Electrical Engineering Crossword (Issue 282)

The answers to Circuit Cellar’s January electronics engineering crossword puzzle are now available.



4.    VENNDIAGRAM—Represents many relation possibilities [two words]
5.    PERSISTRON—Produces a persistent display
9.    CODOMAIN—A set that includes attainable values
12.    HOMOPOLAR—Electrically symmetrical
13.    TRUTHTABLE—Determines a complicated statement’s validity [two words]
17.    POWERCAPPING—Controls either the instant or the average power consumption [two words]
18.    MAGNETRON—The first form, invented in 1920, was a split-anode type
20.    TURINGCOMPLETE—The Z3 functional program-controlled computer, for example [two words]


1.    CHAOSCOMPUTERCLUB—Well-known European hacker association [three words]
2.    LOGICLEVEL—When binary, it is high and low [two words]
3.    LINEARINTERPOLATION—A simple, but inaccurate, way to convert A/D values into engineering units [two words]
6.    SYNCHRONOUSCIRCUIT—A clock signal ensures this device’s parts are in parallel [two words]
7.    BOARDBRINGUP—Design validation process [three words]
8.    HORNERSRULE—An algorithm for any polynomial order [two words]
10.    MEALY—This machine’s current state and inputs dictate its output values
11.    SQUAREWAVE—It is produced by a binary logic device [two words]
14.    THEREMIN—Its electronic signals can be amplified and sent to a loudspeaker
15.    ABAMPERE—10 A
16.    SCOPEPROBE—Connects test equipment to a DUT [two words]


Electrical Engineering Crossword (Issue 281)

The answers to Circuit Cellar’s December electronics engineering crossword puzzle are now available.



4. VENNDIAGRAM—Represents many relation possibilities [two words]
5. PERSISTRON—Produces a persistent display
9. CODOMAIN—A set that includes attainable values
12. HOMOPOLAR—Electrically symmetrical
13. TRUTHTABLE—Determines a complicated statement’s validity [two words]
17. POWERCAPPING—Controls either the instant or the average power consumption [two words]
18. MAGNETRON—The first form, invented in 1920, was a split-anode type
20. TURINGCOMPLETE—The Z3 functional program-controlled computer, for example [two words]


1. CHAOSCOMPUTERCLUB—Well-known European hacker association [three words]
2. LOGICLEVEL—When binary, it is high and low [two words]
3. LINEARINTERPOLATION—A simple, but inaccurate, way to convert A/D values into engineering units [two words]
6. SYNCHRONOUSCIRCUIT—A clock signal ensures this device’s parts are in parallel [two words]
7. BOARDBRINGUP—Design validation process [three words]
8. HORNERSRULE—An algorithm for any polynomial order [two words]
10. MEALY—This machine’s current state and inputs dictate its output values
11. SQUAREWAVE—It is produced by a binary logic device [two words]
14. THEREMIN—Its electronic signals can be amplified and sent to a loudspeaker
16. SCOPEPROBE—Connects test equipment to a DUT [two words]

Electrical Engineering Crossword (Issue 280)

The answers to Circuit Cellar’s November electronics engineering crossword puzzle are now available.



2.    DOPPLERLIMIT—Temperature restrictions for laser cooling techniques [two words]
4.    PINKNOISE—This signal sees the world through rose-colored glasses [two words]
5.    BOLTZMANNCONSTANT—k or kB [two words]
7.    XORGATE—A half adder is made of an AND gate and one of these [two words]
14.    NEPER—Symbolized by “Np”
15.    GOTOPAIR—Two tunnel diodes used in high-speed gate circuits [two words]
17.    YAGI—Unidirectional antenna
18.    PHOSPHOR—Used as a light source in a cathode ray tube
19.    KERREFFECT—All materials show this, but certain liquids display it more strongly than others [two words]


