Simulates AC and DC circuits. Created by by Toon Van Hoecke at the Universiteit Gent. Try out small circuits and see response in Meters and Scope. Using the Java Applet Power.
Java 1.1 Physlets and the Circuitbuilder
It has a Oscilloscope and it pops up the oscilloscope window for your circuit tests.
Physlets or Physics Applets, are small flexible Java applets designed for science education.
Periodic table of the elements contains the basic data about the elements in five languages.
Periodic Table and other Calculators
Chemistry Assistant - scientific calculator for fast calculations of molecular weight, quadratic equations, chemicals for preparations of solutions and statistic analysis.
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| From Soldermans Basic Electronics |
EniG. Chemistry Assistant is an expression calculator for fast calculation of molecular weight of compounds by simple entry of chemical formula, and replaces the element symbols with their atomic weight. The program translates texts with chemical element symbols or without them into a mathematical expression and calculates them. The program includes functions for statistical analysis, solving the quadratic equation, physical constants, and prepare solution calculator
Periodic Table of the Elements - shows the change of the standard state of elements with the change of temeperature on 7 languages.
This site contains popular-science style articles describing many aspects of electrochemistry. New articles are added at irregular intervals, and all articles are periodically updated as recent developments occur in the field.
Materials-Science of which Chemical/Electrochemical Engineering is a part; is behind all the development of electronic components and manufacturing. The Backbone is Applied Science. A Super Capacitor or a Special RF Semiconductor can only be developed using the research and efforts of these scientists.
The Sciences or their study has been much nurtured and supported by some countries like the USA. This is the foundation on which many other Technologies like Electronics and Computing thrive. In many other countries this is many times not even perceived as its is not 'glamorous' and requires much efforts and dedication.
"If the Foundation of Applied Sciences is sound, the Building of Technology is Sturdy"
As said by -
Here are some resources of Science, i found useful.
Latest news on science, technology, hard science subjects of physics, space and earth science, electronics, nanotechnology and technology in general.
PhysOrg - science and tech news
Publishing around 100 articles every business day, PhysOrg offers the most comprehensive sci-tech news coverage on the web. PhysOrg exclusive feature stories are original and not found elsewhere on the web.
Physics and Physlets. Astronomy - planet, space weather, cosmos. Mathematics - algebra to statistics. Optics and electrical. Geophysics, Energy, Galileo.
Multimedia Physics - SchulPhysik
If you are in Astronomy or like building Telescopes, this page has some ideas on Motor control, Basic Electronics and remote radio telescopes.
Museums are virtual Universities. 3D Scaled Interactive Scientific and Engineering Demonstrations in Tech Museums Inspire, Educate and Train many students on Science and Technology Subjects.
Mike's Electric Stuff is an Online Electrical Vintage Tour, back in time.
Such Live Interactive Demonstrations may be very useful for Maths and Economics as well. These are Subtle and Complex Sciences which need Gross Manifests or Exhibits to help youngsters grasp Ideas and Concepts easily.
The Lead Acid Batteries are used in Automobiles and UPS - Uninterrupted Power Supplies. Battery Banks and Arrays are used in Home and Industrial Power Systems with Solar and Wind power charging too.
These batteries have survived many other types, for rugged high power usage, even beyond 100Kva. It is all the more important for us, to learn how to use them properly. Intelligent charge controllers and charge-discharge cycle regulating managers, will ensure a long lifespan for optimum cost-effective usage of this Electro-Chemical Wonder.
A home power station is what we all should try and build on our own, Make designs that are serviceable and maintainable. Solar Power, Waste Organic fuel Power, Even Pedal power Low cost Systems need to be designed.
On the other side, switch to low power Tablet PCs, even if the power of computation is less. Use Applications that use less resources, Switch to Open Source. A HandHeld PC should not take more than 12 watts on normal usage. Use Web Applications hosted on Green Servers, here the power of computation is shared.
