Parallax’s Stamps In Class™  

Category: Start / OnLine Education
Parallax’s Stamps In Class™ program was started in 1997. Until that time there were very few educational resources that addressed the needs of the high school age electronic student.

Our comprehensive Stamps In Class curriculum is designed to introduce students and educators to BASIC Stamp microcontrollers using software basics and simple hardware, integrating the two without a tremendous investment (the curriculum is free and Parallax has educational prices for the hardware). It starts from the bottom, with hands-on projects and programming, and works it’s way up to more advanced programming and Industrial Control.

They currently have educational downloads available in English, Espanol, Deutsch, Francais, Italiano, Nihingo, and Turkic.

Parallax will provide free hardware to individuals who can professionally translate our documentation to other languages. For more information on how to qualify, visit our Translators Forum. If you are interested in translating our documentation, please contact aalvarez@parallax.com.

Note Regarding Teacher\'s Guides: Available Teacher\'s Guides are posted in the ParallaxEducators discussion group. To be admitted to the ParallaxEducators discussion group, please contact stampsinclass@parallax.com for directions to subscribe. The Teacher\'s Guides and other valuable educational resources are available exclusively through this group and are not available directly from Parallax technical support or customer service. Are you an educator? Click here to register.
Added on: 20-May-2005 | hits: 4548
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Free Flow Calculators & Software  

Category: Start / Calculators / Fluids & Fluid Flow Calculators
From: Flowmeterdirectory.com, the most comprehensive web portal on flowmeter technology. Includes:

Flow Calculator--Enter Pipe Diameter and Velocity, get Volumes Flow in several different unit systems
Reynolds Number Calculator
Venturi Calculator
Orifice Plate Calculator
Open Channel Calculator
Flow Converter for Palm PDA
Flow Rate Calculator for PC & POCKET PC
Reynolds Number Free Calculator for PC & POCKET PC
Venturi Tube Free Calculator
Added on: 04-Apr-2006 | hits: 2692
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Flow Calculators & Software  

Category: Start / Calculators / Fluids & Fluid Flow Calculators
Free Flow calculators and calculation software on flowmeterdirectory.com to include:

Flow Calculator, Reynolds number Calculator, Venturi Calculator, Orifice Plate Calculator, Open Channel Calculator, Flow Converter, Flow Rate Calculator (PC VERSION and POCKET PC VERSION) Reynolds Number Free Calculator (PC VERSION and POCKET PC VERSION) and Venturi Tube Free Calculator.
Added on: 25-May-2006 | hits: 1892
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Fluids Calculators  

Category: Start / Calculators / Fluids & Fluid Flow Calculators
From PumpUniversity.com unit converters and formulas that are applicable on pumps and liquid flow situations.

Conversion calculators

Bernoulli\'s Equation, Dynamic Viscosity, Energy, Energy Calculation, Flow, Force, Hardness Table, Kinematic Viscosity, Length, Linear Velocity, Momentum Equation, Newton Viscosity, Plane Angle, Power, Pressure, Radial Forces, Surface, Temperature, Time, Torque, Valuta, Viscosity, Voltage Table, Volume and Weight.

Formula calculators

Affinity laws calculation, Calculate the capacity of your tank, Calculations for magnetic gear pumps, Dynamic head calculation, Flooded suction NPSHA, Hydraulic Power Calculation, Hydrostatic pressure calculation, Impeller tip speed calculation, Kinetic Energy calculation, Major loss calculation for fluid flow using Darcy-Weisbach, Noise Emission, Orifice sizing calculation, Pipeline velocity calculation, Pressure drop across a valve and flow rate through that valve SI units, Sizing valves for gases and vapours, Specific Grafity calculation, Specific speed calculation, Suction lift NPSHA, Suction specific speed calculation, Torque Calculation, Waterhammer calculation
Added on: 07-Mar-2005 | hits: 1774
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efunda's Calculators  

Category: Start / Calculators
The engineering fundamentals website (www.efunda.com) has a great resource in calculators. These include:

Financial Calculators

Loan Calculator
This calculator takes any two of the three variables (Loan, Interest Rate, and Number of months) and gives the answer for the remaining one. Lease Calculator Leasing a car? Confused about the money factor that car dealers always mention? We have a mathematical proof that relates money factor to the actual interest rate.