1.    WEINBRIDGEOSCILLATOR—This type generates sine waves [three words]
3.    INTEGRATEDINJECTIONLOGIC—These digital circuits are built with several collector BJTs [three words]
6.    CARBONNANOTUBES—Their electronic properties can be metallic or semiconducting [two words]
8.    GILBERTCIRCUIT—Uses diodes and transistors’ logarithmic properties to compensates for nonlinearities and instabilities [two words]
9.    ADDRESSINGMODE—Can be implied by the instruction’s function [two words]
10.    SINADRATIO—Used to measure a signal’s standards
11.    FLATPACK—Semiconductor network sealed in a thin rectangular package
12.    SPEECHCLIPPING—Process that limits peak signals [two words]
13.    COMPANDOR—Condenses or enlarges an electric signal’s dynamic range
15.    GLASS—Device under development by search engine giant
16.    LILLIPUTIAN—A very small robot


Electrical Engineering Crossword (Issue 279)

The answers to Circuit Cellar’s October electronics engineering crossword puzzle are now available.



1.    ERASABLE—The second “E” in EEPROM
4.    NYCRESISTOR—Brooklyn, NY-based open-community workspace [two words]
5.    WHITEHAT—A hacker with ethics may don one of these [two words]
6.    WIMAX—aka, IEEE 802.16
8.    STRUCTUREDQUERY—A type of data-management language [two words]
9.    PACKETSWITCHING—Data grouping method [two words]
11.    VOLTOHMMETER—Capable of measuring  voltage, current, and resistance [three words]
12.    ELUA—It’s free, open source, and embedded
13.    BUCK—A switched-mode power supply converter
14.    GOODPUT—This can be calculated by dividing a transmitted file’s size by the amount of time it takes to transfer the file
16.    GRAYCODE—One bit makes a difference [two words]
17.    UBUNTU—Linux-based OS
18.    WEARLEVELING—When applied to a flash memory, this technique can level out the amount of writes to any given memory block across the entire memory chip [two words]
19.    MOODLE—E-learning software developed by Australian computer scientist Martin Dougiamas
20.    CROSSEDFIELD—This type of microwave amplifier can also be used as an oscillator [two words]


2.    LONGTERMEVOLUTION—Wireless communication standard [three words]
3.    CHEMILUMINESCENCE—A chemical reaction that creates a light emission
7.    BAXANDALL—A negative-feedback circuit used in high-quality audio amplifiers
15.    PAUSEUS—BASIC command that creates a microsecond-based delay


Electrical Engineering Crossword (Issue 278)

The answers to Circuit Cellar’s September electronics engineering crossword puzzle are now available.


4.    ADIABATIC—Heat is neither gained nor lost
5.    DISCRETECIRCUIT—Made of resistors and transistors; not integrated [two words]
8.    FULLDUPLEX—Two-way communication [two words]
10.    KERMIT—Muppet-inspired protocol
12.    DEBIAN—Unix-like OS
14.    CHIRP—Conveys information
16.    FORTRAN—Others like it include BASIC and Pascal
18.    NANOKERNEL—Contains a minute amount of code capable of executing in the hardware’s privileged mode
19.    RHEOSTAT—Current regulator


1.    BIPOLARJUNCTION—There are two types: NPN and PNP [two words]
2.    ECBBUS—1970s communication system for Zilog and Intel microprocessors [two words]
3.    VISUALSERVOING—Used to control a robot’s motions [two words]
4.    ATTOSECOND—10-18 of a second
6.    NICKELCADMIUM—This small, light, high-power type is commonly used in hand-held devices [two words]
7.    DEFCON—Place where hackers annually assemble
9.    PIGGYBACKING—Bi-directional data transmission
11.    GRASSHOPPER—Programming language for rhinos
13.    FLOSSMANUALS—Netherlands-based foundation that provides information about and access to free software [two words]
15.    RASPBERRYPI—An inexpensive SBC [two words]
17.    LIDAR—Laser-based measurement technique


Electrical Engineering Crossword (Issue 277)

The answers to Circuit Cellar’s August electronics engineering crossword puzzle are now available.


