Electronics Engineering Crossword (Issue 265)

Here are the answers to the crossword puzzle in Circuit Cellar 265, August 2012. The issue is now available.

Across

1.     CUTOFFFREQUENCY—The frequency where a filter’s output has fallen by 3 dB from the maximum level that can be achieved through the filter [two words]

3.     SHAMIR—Israeli cryptographer and one of inventors of the RSA algorithm

6.     AVOGADROSLAW—V/n = k, where V is the volume of the gas, n is the amount of substance of the gas, and k is a proportionality constant [two words]

8.     NOISEFIGURE—Columnist Robert Lacoste’s article, “Noise Filters 101” (Circuit Cellar, April 2012), discussed how to determine this and measure it in a radio frequency filter [two words]

11.   JAVASCRIPT—ECMAScript-approved language that supports a lot of C-structured programming syntax

12.   VOLTAGESPIKE—Lightening or a tripped circuit wire, for example [two words]

15.   THEAMPHOUR—Name of the radio show co-hosted by two recent Circuit Cellar Q&A interviewees [three words]

16.   BLOCKED—When a software thread relinquishes control of the processor to the operating system

17.   KILBY—American physicist (1923-2005) who worked with Robert Noyce to create the first integrated circuit

18.   OCTAVE—The interval between one musical pitch and another with half or double its frequency

19.   PYROELECTRICDETECTOR—A capacitive sensor that changes its polarization in response to a change in temperature [two words]

20.   KYZPULSE—In a mechanical electrical meter, a pulse that changes state every half rotation of the meter’s disk and represents a quanta of energy [two words]

Down

2.     TOOLCHAIN—Software used to create other software, usually including a text editor, a compiler, a linker, and a debugger

4.     HENRY—A unit of inductance; abbreviation “H”

5.     RADIOFREQUENCY—An amount of oscillation ranging from 3 kHz to 300 GHz [two words]

7.     DEPTHCAMERA—Miguel Sanchez’s article, “Image Processing Development” (Circuit Cellar, June 2012), used one of these along with an MCU and bipolar stepper motors to accomplish some computer vision-related tasks [two words]

9.     OHIOSCIENTIFIC—In 1978, this company released one of its first products—a simple, MOS Technology 6502 microprocessor-based, single-board computer [two words]

10.   PHOTOVOLTAICCELL—According to Jeff Bachiochi’s article in this issue, a single one of these is “a translucent sandwich of P-type and N-type material forming a huge diode junction that can be exposed to a light source” [two words]

13.   LOGPOT—Abbreviation; used as a volume control in audio amplifiers [two words]

14.   AMPERE—An SI unit of electric current

 

Electronics Engineering Crossword (Issue 264)

The answers to Circuit Cellar’s July Electronics Engineer crossword puzzle are now available.

Issue 264 crossword answers

Across

3.     IONIZATION—Occurs when an atom or molecule gains either and positive or negative charge

4.     ANDROIDPHONE—In “Audio-Enhanced Touch Sensors” (Circuit Cellar, May 2012), Matt Oppenheim said one of the stumbling blocks of using this for data collection is that it will try to recharge itself whenever you connect it to a USB port. [two words]

6.     FOLTZER—Circuit Cellar interviewee who participated in Motorola’s IEEE-802 MAC subcommittee on token-passing access control methods. [two words]

13.   COORDINATEDUNIVERSALTIME—A method of keeping the world in sync [three words]

14.   CICCHINELLI—Circuit Cellar published his book about a commonly used computer programming language in 2010

17.   HACKSPACE—i.e, “a circuit cellar”

18.   CHIP—A basic component of an electronic device

19.   VOLTAGEREFERENCE—National Semiconductor’s LM385 series is an example of an adjustable one. [three words]

Down

1.     DOPPLEREFFECT—A phenomenon that occurs when a vehicle sounding a siren approaches, passes, and recedes from an observer [two words]

2.     WAVEFORMGENERATOR—A device that produces electronic signals [two words]

5.     ANGSTROM—Equals 1/10,000,000,000 m

7.     ISOTHERMALPROCESS— ΔT = 0 [two words]

8.     COMPARATOR—A device that compares two voltages or currents and switches its output to indicate which is larger

9.     NSPE—Organization formed in 1934 by bridge engineer David Steinman

10.   EMI—Acronym; common cause of electronic data corruption and subject of Novacek’s December 2011 Circuit Cellar article [two words]

11.   PIEZOELECTRICITY—Occurs when crystals acquire a charge after being compressed, twisted, or distorted (e.g., quartz)