APR Calculator
So what is the difference between APR and the Interest Rate? This calculator gives a full definition of APR and helps you determine it for a given interest rate and points cost.

Currency Calculator
Updated daily, this calculator gives the extrange rates of more than 60 currencies and converts from one to another.

Engineering Design Aids

Unit Conversion Calculator
Featuring more than 800 units in our database (and growing), we give the unit definition and SI-dimensions in addition to converting from one unit to other units in the same family.

Fraction Calculator
Design engineers, ever wonder what the closest 32nd number is for a decimal fraction? This calculator tells you where your decimal fraction stands on the 1/8, 1/16, 1/32, and 1/64 scales.

Gage Calculator
There are so many systems for gaging wires and sheets. This calculator allows you to convert back and forth between gages and the actual decimal numbers in different standards.

O-Ring Calculator
This calculator outputs the O-Ring inner diameter and the range of O-Ring cross-section diameters that will meet user prescribed limits on groove and bore diameters and O-Ring compression.

Spring Calculators
Frustrated by reading spring catalogs trying to figure out which spring gives you the right force or displacement? Maybe one of these 8 calculators can help you. More calculators will be added soon! Hardness Approx. Converter This calculator explains and inter-converts comomonly used hardness scales, including Brinell, Knoop, Mohs, Rockwell, Shore, and Vickers.

Mechanical Formulas

Beam Calculators
Featuring 11 calculators that output the displacement, rotation, force, moment, and shear for beams with different boundary conditions under various loadings.

SDOF Vibration
This calculator returns the natural frquencies, damping ratio, and the closed-form solution for a Single-Degree-Of-Freedom mass-spring-damper system.

Reynolds Number
This calculator quickly gives you the Reynolds Number for a flow over a plate or a flow in a pipe.

Venturi Flowmeter
This calculator outputs the flowrate through a venturi constriction for a given pressure drop.

Pipe Friction
Frustrated by using the Moody Chart to calculate pressure loss in pipes? This calculator does it for you and tells you the Reynolds number, pressure drop, and flow rate for a constant cross-section pipe.

Radiation
Ever wonder how much heat per second is radiated from your (bald) head to the dark night sky if you are standing in an open field? You can use this calculator to figure that out! (Hint: It\'s about 10 watts if you are really bald!)

Laminar Flow Over Plate
Heat convection by forced laminar flow over an isothermal plate.

Stress Transforms
Remember Mohr\'s Circle? We provide calculators that execute the math behind Mohr\'s Circle for the cases of Plane Stress and Plane Strain.

Principal Stress
Need to find the principal stresses and their directions for a given input stress state? These calculators do the math for you for the case of Plane Stress and Plane Strain.

Elastic Constants
OK, we all remember that an isotropic material requires only 2 elastic constants to describe its material behavior. But which 2 constants to use? Youngs modulus, Poisson ratio, shear modulus, or bulk modulus? Don\'t sweat it anymore - this calculator allows you to convert from any 2 constants to all others in common use.

Failure Criteria
Remember how to apply von Mises and the Maximum Shear criteria to evaluate failure risk? How about Maximum Stress or Mohr\'s Theory? We encourage you to freshen up on the basics, but short of that here are 2 calculators for applying failure criteria to brittle and ductile materials.

Plate Calculators
Featuring 11 calculators that output the maximum displacement and stress for common plates with different boundary conditions under various loadings.

Composite Materials
3 calculators are provided to help determine the mechanical properties of the composite lamination with multiple layers.