6.    ALGORITHM—Search engines use them to produce real-time results
9.    LOSSYCOMPRESSION—Condenses data by getting rid of some of it [two words]
11.    YOTTABYTE—Approximately 1,024 bytes
14.    PETAFLOP—Measures an FPU’s performance
15.    JQUERY—JavaScript library popularity contest winner
17.    THICKCLIENT—Able to function without a central server [two words]
18.    NYBBLE—4 bits
19.    DEGAUSSING—Gets rid of magnetism
20.    SPINTRONICS—aka, magnetoelectronics


1.    YANG—Co-founded a multinational Internet company in 1994
2.    MICROSOFT—Originally created and sold BASIC computer programs for the Altair 8800 microcomputer
3.    CHARACTERLARGEOBJECT—Used to store large amounts of text [three words]
4.    ACGENERATOR—Changes mechanical energy into electrical energy [two words]
5.    DROPPER—Installs malicious code onto computers
7.    TRINITRON—Sony Corp.’s CRT technology
8.    BEAMWIDTH—Commonly specified at –6 dB, –10 dB, and –20 dB
10.    OVERCLOCKING—Makes the time go by more quickly
12.    FERROMAGNETIC—e.g., iron, cobalt, and nickel
13.    BAUDOTCODE—An early digital communication method [two words]
16.    AUTODYNE—Invented in 1914 by electrical engineer Edwin Armstrong, who is also credited with creating FM radio transmission


Electrical Engineering Crossword (Issue 276)

The answers to Circuit Cellar’s July electronics engineering crossword puzzle are now available.

3.    CRAY—Seattle, WA-based supercomputer company founded in the 1970s
5.    SUPERSTATE—A subprogram common to several states [two words]
7.    ONESCOMPLIANT—Inverted bits’ value [two words]
11.    BACKPLANE—Lacks processing and storage
13.    FALSECLOCK—Locks on an incorrect frequency [two words]
15.    TERNARY—This signal is capable of taking on one of three conditions
16.    BLUMLEIN—Known for advancements in telecommunications and radar
17.    JABBER—XML messaging protocol (hint: prior to 2000)
18.    DIRECTCURRENT—Zero frequency [two words]
20.    SERIALTRANSFER—Moves data bit by bit [two words]

1.    LYAPUNOV—Theory applies input-to-state (ISS) to systems with inputs
2.    LOWFREQUENCYOSCILLATOR—Produces a frequency below approximately 20 Hz [three words]
4.    HASHING—Security method
6.    SIGNIFICAND—aka, mantissa
8.    THYRISTOR—They have a four-layer N- and P-type construction
9.    HALFADDER—Combines two single binary digits [two words]
10.    DARKTRACE—A type of direct-view bistable storage tube [two words]
12.    FARADAYCAGE—Electric field-buffer [two words]
14.    SYMMETRIC—Uses the same key to code and decode
19.    KAHAN—Helped create the IEEE 754 floating-point computation specification

Electrical Engineer Crossword (Issue 275)

The answers to Circuit Cellar’s June electronics engineering crossword puzzle are now available.


2.    UNIFIEDMODELING—Language that standardizes software specifications
3.    KELVINBRIDGE—Compares low resistance values [two words]
6.    THINCLIENT—A codependent program [two words]
10.    BANANAPLUG—Makes electrical connections [two words]
11.    CONDENSER—aka capacitor
13.    ASTABLE—A multivibrator circuit
15.    FLIPFLOP—A fundamental building block [two words]
18.    AMMETER—Used to calibrate current
19.    CLOCKGATING—Method of lowering dynamic power dissipation [two words]
20.    THERMIONICVALVE—Uses a vacuum to control electric current [two words]


1.    VISITORPATTERN—Keeps an algorithm away from an object structure
4.    RUNTIME—Multi-lingual computer system
5.    FIELDEFFECT—This type is unipolar [two words]
7.    LISSAJOUSCURVE—An oscilloscope trace [two words]
8.    NONMASKABLE—Cannot be ignored
9.    CASCODECIRCUIT—Provides amplification [two words]
12.    CRON—Keeps things on schedule
14.    ROENTGEN—Radiation measurement
16.    RETFIE—Instruction that enables new interrupts to occur
17.    SELSYN—aka mag-slip

