what could be a grim or at least uncertain story, but instead is a fascinating documentary.
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

28. Introduction to Engineering Electronics
Theremin Information
Moog Music:
Theremin Info:
ThereminWorld:
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

29. Where Will You Encounter This Information Again?
ECSE-4520 Communications Systems: Modulation, Demodulation Fundamentals
ECSE-4060 Communications Circuits: Detectors, Mixers, Modulators, Demodulators
ECSE-2100 Fields and Waves I: Inductance, Capacitance, Transformers
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

30. Introduction to Engineering Electronics
Parting Words
From the Day the Earth Stood Still
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor

31. Acoustics Terminology
Bandwidth: The bandwidth is related to the amount of information which a given channel may transmit. For the human ear, bandwidth is 20-20kHz
Wavelength: Speed of sound divided by frequency
Carrier: In an AM or FM system, the oscillator or signal which is being modulated by the program or modulating oscillator or signal.
Source: Zen Audio Project
20 September September 2018
Introduction to Engineering Electronics
K. A. Connor