First, the equivalent material constants of a single layer along the principal directions are estimated.
Then, the stiffness and compliance matrices of such a layer are constructed.
Finally, the laminae are \'glued\' together and the stiffness matrices A, B, and D of the laminate are built.

Pure Mathematics

Base-N Conversions
Converts integers expressed in one base to all other bases, up to base 36.

Gamma Function
This calculator evaluates the Gamma Function for a given argument. We don\'t know how useful this is, but then again, it is cool!

Gaussian Quadratures
Gauss-Legendre
Gauss-Hermite
Gauss-Laguerre
These calculators output the abscissas and weights used in Gaussian quadrature (a numerical integration technique).
Added on: 03-Mar-2005 | hits: 1633
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Calculator.com  

Category: Start / Calculators
Calculator.com was founded in January of 1996 to create a new class of research and information products in the form of online calculators. It is the leading online calculator portal with calculators spanning over 120 categories and sub-categories. All of their calculators are specific to something that someone is interested in. Apart from two calculators, a general scientific and a general numeric calculator, all pinpoint the user’s interest by definition. Examples: o Tiling a floor o Brewing beer o Cooking o Mortgages o Investments Calculators are available in the following areas: Agricultural Automobile Brewing Clothing College Computing Converters Cooking Design Distance Engineering&Finance Fun Health Manufacturing Numeric Personal Photography Pricing Scientific Sports Time
Added on: 03-Mar-2005 | hits: 1617
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Process Instruments and Signal Conditioners  

Category: Start / Vendors
Acromag offers a wide range of signal conditioners and fieldbus control network solutions. Select from hundreds of products to meet your exact requirements.
Added on: 21-Jun-2005 | hits: 1486
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SST Sensing Ltd  

Category: Start / Vendors / Level Sensors
SST Sensing Ltd have been providing robust and reliable Sensing and Control products to industry for nearly 10 years. They offer a standard range of Liquid Level, Gas, Speed and Position Sensors. Each product category includes an extensive range of sensors with a variety of housings, electronic configurations, signal conditioning, and termination.

Design/Customisation Service - Where a specific solution is required, SST will identify the suitable technology and use this as a building block to provide a bespoke customer solution.

SST Sensing Ltd, Unit B Europark Reema Road
Bellshill, Lanarkshire, ML4 1RR
Scotland, UK

T: +44 (0) 1698 740640
F: +44 (0) 1698 740280
E: info [at] sstsensing.com
W: www.sstsensing.com

Added on: 09-Sep-2009 | hits: 1364
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The NVLAP Directory of Accredited Laboratories  

Category: Start / Calibration Practices
This directory was last updated on January 5, 2010. New and updated scopes of accreditation are posted monthly. Users of this directory who are considering selection of an accredited laboratory should be aware of the effective dates of the accreditation and verify that the laboratory has retained its accreditation at the time its services are to be provided.

The NVLAP Directory of Accredited Laboratories is fully searchable, using Google Search.

Calibration Laboratories

* Dimensional
* Electromagnetics - DC Low Frequency
* Electromagnetics - RF/Microwave
* Ionizing Radiation
* Mechanical
* Optical Radiation
* Thermodynamic
* Time and Frequency

Chemical Calibration

* Chemical Calibration: Certifiers of Spectrophotometric NTRMs

Dosimetry

* Ionizing Radiation Dosimetry

Electromagnetic Compatibility and Telecommunications

* Electromagnetic Compatibility & Telecommunications

Environmental

* Asbestos Fiber Analysis (PLM Test Method)
* Asbestos Fiber Analysis (TEM Test Method)

Fasteners & Metals Group

* Fasteners & Metals Program

Information Technology Security Testing

* Common Criteria Testing
* Cryptographic and Security Testing

Personal Body Armor

* Personal Body Armor

Product Testing

* Acoustical Testing Services
* Carpet and Carpet Cushion
* Commercial Products Testing
* Construction Materials Testing
* Efficiency of Electric Motors
* Energy Efficient Lighting Products
* Thermal Insulation Materials
* Wood Based Products

Voting System Testing

* Voting System Testing

Added on: 17-Jan-2010 | hits: 1354
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Filmetrics for thin-film measurements  

Category: Start / Vendors / Dimension Devices and Gauges / Thickness
Filmetrics, Inc. was founded in 1995 with the mission of making thin-film measurements simple and affordable. Prior to our arrival, commercial thin-film measurement instruments cost $50,000 or more and required operators to have advanced training. Single measurements took several minutes, even hours.