Electrical Engineer Crossword (Issue 274)

The answers to Circuit Cellar’s May electronics engineering crossword puzzle are now available.Across

1.            MOSIPROTOCOL—Adds a state indicating ownership [two words]

3.            SPECTROMETER—Measures wavelengths

8.            SHELL—Protects an operating system’s kernel

10.          CHARGE—Q

12.          ASSIGN—A FORTRAN control statement

13.          HALL—American physicist (1855–1938) who had an “effect” [two words]

15.          FIELDPROGRAMMABLE—Configurable after purchase [two words]

17.          MOUNTPOINT—In a Linux system, create this first to access the queue [two words]

19.          CORDIC—Calculate digit by digit

20.          MEISSNEREFFECT—Flux jumping [two words]



2.            INTERPROCESSCOMMUNICATION—Data exchanging method [two words]

4.            SQUIRRELCAGE—Commonly used in asynchronous motors [two words]

5.            DEGLITCHER—Type of delay circuit, serves as a pulse generator

6.            MERCURYARC—Emits  bright bluish-green light [two words]

7.            BALLGRIDARRAY—Packages ICs [three words]

9.            THREADEDCODE—A compiler technique [two words]

11.          DARAF—Unit of elastance

14.          AMPEREHOUR—3,600 coulombs [two words]

16.          RIPPLE—Unwanted undulation

18.          NIXIE—Used for numeric display


Electrical Engineer Crossword (Issue 273)

The answers to Circuit Cellar’s April electronics engineering crossword puzzle are now available.


1.         BITDENSITY—Bits per inch of magnetic tape, for example [two words]

3.         KALMANFILTER—aka LQE [two words]

5.         EMBEDDEDSECURITY—Circuit Cellar columnist Patrick Schaumont covers this topic with articles about authentication, encryption, and electronic signatures [two words]

7.         HAMMING—Error-correcting code

8.         SPURIOUS—Unintentional

11.       LAND—Electronics and Computer Engineering professor at Cornell University and Circuit Cellar frequent contributor (many of his students contribute to Circuit Cellar as well)

13.       CLAPP—American inventor who developed an oscillator frequency standard

14.       ELECTRODE—Able to interact with nonmetallic circuit parts

16.       RINGOSCILLATOR—A feedback structure with an odd number of digital inverters [two words]

17.       PLESIOCHRONOUS—A system that’s not quite in synch

18.       OSCILLOGRAPH—Takes electric current measurements

19.       REFLECTEDBINARYCODE—Created by Bell Labs physicist and researcher Frank Gray [three words]



2.         DEADBAND—Potentiometer’s part shortened by a tap [two words]

4.         BECHTOLSHEIM—Electronics engineer and co-founder of the company that created Java

6.         CHIPBIOMETRICS—Digital fingerprints [two words]

9.         INCANDESCENT—Illuminating

10.       ALOHANET—Computer networking system from the 1970s

12.       EEVBLOG—Where to find electronics engineer David L. Jones’s off-the-cuff online videos

15.       EULERMETHOD—Solves equations [two words]

17.       POPOV—Helped make electromagnetic radio waves more useful

Electrical Engineer Crossword (Issue 272)

The answers to Circuit Cellar’s March electronics engineering crossword puzzle are now available.