12.   WIDLAR—American electrical engineer (1937–1991); IC pioneer

15.   LEDDRIVER—Circuitry that regulates or provides powers to a light source [two words]

16.   JOULE—Symbolized by 10th letter of the alphabet

20.   RTOS—Hint: acronym. Unscramble the following: IETEORGSEPSMNYMRLTIAEAT

Electronics Engineering Crossword (Issue 263)

Across

1.     SPARKGAP—A space in an otherwise closed electric circuit [two words]

3.     FUZZYLOGIC—Began in 1965 with Lotfi Zadeh’s proposal of a certain type of set theory [two words]

6.     NULLTEST—Cancels a device’s signal input by negative feedback from its output [two words]

7.     COULOMB—One of these is equal to 6.28 x 1018 electrons

10.   EDDYCURRENT—A.k.a. Foucault currents [two words]

11.   KIRCHHOFF—Created a law of thermochemistry

13.   ANDGATE—Relies on truth and logic  [two words]

16.   HOLONYAK—Invented the LED while working at General Electric in the 1960s

17.   SOLIDSTATERELAY—Doesn’t rely on movement or contact to switch electric circuits [three words]

20.   ACCIRCUIT—A circuit with a current that goes one way and then another [two words]

Down

2.     ANNEAL—Run hot and cold

4.     OPTOISOLATOR—Changes electrical signals to light and back into electrical signals

5.     CHECKBIT—Adds a bit to make things even or odd [two words]

8.     MICROFARAD—1,000,000 pF

9.     THEVENIN—French engineer (1857–1926); augmented Ohm’s law

12.   KELVINSCALE—Temperature scale where 0° = absolute zero [two words]

14.   PHOTODIODE—Turns light into current or voltage

15.   ACORNTUBE—A small tube used at very high frequencies [two words]

18.   ERG—Causes 1 cm of movement

19.   ASCII—A character-encoding system used to represent text

 

Electronics Engineering Crossword (Issue 262)

ACROSS

3.     CATHODERAYOSCILLOSCOPE—Isn’t a digital ’scope [three words]

6.     PASSBAND—A super-efficient band of frequencies

9.     MESHNETWORKING—Relies on nodes to capture, distribute, and reproduce data [two words]

11.   PYTHON—An open-source programming language that relies of automatic memory management

13.   NORTONSTHEOREM—A formula for linear electrical networks [two words]

15.   TRIMMER—Variable resistors, variable capacitors, or trimmable inductors, for example

18.   DATATRANSFERRATE—Measures data’s speed of travel [three words]

 

DOWN

1.     COLUMBSLAW—Electrostatic physics principal [two words]

2.     NOVACEK—Wrote 26 feature articles for Circuit Cellar between 1999 and 2004

4.     CYGWIN—Enables you to “get that Linux feeling on Windows”

5.     ELECTROLUMINESCENCE—Light emission caused by electrical influences

7.     SCHMITTTRIGGER—A comparator with two different threshold voltage levels [two words]

8.     POLARITYSWITCH—Reverses an output signal’s absolute phase [two words]

10.   SIEMENS—Equivalent of amperes per volt

12.   RAREFACTION—Sound wave phase

14.   SLEWRATE—Represents a signal’s maximum rate of change [two words]

16.   QFACTOR—Measures the damping of resonator modes

17.   GERBER—PCB file format

19.   TRIODE—An amp device with three electrodes

20.   SPRAGUE—Known as the “father of electric traction”

 

Electronics Engineering Crossword (Issue 261)

The answers to the crossword puzzle published in rCircuit Cellar 261, April 2012.

ACROSS

7. MANCHESTERENCODING—A form of BPSK [two words]

10. REBOOT—Restart

13. HASHTAG—The # label

15. DIRECTORY—File index

17. DAEMON—Takes place behind the scenes

18. FREEBASIC—Open-source programming language compiler

19. MALWARE—Bad code

DOWN

1. PHASESHIFTKEYING—Transports data by altering a reference signal’s phase [three words]

2. FOURIERTRANSFORM—Changes a signal from the time domain to the frequency domain [two words]

3. ATTENUATON—Used to measure signal loss in dB

4. SHANNONTHEOREM—AKA, the noisy-channel coding theorem [two words]

5. BOOLEAN—Logic system named after George Boole

6. FREQUENCYMODULATION—Opposite of AM [two words]

8. COULOMBCOUNTER—Measures battery current [two words]

9. FOURTHGENERATION—4G [two words]

11. FIRSTQUARTILE—25th percentile [two words]

12. NORTONAMPLIFIER—Converts a current to a voltage. [two words]

14. HBRIDGE—Four switching components with the load in center

16. CODIFY—A way to organize