The Filmetrics approach was to design an affordable purpose-built miniature spectrometer system, whose low cost had just recently been made possible by advances in silicon detector array technology. We combined this with sophisticated software that integrated advanced thin-film expertise into a simple, intuitive Windows interface. The result was the F20, a compact system with astounding speed and accuracy, which line operators could be trained to use in a matter of minutes - all at a mere fraction of the cost of traditional instruments.

U.S. offices: 858-573-9300, 6am-6pm PT.
Added on: 09-Sep-2009 | hits: 1313
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ThomasNet  

Category: Start / Vendors
A free product/service sourcing website powered by the Thomas Register. It is self-described as: the most trusted and comprehensive Measuring Devices directory on the Internet. A broad range of Measuring Devices resources are compiled in this industrial portal which proves information on manufacturers, distributors and service companies in the Measuring Devices industry. In addition, it links to related Categories: Measuring Devices (Contract Manufacturing), Instruments: Measuring, Gages: Measuring, Machinery: Measuring, Tapes: Measuring, Tools: Measuring, Microscopes: Measuring, Wheels: Measuring, Software: Measuring, Cups: Measuring all within the ThomasNet website.
Added on: 06-Oct-2005 | hits: 1284
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GESensing  

Category: Start / Vendors
GE Infrastructure Sensing Technology: From precision-chilled mirror primary technology to advanced polymer and oxide-based humidity technology, GE Infrastructure Sensing offers humidity sensing from -90 °C to +20 °C dew point range to 0- 100% relative humidity. It is one of the few companies converting raw silicon into finished products by employing techniques such as micromachining. The temperature sensors provide measurement and sensing products including high temperature thermistors, gauge drivers, and sensors. It also provides a variety of accurate, maintenance-free ultrasonic flowmeters that can take reliable measurements in a very wide range of pipe sizes and flow conditions Products organized by technology include sensors for:Pressure, Temperature, Humidity, Gas, Flow, Infrared, Moisture and Electrical. Services include both “Mail-In” and “Field Dispatch” service options. Mail-In service is provided through “Center of Excellence” and field service is handled by highly trained and skilled service engineers. GE also offers many services for installation, training and rental.
Added on: 23-Feb-2005 | hits: 1264
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CostMate™ - Injection Molding Part Cost Estimator  

Category: Start / Calculators
From The Plastics Web at iDEAS (www.ides.com). IDES is a plastic materials information company with a vertical search engine for the plastics industry.

IDES Inc.
209 Grand Avenue.
Laramie, WY 82070 USA

Phone: 800-788-4668 or 307-742-9227.
Fax: 307-745-9339
Added on: 03-Jan-2006 | hits: 1196
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EESIFLO Flow Calculators  

Category: Start / Calculators / Fluids & Fluid Flow Calculators
Simple Velocity to Volumetric Conversions--Downloadable and FREE!--- flow_calc.zip (4.62MB)--(Win 98/Me/2000/XP)

Enter Pipe Diameter in mm or inches, Enter Velocity in f/s m/s inches/s or cm/s, then Calculate Volume flow in cubic feet, US gallons, Imperial gallons, cubic meters, UK Barrels, US Liquid Barrels, US Oil Barrels and US Federal Barrels.