The wastage of power in many companies are enormous on standby. Some have many systems turned on with hardly any usage, I have seen in an office a 300 W load of a computer; turned on for a whole week, for just sending a few mails and printing a few documents. Certainly the Telex machine was eco friendly and even the electronic typewriter was sensible.
A Green solution could be New Desktop Computing Standard - The quiescent losses in this is only the wifi server cube, which can serve 6 tablets or UMPC. So if 6-12 people are using computers, many desktops need not be on. Tablets, Laptops and Notebooks consume less power and run on batteries. Thin Custom Notebook and Tablet Clients can use one OpenOffice on the WiFi Application Server cube
This Website has Sufficient Data on Alternative Energy (electrical). Energy Conversion and Management and most important ... Batteries. Batteries are a bit expensive, they have a long life. If care is taken, they can last long. Any Energy Harvesting needs a Battery as an Electrical Flywheel. SuperCaps too act as buffers or large reservoirs.
Electropaedia - Energy Sources and Energy Storage, Battery and Energy Encyclopaedia and History of Technology
Electric power generation and energy supply technologies.
Presented in a Easy to understand, layman language. This Energy and Electrical Basics is a must for all who want to save power and lead a Green Lifestyle.
Undertand your Appliance and The Energy Supplier. The way electricity is generated and reaches your home.
CIPCO Energy Library - Electrical Study
A class in basic electricity and how the electric utility industry generates and delivers power to customers. Designed primarily for use by utility field representatives who need to understand electrical principles. - Fundamentals of Electricity Covers the subject of motors from an explanation of how they work, to the advantages/disadvantages of adjustable speed drives, see Motors & Drives section.
Complete descriptive information on closed- and open-loop geothermal heat pump systems. Residential, multifamily and commercial applications are all covered. - Geothermal Heat Pump Systems
"Some insects, like bees, can see light of shorter wavelengths than humans can see."
This is something to Buzz about. This chart is excellent, a Pictogram. A small image with a Graphical, Complete and Concise
expression of a Scientific Truth.
Electromagnetic Spectrum - Berkeley Lab
Radiation is energy that travels and spreads out as it goes-- visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays.....
Measuring the electromagnetic spectrum
Faraday cages are structures - as small as a shoebox or as big as a building - that protect what's inside from surrounding electromagnetic radiation (EM).
National High Magnetic Field Laboratory - Faraday Cage
Here is a Electromagnetic Spectrum Chart from Sura.org - Southeastern Universities Research Association.
An accelerometer is a device that measures non-gravitational accelerations. These are accelerations produced by mechanically accelerating the accelerometer via its casing. - Accelerometer Wikipedia
An accelerometer is a device which measures acceleration; how fast it's speeding up. In the past an accelerometer could be a complex, bulky piece of equipment, but in today's world, accelerometers are available as single ic's and use complex microscale machining technology.
The MMA7260Q is a 3-axis accelerometer
Tom Igoe - The MMA7260Q is a 3-axis accelerometer from Freescale Semiconductor.
Balancing robot needs gyroscope and accelerometer
ADXRS150 and ADXRS300 piezo-gyroscope integrated circuit, The gyro is very small at about 5mm square (about 0.3 inches square). You can see the small combo gyro PCB mounted vertically in the center section on the balancing robot
ADXL105 Lower-Noise Wider-Bandwidth Accelerometer
The ADXL105, a near-ideal kind of vibration sensor, eliminates significant problems with existing vibration sensors, such as piezoelectric and bulk capacitive sensors. Primary benefits derive from much lower cost, stable sensitivity as a function of frequency and temperature, ruggedness, and ease of use. Besides machine health and condition monitoring, it is particularly well suited for noise and vibration cancellation applications.
AccelR8 is a device for measuring acceleration
AccelR8 is a device for measuring acceleration. It can measure +/- 2 g. As it contains a microprocessor, it an also measure time.
A beginner's guide to accelerometers
By measuring the amount of static acceleration due to gravity, you can find out the angle the device is tilted at with respect to the earth. By sensing the amount of dynamic acceleration, you can analyze the way the device is moving.