1.     JACOBSLADDER—Climbing arc [two words]

5.     WOZNIAK—Apple I

8.     SPARKCOIL—Uses a low-voltage DC supply to create high-voltage pulses

10.   JITTER—Creates an imperfect timing signal

11.   ERG—Energy measurement

13.   ACOUSTICOHM—Equivalent to µbar s/cm3 [two words]

15.   BUFFER—Provides electrical isolation

16.   WIFI—Provides movement to smartphones, PCs, and tablets

17.   POSIX—An IEEE operating system compatibility standard

18.   PEAKTOPEAK—Alterations between high and low values

19.   MUTEX—Capable of ensuring atomic access to any shared resource

20.   NAKAMURA—University of California, Santa Barbara professor credited with inventing the blue LED



2.     OSCILLATOR—American physicist George W. Pierce (1872–1956); piezoelectric

3.     EIGENTONE—A pitch capable of resonance

4.     FRETSONFIRE—Open-source gameplay for music lovers [three words]

6.     NEGATIVEFEEDBACK—Type of amplifier invented in 1927 by Harold Black [two words]

7.     BAFFLE—Sound wave obstruction

9.     MORSECODE—A pre-texting means of communication [two words]

12.   COMBFILTER—Capable of causing delay [two words]

14.   CHIPSET—Intel created the first family of these

Electrical Engineer Crossword (Issue 271)

The answers to Circuit Cellar’s February electronics engineering crossword puzzle are now available.


3.            CONFORMALCOATING—Used on PCBs intended for extreme environments [two words]

4.            LOOP—An often repetitious code sequence

7.            VUMETER—Measures program volume [two words]

8.            GALVANOMETER—An electric current identifier

10.         FACTORIAL—“n!”

11.         DIPMETER—Evaluates radio frequency circuits [two words]

13.         REEDSOLOMON—Non-binary code [two words]

16.         SHOCKLEY—One of a group of three co-inventors who, in 1956, were awarded the Nobel Prize in Physics for creating the transistor

18.         SUBSTRATE—An insulating board’s surface

19.         TELEPHONY—Concept proposed by Belgian engineer Charles Bourseul in 1856

20.         ACTUATOR—Electric motors and loudspeakers, for example



1.            TORODIAL—A type of inductor or transformer whose windings form a closed circular tube

2.            POTENTIOMETER—May be used to control volume on audio equipment

5.            PIEZOELECTRICITY—Often used to produce and detect high voltages, sound, and electronic frequency generation

6.            OCCAMPROCESS—An electronic circuit board manufacturing method [two words]

9.            FLYWHEEL—An energy-storing device

12.         MONOBLOCK—A single-channel power amp with high current power

14.         RELIABILITY—Quality over time

15.         MICROMETER—Used to measure small objects’ thickness

17.         EISLER—Austrian engineer (1907–992) credited with inventing the printed circuit

Electrical Engineer Crossword (Issue 270)

The answers to Circuit Cellar’s January electronics engineering crossword puzzle are now available.


1.     ICONOSCOPE—The first widely used television camera tube

5.     INTERRUPTROUTINE—Responds to disturbances [two words]

8.     RADIXPOINT—Separates a number’s integer part from its fraction part [two words]

11.   IMPEDANCE—Bridge circuit used to measure resistance

14.   SALLENKEY—A simple filter topology used to implement second-order active filters [two words]

16.   TYNDALLEFFECT—Light scattering [two words]

17.   LADDER—A kind of passive filter

18.   INPUTOUTPUT—Microcontrollers contain these type of peripherals [two words]

19.   IDEMPOTENTLAW—The result never changes [two words]



2.     NANDCIRCUIT—Combines two types of functions in a binary circuit with two or more inputs and one output [two words]

3.     BARDEEN—Won the Nobel Prize in Physics twice

4.     DIODE—Developed in 1904 by English engineer John Ambrose Fleming

6.     ECHOBOX—A device that receives part of a transmitted pulse and transmits it back to the receiver [two words]

7.     KARNAUGHMAP—Used to simplify algebra expressions [two words]

9.     FARADY—English scientist (1791–1867) who published the law of induction

10.   GANGED—Tuning that uses a single control to tune two or more circuits

12.   DCGENERATOR—French instrument maker Hippolyte Pixii developed a prototype for this in 1832 [two words]

13.   ILLUMINATE—What an LED does

14.   SAWTOOTH—A waveform with a slow linear rise time and a fast fall time

15.   RCSERVO—An absolute-positioning actuator that is typically limited to a 180° rotation  [two words]

Electrical Engineer Crossword (Issue 269)

The answers to Circuit Cellar’s December electronics engineering crossword puzzle are now available.