Also offer Reynolds Number Calculator, Absolute and Kinematic Viscosity Conversion Calculator and Density Unit Converter. All in PC and Pocket PC formats!
Added on: 05-May-2006 | hits: 1187
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SICK MAIHAK FLOWSIC 600 Ultrasonic Gas Flowmeter  

Category: Start / Vendors / Flow Meters
SICK MAIHAK offers the FLOWSIC 600 Ultrasonic Gas Flowmeter measures the actual volumetric flow rate, actual accumulated volume, gas velocity or velocity of sound in gases with high measurement acuraccy also over wide measuring ranges. It is ideal for flows with high dynamics. Designed for bi-directional mounting in pipelines up to DN 600 (24 inch) and pressures up to 100 bar (1,480 psi) without pressure lost and influence on the flow. Its low energy consumption allows operation with solar energy.
Added on: 29-Jan-2005 | hits: 1170
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Using Pressure Sensor and Flowmeter  

Category: Start / Measurements-Using Measurement Devices
Using a transducer and a flowmeter to determine slurry flow rate and POU filter life, By Michael S. Wang, published at the Micromagazine.com website. The Abstract reads: Because slurry can clog up a filter quickly, a system combining a prefilter pressure transducer and a flowmeter has been devised that can determine filter life and avoid process interruptions. This article focuses on slurry polishing of semiconductor wafers.
Added on: 23-Mar-2005 | hits: 1169
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Intersil App Notes  

Category: Start / Devices / Data Loggers, Signal Conditioners & Recording
Intersil's Applications Notes are broken down as follows:

Amplifiers / Buffers
Battery Management
Broadband
Communications ICs
Data Converters Digital ICs
Digitally Controlled Potentiometers (DCPs)
Display ICs
Hot Plug Controllers
Interface ICs
LNB Controllers Military / Space
Other
Power MOSFET Drivers
Power Supply Support
Special Analog Switches / MUXes / Crosspoints Switching Regulation
Timing Circuits Video ICs
Voltage Reference
Added on: 21-Feb-2006 | hits: 1162
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KROHNE, The Level and Flow Company  

Category: Start / Vendors / Flow Meters
ROHNE offer a complete range of flow and level products. They produce measuring instruments precision, reliabile and dependable units. Their flow products include: Volumetric flow devices (-e.g. Variable Area Flowmeters-, Electromagnetic Flowmeters-, Ultrasonic Flowmeters-, Vortex Flowmeters ) and Mass flow devices (e.g. Straight-tube Coriolis Flowmeters ,3rd Generation, and Low Flow Coriolis Flowmeter). Their Level Products include: Level radar, non-contact, TDR, contact guided microwave, Mechanical level gauges, Flap indicators and Floats.

They also make flow switches and gauges based on vibration and capacitance. and flow controllers.
Added on: 30-Nov-2004 | hits: 1157
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Crossbow Technology  

Category: Start / Vendors / Mapping, Surveying and Location
Crossbow Technology is a leading supplier of inertial sensor systems for aviation, land, and marine applications and other instrumentation sensors as well as the leading full solutions supplier in the wireless sensor networking arena and the only manufacturer of smart dust wireless sensors.

Crossbow has for years been at the forefront of creating and deploying smaller, smarter, wireless sensing devices and mesh networking platforms for large scale defense, environmental, agricultural, industrial monitoring and control, building automation, security and asset tracking applications.

Crossbow’s open architecture, TinyOS-based platform, enables highly intelligent multi-sensing devices to dynamically and reliably self-organize to efficiently capture and send detailed physical data anywhere, anytime. This transformation in how and where we are able to gather ever more specific physical information has profoundly affected how sensors are used and the types of data that are possible to gather.
Added on: 23-Mar-2005 | hits: 1152
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ATAGO Refractometers  

Category: Start / Vendors / Optical Instruments / Reflectometers
ATAGO has been the leader in refractometer technology for over 69 years. The history of Refractometers began with a basic model – a simple analog instrument. Today, refractometers are highly sophisticated due to the advancement of technology and the incorporation of high precision electronics into a refractometer.

