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6,533 results

Project

3D Floor Plan

Floor plans show walls, windows, doors, and other features of a room or building. Architects and engineers use them to study spatial relationships and describe their designs. Typically, floor plans are rendered as two-dimensional drawings.In this…

Project

3D Skull Candy Mold

Whether preparing for Halloween or just a regular day, you can make skull-shaped edibles from this project's 3D candy mold. Like many molds, this one is a hollow container into which you can pour water or hot liquids, such as gelatin, chocolate, or…

Project

3D Spur Gear

A spur gear is a common toothed wheel that works with other wheels in a set to adjust the speed, power, or direction of a complex machine. It's found in many everyday devices, such as electric screwdrivers, washing machines, and mechanical clocks…

Project

3D Terrain Map

Terrain maps are physical models that give you an at-a-glance overview of landforms. Architects, builders, and engineers often use these types of maps to provide context to proposed building designs. In this project, you'll create a layered…

Project

3x3x3 LED Cube

LEDs (light-emitting diodes) are rectifying semiconductor devices that convert electrical energy into electromagnetic radiation. You can use these devices to create a 3-dimensional light display. LED cubes require some care and good soldering skills…

Project

Arduino Oscilloscope

An oscilloscope is a device that allows you to see an electronic signal so that it appears as a waveform. Traditional oscilloscopes work by amplifying a signal to control the position of a dot on the y-axis (vertical axis) of a cathode-ray tube…

Project

Jumbo Foam Glider

This project takes you through the steps to build, launch, and fly a foam glider in sustained and controlled flight. Control in flight is achieved by modifying the wind the glider flies through with a large cardboard sheet (paddle). If this is your…

Project

Levitation Machine

This project allows you to use electromagnetic levitation to suspend a globe of the world above a surface. The "globe" is actually a table tennis ball painted to look like a globe. Keeping it in place requires careful control of electrical current…

Project

Light and Temperature Logger

Environmental research often involves the use of data loggers to record data at regular intervals over a period of time. Most data loggers are based on digital processors, and can be fairly expensive, but you can build your own. This project uses a…

Project

Pulse Generator Circuits

A pulse generator circuit is an important building block for many electronic projects, such as the heart of a digital clock. Its purpose is basically to switch an output on and off for as long as the circuit is activated. Sometimes, these circuits…

Project

Text-Controlled RGB LED

A red, green, and blue (RGB) light-emitting diode (LED) is a useful electronic component that can produce visible light in a variety of colors. This is done by varying the intensity of the light output of the three different color LED elements (red,…

Project

Tumblewing Walkalong Glider

This project takes you through the steps to build, launch,and fly a paper airplane (glider) in sustained and controlled flight. Control in flight is achieved by modifying the wind the glider flies through with a large cardboard sheet or foam board…

Project

Ultralight Foam Glider

This project takes you through the steps to build, launch, and fly an ultralight foam glider in sustained and controlled flight. Controlled flight is achieved by modifying the wind the glider flies through with a large cardboard sheet, or paddle.The…

Project

Wind Lantern

In this project, you will build a small, vertical-axis wind turbine, or VAWT for short. VAWTs are not as efficient as their horizontal-axis cousins, but they are better suited to urban environments where wind can come from different…

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from article Thermodynamic cycle

Comparison of principal thermodynamic cycles. Cycles are, in the order of decreasing efficiency, Carnot cycle (a-b-c-d-a), Brayton cycle (b-e-d-f-b), Diesel cycle (b-e-d-g-b), Otto cycle (b-h-d-g-b).

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from article Voltage measurement

Voltage–current characteristic of ideal Josephson junction.

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from article Voltage measurement

Simplified Josephson junction measuring system.

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from article Voltage measurement

Voltage–current characteristic of Josephson junction array.

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from article Voltage measurement

Reference circuit using an integrated reference amplifier. The resistor “set Iz” allows current Iz flowing through the Zener diode to be adjusted independently of the transistor current. The resistor TC allows the temperature coefficient of the…

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from article Voltage measurement

Achievement of a 10:1 resistance ratio by a series-parallel connection. The single resistor R is adjusted to be equal in value to the three resistors of value 3R connected in parallel. When all the resistors are reconnected in series, a ratio of…

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from article Voltage measurement

Thermal ac-dc converter system. The thermal converter receives the signal to be measured through relay contact A, and the input from the dc power supply through relay contact B.

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from article Voltage measurement

Two-stage inductive voltage divider transformer.