1.     MOSFET—According to Ed Nisley in his Circuit Cellar 265  2012 article, this type of tester characterizes a transistor’s behavior by computing the drain resistance at each combination of measured voltage and current

5.     LORENTZ—Type of force on a charged particle caused by electromagnetic fields

9.     TWEED—Tests your engineering know-how in every issue of Circuit Cellar

10.   HOMECONTROL—In last month’s “Task Manager,” Circuit Cellar Editor-in-Chief C. J. Abate mentioned that this was one of the hottest topics in the magazine’s earliest issues [two words]

12.   TASK—In his article in this issue, Bob Japenga defines this as an instance of a software program that is utilizing CPU resources to accomplish some purpose

14.   WIRTH—Swiss computer scientist who designed the Pascal programming language

16.   ILLUMINATION—An LED’s purpose

18.   CALLBACK—Enables a lower-level software layer to request a higher-level-defined subroutine

19.   ELECTRICALRESISTANCE—German physicist Georg Ohm 1789 – 6 July 1854 first introduced this concept [two words]


2.     SHANNON—Cryptographer known as the “father of information theory”

3.     AUTONOMOUSROBOT—Does not rely on human interaction [two words]

4.     BODEPLOT—Represents a system’s gain and phase as a frequency function  [two words]

6.     EAGLE—Commonly used for PCB design

7.     TACHOMETER—A device that can help you determine revolutions per minute

8.     PROGRAMMABLELOGIC—These types of projects utilize FPGAs, PLDs, and other chips [two words]

11.   THERMOELECTRIC—Type of cooling that relies on the Peltier effect to alter heat between two types of materials

13.   MAGNETOMETER—Used to measure magnetic fields’ strength and intensity

15.   GREENENERGY—Focus of Renesas’s 2012 design challenge [two words]

17.   NONCE—Available for a limited time


Electronic Engineering Crossword (Issue 268)

The answers to Circuit Cellar’s November electronics engineering crossword puzzle are now available.


2.     FLOWCODE—Columnist Jeff Bachiochi taught readers how to use this graphical programming language in his recent article about flowcharting (Circuit Cellar 266, 2012)

7.     LAPLACE—This type of transform is similar to Fourier, but expresses functions into moments as opposed of vibration

11.   RACEWAY—Channel to hold wires, cables, etc.

12.   SENSORSCircuit Cellar’s 250th issue (2011) focused on Measurement and this other topic

13.   LANDS—A metallic contact area

14.   BITTI—Interviewee (Circuit Cellar 253, 2011) who designed the “Witness Camera,” a self-recording surveillance camera

17.   DARLINGTON—This type of pair can be produced using individual transistors or purchased as a single device, as in a 2N6301

18.   WAFER—A slice of semiconductor material upon which monolithic ICs are produced

19.   DIELECTRICCORE—The insulating material that makes up the center of the cable through which the conductors are run [two words]

20.   THERMOPLASTIC—A synthetic, flexible mixture of rosins used as an insulting material


1.     ROUNDKEYS—In his article “Hardware-Accelerated Encryption” (Circuit Cellar 266, 2012) Patrick Schaumont said AES encryption’s real secrecy comes from the periodic additions of these

3.     OILCAN—A type of planar tube, similar to the lighthouse tube, which has cooling fins

4.     VECTORGRAPHICS—In the 1970s, Circuit Cellar founder Steve Ciarcia wrote his first article for BYTE about this topic

5.     VOLTAGECONTROLLED—An oscillator controlled by voltage input; there are usually two types: harmonic and relaxation [two words]

6.     TEMPEST—Describes compromising emanations

8.     ACQUISITIONTIME—In a communications system, the time interval required to attain synchronism [two words]

9.     INTEL—Company credited with making the first single-chip microprocessor

10.   HANDSHAKING—How one device communicates with one or more other devices, at a predetermined speed

15.   VARACTOR—Used as a capacitor to control voltage

16.   SALLENKEY—Active filer, two-pole [two words]