Located in Bellevue, Washington in the heart of the thriving Great Northwest, ATAGO U.S.A., Inc. is now in a better position to provide technical and sales support to all our valued distributors and end-users. ATAGO U.S.A., Inc. is committed to working more directly with distributors, responding quickly and efficiently to every customer inquiry, and comprehensively researching our dynamic market place. Information collected will be used in pursuit of the future development of scientific instruments to the benefit of industries and people around the world.

ATAGO CO.,LTD
32-10 Honcho, Itabashi-ku
Tokyo 173-0001, Japan

TEL : + 81 3-3964-6156
FAX : + 81 3-3964-6137
E-mail : overseas [at] atago.net

ATAGO U.S.A., Inc.
12011 NE First Street, Bldg. C, Suite 110
Bellevue, WA 98005 U.S.A.

TEL : +1 425-637-2107
FAX : +1 425-637-2110
E-mail: customerservice [at] atago-usa.com

Web: www.atago.net/USA/index.html

Added on: 02-Mar-2009 | hits: 1152
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THz Transmitter/Receiver Opto-Mechanical Module  

Category: Start / Vendors / Spectrometers / Terahertz
The Thorlabs FRU Terahertz (THz) module is a kit that contains opto-mechanical parts for housing a terahertz (THz) transmitter or receiver chip and a silica lens. The chip and lens are not included in the module.

Thorlabs - Newton, New Jersey
435 Route 206 North
Newton, NJ 07860 USA

Tel: +1 973-579-7227
Fax: +1 973-300-3600
Email: sales@thorlabs.com

Added on: 17-Nov-2008 | hits: 1150
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Seeing Statistics  

Category: Start / Software / Free Engineering & Science Software
An online Webbook that addresses the differing learning styles of today's students. It presents the dynamic, visual nature of statistical concepts using interactive and engaging methods based on years of cognitive research and experience. SEEING STATISTICS uses over 150 Java Applets to create an intuitive learning environment and is surrounded by relevant links to examples, exercises, definitions, and search/navigation capabilities. A handbook accompanies SEEING STATISTICS which contains a password, navigation and exercises.
Added on: 15-Jul-2005 | hits: 1134
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Thread Sizes Calc.  

Category: Start / Calculators
A free program from the Fred V. Fowler Company For Calculating Thread Sizes. It is in zipped format and has a download size of about 454Kb.
Added on: 09-Mar-2005 | hits: 1128
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APM Automation Solutions Level Measurement  

Category: Start / Vendors / Level Sensors
Privately held APM Automation Solutions Ltd. has received worldwide recognition for its technologically innovative, effective and economical line of non-contact level measurement devices. The company’s APM 3DLevelScanner™ represents a new family of devices that takes the guesswork out of measuring the level, volume and mass of materials inside a silo or open bin with 3D mapping of the contents.

Princo Instruments, Inc. 1020 Industrial Boulevard Southampton , PA 18966 USA

Tel: +1 215 355 1500
Fax: +1 215 355 7766
Toll Free: 800 221 9237
Web: www.princolevelcontrols.com
Email: info@ [at] rincoinstruments.com

APM Automation Solutions Ltd. 24 Habarzel Street Tel-Aviv 69710, Israel

Tel: +972 3 6488891
Fax: +972 3 6488892
Email: Info [at] apm-solutions.com

Added on: 24-Sep-2009 | hits: 1123
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AMETEK Automation & Process Technologies  

Category: Start / Vendors / Level Sensors
About AMETEK Automation & Process Technologies is a unit of AMETEK, Inc. and a leader in level-measurement instrumentation. AMETEK, Inc. is a leading global manufacturer of electronic instruments and electric motors with annualized sales of more than $1.4 billion.

For more information on the Series 7330 Pro-Stik II continuous level sensor, contact:

AMETEK Automation & Process Technologies
1080 N. Crooks Road
Clawson, MI 48017 USA

Tel: 800-635-0289
Fax: 248-435-8120
Web: www.ametekapt.com
Added on: 10-Mar-2006 | hits: 1121
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