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from article Secondary ion mass spectrometry (SIMS)

Molecular depth profile of a 300-nm film of a mixture of the sugar trehalose and a small peptide (Gly-Gly-Tyr-Arg, GGYR) coated on a Si substrate. (Courtesy of J. Cheng and N. Winograd, 2005)

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from article Klystron

Cross section of cascade klystron amplifier. (Varian Associates)

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from article Klystron

Cavity concentrates electric field between the reentrant noses. As field varies sinusoidally with time, an electron crossing in the gap between the noses experiences an electric field whose strength and direction depend on the instantaneous phase of…

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from article Klystron

Bunching the electron stream. (a) As the electric field varies periodically, electrons traversing the cavity are speeded up or slowed down. (b) Distance-versus-time lines graph the gradual formation of bunches. (c) Current passing a fixed point…

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from article Klystron

Cutaway view of four-cavity amplifier. (Varian Associates)

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from article Klystron

Detail of input cavity for four-cavity klystron amplifier of Fig. 4. (Varian Associates)

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from article Klystron

Schematic cross section of reflex oscillator. (Varian Associates)

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from article Klystron

Trajectories show bunching in a reflex oscillator. Electrons are turned back by a retarding field, faster ones going farther and taking longer. The bunched beam returns through the cavity. (Varian Associates)

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from article Klystron

Cutaway of reflex oscillator shows (at left) the screw that deforms the flexible bottom wall of the cavity to change its resonant frequency. The beam passes through honeycomb grids in the cavity. The cathode leads come out at the bottom socket, and…

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from article Linkage (mechanism)

Four-bar linkage.

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from article Linkage (mechanism)

Equivalent of four-bar linkage.

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from article Linkage (mechanism)

Slider crank mechanism.

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from article Linkage (mechanism)

Scotch yoke.

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from article Linkage (mechanism)

Addition with a lever.

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from article Linkage (mechanism)

Pantograph.

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from article Differential transformer

Basic circuit of differential transformer.

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from article Differential transformer

Bourdon-tube pressure transducer employing a linear variable differential transformer (LVDT). (After E. E. Herceg, Handbook of Measurement and Control, Schaevitz Engineering, 1976)

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from article Differential transformer

Linear variable differential transformer (LVDT).

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from article Differential transformer

E-shaped differential transformer. (After P. J. O'Higgins, Basic Instrumentation, McGraw-Hill, 1966)

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from article Speech recognition

Basic block diagram of a speech recognition system.

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from article Speech recognition

Short-time spectral analysis of speech.

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from article Speech recognition

Three-state hidden Markov model.

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from article Speech recognition

Sentence representation of “show all alerts” with a finite state network using context-dependent units; “sil” denotes silence.

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from article Pyrometer

Elementary radiation pyrometer. (After D. M. Considine, ed., Process Instruments and Controls Handbook, McGraw-Hill, 1957)

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from article Pyrometer

Narrow-band pyrometer.

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from article Pyrometer

Radiation pyrometer. (Honeywell Inc.)

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from article Pyrometer

Optical pyrometer. (Leeds and Northrup Co.)

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from article Lactam

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from article Manufacturing engineering

Flow chart showing the components of the serial method of product production.

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from article Manufacturing engineering

Diagram showing the various elements of the concurrent design/concurrent engineering (CD/CE) process.

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from article Manufacturing engineering

Chart showing the cumulative percent of life-cycle cost of a product by individual phases of a product life cycle. Numbers represent the following phases: 1, define use patterns; 2, define alternatives; 3, develop alternatives; 4, freeze subsystems;…

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from article Steel

Steel structure. (Credit: Shutterstock/Tampo)

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from article Steel

Section of the iron-carbon phase diagram, where γ is austenite, α is ferrite, and Fe3C is cementite.

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from article Steel

Optical images showing (a) slow-cooled 0.2 wt% C steel consisting of ferrite (white) and pearlite (black), (b) slow-cooled 0.8 wt% C steel consisting of pearlite [note that the pearlitic structure of alternating ferrite (white) and cementite (black)…

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from article Steel

Continuous cooling transformation (CCT) diagram for a 0.8 wt% C steel. Microstructures that form at different cooling rates are (1) pearlite, (2) pearlite + bainite, (3) martensite.

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from article Steel

Effect of increasing the carbon content (and hence the pearlite amount) on the (a) strength and (b) ductility (elongation) of ferrite + pearlite steels.

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from article Steel

Effect of (a) carbon and (b) tempering temperature (1 h tempering) on the hardness of as-quenched martensite.

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from article Steel

Ductility (elongation) versus tensile-strength diagram for advanced high-strength steel grades. IF = interstitial free; Mild = mild steel; BH = bake hardened; C-Mn = carbon manganese; TRIP = transformation-induced plasticity; DP = dual-phase; CP =…

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from article Induction heating

Basic elements of induction heating.

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from article Induction heating

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from article Induction heating

Cross section of a typical induction melting furnace. (Inductotherm Corp.)

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from article Induction heating

A 1600-kW bar end heating system for feeding an automatic upsetter for forging flanges on automotive axles at a production rate of 720 per hour. (Westinghouse Electric Corp.)

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from article Inductor

Toroidal coil, a type of fixed inductor.

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from article Automotive suspension

Front-wheel-drive car with MacPherson-strut front suspension and strut-type independent rear suspension. (Saturn Corp.)

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from article Graphite

The graphite atomic arrangement down the c axis. There are two distinct layers of carbon atoms, related by symmetry. The first level consists of carbon atoms (solid circles) at the vertices of a network of hexagons. The second level, also a…

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from article Graphite

Graphite. (a) Earthy aggregate (American Museum of Natural History specimen). (b) Hexagonal crystal of graphite with triangular markings on face (after C. Palache, H. Berman, and C. Frondel, Dana's System of Mineralogy, vol. 1, 7th ed., John Wiley…

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from article Graphite

Graphite reflector for a test reactor.

