Electrical Engineering Crossword (Issue 279)

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

279-crossword-key

Across

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]

Down

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
10.    MICROKERNEL—µK
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.

ACROSS

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

DOWN

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.

ACROSS

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

DOWN

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.

Across
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]

Down
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.

Across

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]

Down

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]

 

Down

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.

Across

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]

 

Down

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.

Across

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

 

Down

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.

Across

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

 

Down

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.

Across

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]

 

Down

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.

Across

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]

Down

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.

Across

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

Down

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]

 

Electronics Engineering Crossword (Issue 267)

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

Across

1.     QUADRATURESIGNAL—Can be produced using two sensors spaced at odd half-slot multiples around a single track [two words]

4.     MICROELECTROMECHANICAL—This type of system’s size ranges from 20 µm to 1 mm

8.     MANCHESTERCODE—A low-to-high transition means “0” and a high-to-low transition means “1” [two words]

9.     ABSOLUTEDECODER—Because these devices have only one track per bit of resolution, they can require large diameters, which gives them a nonvolatile and unique output for each position [two words]

15.   BATTERY—Italian physicist Alessandro Volta (1745–1827) is credited with inventing the first one of these in the 1800s

16.   DIGITALFILTER—A piece of software, firmware, or logic circuit that takes a digital data flow as an input and provides a filtered version of this signal on its output [two words]

17.   CONCURRENCY—Topic of columnist Bob Japenga’s ongoing article series, which began in Circuit Cellar 263, 2012

18.   EXBIBYTE—1,152,921,504,606,846,976 bytes

19.   RELATIVEHUMIDITY—Amount of water vapor in the atmosphere expressed as a percentage of the total amount the air can hold at the current temperature [two words]

Down

2.     ACCELEROMETER—The design in Mark Pedley’s article, “eCompass: Build and Calibrate a Tilt-Compensating Electronic Compass” (Circuit Cellar 265, 2012), was built using one of these

3.     SANDER—New Zealand-based Circuit Cellar contributor and recent interviewee who is fascinated with advanced robot technologies

5.     PHASELOCKEDLOOP—This control system generateS an output frequency, which can be either higher or lower than the input, based on a reference input clock [three words]

6.     NEUROMORPHICCircuit Cellar’s October’s interviewee, Helen Li, believes this type of computing will solve the contradiction between the limited functions of computing systems and the ever-increasing variety of applications

7.     ELECTROSTATIC—This type of cell consists of a thin plastic film sandwiched between two metal stators

10.   BOOSTCONVERTER—Its output voltage is greater than its input voltage [two words]

11.   ARMSTRONG—American engineer (1890—1954) who invented the regenerative circuit, the super-regenerative circuit, the superheterodyne receiver, and modern frequency modulation (FM) radio transmission

12.   INCLINOMETER—Used to measure tilt

13.   SHALLENBERGER—American engineer (1860–1898) who invented an induction meter to measure alternating current

14.   MEMRISTOR—The functional equivalent of a synapse

 

Electronics Engineering Crossword (Issue 266)

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

Across

3.     ZUSE—German engineer inventor and engineer (1910–1995) who is credited with creating the Z3, a program-controlled Turing-complete computer

5.     ROOTMEANSQUARE—Alternating voltage/current with the exact same energy content as the same value of direct current; a.k.a., quadric mean [three words]

10.   BLOB—Stores binary data; synonym: drop

13.   KLYSTRON—A specialized linear-beam vacuum tube

16.   ELECTROMAGNET—English physicist and inventor William Sturgeon (1783-1850) is credited with using electric current to develop the first one of these objects in 1825

17.   LACOSTE—Circuit Cellar columnist who frequently writes about frequency

18.   SMARTSWITCH—An energy-saving device that was the topic of Fergus Dixon’s article (Circuit Cellar, 263 2012) [two words]

19.   PICOAMMETER—Measures low current

Down

1.     PUBLICKEYCRYPTOGRAPHY—Decodes using two pieces of information, one public and one private [three words]

2.     COMPRESSIONDRIVER—A loudspeaker that achieves high efficiencies by using a consolidating technique [two words]

4.     SPIDER—The flexible collar that helps keep a voice coil magnetically centered

6.     MICROPOWERIMPULSERADAR—A pocket-sized radar that runs off AA batteries and is often used as a basic motion sensor for security applications [three words]

7.     ALPHATESTING—Check performed by an independent team on a system installed at a place other than the targeted customer’s site [two words]

8.     ATOMICOPERATION—An action that is non-interruptible by any other one and never presents partial results to an outside observer [two words]

9.     EMBEDDED—As Circuit Cellar prepares to celebrate its 25th anniversary, a  past, present, and future key theme of the magazine centers on this type of technology

11.   SIGNALPROCESSING—Involves measuring physical quantities with time and spatial variances [two words]

12.   FLOWCHARTING—Jeff Bachiochi describes how to use this technique to write code in this issue

14.   CONVOLUTION—Mark Csele’s article, “DSP-Based Color Organ” (Circuit Cellar, 249 2012), used this technique to create high-performance filters

15.   MULTIPLEXER—A device that combines input signals, shares a single transmission channel, and enables data compression

 

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