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from article Graphite

Graphitizing furnace, for making synthetic graphite.

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from article Graphite

Young's modulus (Ec) shown as a function of the orientation q; 1 dyne/cm2 = 0.1 pascal. (After R. Bacon, Carbon fibers from rayon precursors, Chem. Phys. Carbon, 9:1–102, 1973)

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from article Graphite

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from article Microwave free-field standards

Microwave free-field calibration system.

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from article Microwave free-field standards

Guided-wave test facility based on Crawford transverse-electromagnetic (TEM) cell.

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from article Pebble mill

Diagrammatic sketch of a conical pebble mill.

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from article Spintronics

Simple GMR structure.

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from article Spintronics

Domain-wall “racetrack” memory device concept. To write bits into the racetrack shift register, current pulses move the domain walls in nearby wire, and fringing fields from the domain walls write bits. The magnetic tunneling junction (MTJ) sensor…

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from article Infrared lamp

Relative energy output of four incandescent lamps as a function of wavelength and filament temperature. As temperature increases, more of the lamp's energy shifts to shorter wavelengths. °F = (K × 1.8) − 460. (After Illuminating Engineering Society,…

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from article Infrared lamp

Typical shapes of infrared lamps. (a) R lamp, with built-in reflector unit. (b) Tubular configuration with a quartz bulb.

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from article Lean manufacturing

Restructuring of a job shop/flow shop final assembly design into a linked-cell manufacturing system.

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from article Lean manufacturing

Job shop portions of the factory require a system level conversion to redesign them into manufacturing cells.

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from article Lean manufacturing

Lean manufacturing cell for producing rack bars for a rack-and-pinion steering gear.

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from article Lean manufacturing

Linked-cell design. In the lean manufacturing system, the manufacturing and assembly cells are linked to the final assembly area by Kanban (card) inventory links or loops. WLK indicates a withdrawal card.

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from article Fuzzy sets and systems

Examples of fuzzy sets. (a) Fuzzy sets of age groups of high school children: young (A); not young (A); very young (B). (b) Typical triangular representations of fuzzy labels of temperature: less than 6°C [43°F] (A); about 15°C [59°F] (B); and about…

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from article Fuzzy sets and systems

Dynamic system with IF … THEN rules.

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from article Fuzzy sets and systems

Fuzzy logic controller using IF … THEN control rules. F = fuzzifier; DF = defuzzifier.

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from article Fuzzy sets and systems

Fuzzy control of a direct-current (dc) motor. (a) Elements of motor and controller. ω= motor angular speed, ωZ = reference angular speed, M(t) = disturbing moment, S = error sum, I(t) = motor current, U = control action. (b) Motor speed with fuzzy…

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from article Fuzzy sets and systems

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from article Strake

Strake and resulting vortex flow.

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from article Aerospace medicine

Astronaut Scott Kelly trains in a flight simulator of the Russian Soyuz spacecraft, which ferries human crews to and from the International Space Station (ISS). From 2015 to 2016, Kelly spent almost a year (340 days) in space, twice as long as a…

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from article Aerospace medicine

Astronaut Sandra Magnus exercises on the Treadmill Vibration Isolation and Stabilization (TVIS) in the Service Module aboard the International Space Station. (Credit: NASA)

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from article Switched capacitor circuit

Switched capacitor. (a) Basic circuit. (b) Equivalent resistive circuit.

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from article Switched capacitor circuit

Integrator circuits. (a) Conventional RC integrator circuit. (b) Single-input switched-capacitor integrator. (c) Switched-capacitor differential integrator circuit.

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from article Switched capacitor circuit

Steps in the realization of a switched-capacitor filter. (a) Low-pass prototype filter. (b) Corresponding band-pass filter. (c) Signal flow graph representation of the circuit of b. (d) Final switched-capacitor band-pass filter.

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from article Recycling technology

Recycling collection. (Credit: Getty Images)

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from article Recycling technology

Paper recycling plant. (Credit: Moodboard/Corbis)

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from article Recycling technology

Recycling wood pallets. (Credit: Stockphoto/Getty Images)

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from article Recycling technology

Life-cycle stages of electronics, including reuse and recycling. (Credit: U.S. EPA)

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from article Electric power substation

A typical transmission substation (345 kV).

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from article Electric power substation

View of a residential outdoor distribution substation with double-ended underground supply to transformers which are positioned at either end of the metal-clad switchgear.

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6,533 results

3D Floor Plan

3D Skull Candy Mold

3D Spur Gear

3D Terrain Map

3x3x3 LED Cube

Arduino Oscilloscope

Jumbo Foam Glider

Levitation Machine

Light and Temperature Logger

Pulse Generator Circuits

Text-Controlled RGB LED

Tumblewing Walkalong Glider

Ultralight Foam Glider

Wind Lantern

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