Society of Robots' tilt to servo control app
How does it work? Inside an accelerator MEMS device are tiny micro-structures that bend due to momentum and gravity. When it experiences any form of acceleration, these tiny structures bend by an equivelent amount which can be electrically detected
David T.'s motor balancing experiments
Using an oscilloscope to measure AC vibration signals generated by an accelerometer (from Dimension Engineering).
These books Electricity and Magnetism, Optics and The Modern Revolution in Physics are very useful for any student of electronics. To have sound science foundation, Physics and Chemistry are very important for an Electrical/Electronics Student.
Biology and Environment learning is important for the Analytical and Medical Equipment designer. Chemistry is important for the study of materials which enable us to make new components and semiconductors. Maths cannot be ignored, it needs no special mention. Numbers are everywhere, this is the most important part of science.
Electricity and Magnetism Optics The Modern Revolution in Physics
Light and Matter: open-source physics textbooks
Electricity is Shockingly Simple
Our Nervous System works on a Electrochemical Electricity. Brain is an Organic Chemical Computer. The Thunderbolt is just an overgrown electric spark. You know the shocking facts about the electric eel. Underwater creatures can illuminate themselves, could be like OLED.
All your Home and Office runs on electrons. Electric cars are already a reality. This page will charge you with Electrical Facts you ought to know.
See the electric eel too.
Electricity Posters - Education - National Physical Laboratory
WikiCiencia - Science and Tech Portal
Devoted to electronics and computing. Featured articles
Control Systems - What are the control systems, Types of automation. Solar Cells - Photovoltaic or photoelectric cells. Operation of semiconductor PN junction.
Includes collaborative wiki on subjects like Semiconductors, Communications, Electricity.
Just like Rohde and Schwarz which is a world leader in Communications Test Equipment, There was another from Germany called Wandel and Goltermann which made specialized RF Test Instruments.
A short history is Wandel and Goltermann became Wavetek Wandel Goltermann (WWG) and then Acterna, Now it is a part of JDSU Communications Test & Measurement.
See also Willtek Company History
Here are scans of a old catalog of Wandel and Goltermann.
Wandel and Goltermann
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| From Electronic Catalogs |
Brief Introduction of WG
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| From Electronic Catalogs |
To make an analog design using log amps or multipliers, discovercircuits - four-quad is good for learning. Using a uP for math is better. Look at these links below. Build a Power Meter ! The Metrics for Going Green is with a Energy/Power/Watt meter.
Related Reading
Watlow - Reference Data
Watlow reference data provides information for amperage conversions, thermocouple types, RTD tolerances and more.
Watlow Ltd- Reference - Guides and Tutorials
Watlow is the leader in engineering and manufacturing custom commercial electric heaters. ...offer electric heating elements, industrial heaters...
Here is a Page from an Old Watlow Catalog i have.
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| From Electronic Catalogs |
The Classic Ohm's Law Calculator - it is now Interactive.
When a product has to be made small, the board real estate is limited or it has to be manufactured in large numbers.... SoC is the Answer. A Microprocessor evolved into a Microcontroller by packing many external chips into one chip. Now uC Card along with the other blocks like A-D, Port Drivers, Networking elements, Display Driver and other peripherals can be packed into one chip.
Some Power Supply and RF blocks cannot be easily added inside as they have a silicon processing more specific to their applications. Laser trimmed Instrumentation Op-Amps, high accuracy resistor arrays, high value capacitors, magnetics and supporting chips are placed outside on the PCB.
The SOC can pack Digital Chips, Memory, A/D, D/A converters, uC, RAM and Custom programmable areas. For more specialized communications, analog and power requirements; Special SoC types can tackle RF and Power management within a chip because of proprietary silicon processing expertise.
Programmable SoC offers an alternative to custom ASIC as you can make different products from the same chip, yet make products that are portable and low power. The software, pcb, user interface and support components has to be redesigned for every unique product. Many standard IPs are available for Design and Reuse.
Some of the early Philips (nxp) 8031 variations had integrated a lot of outer chips like A/D, D/A display driver etc. This made Programmable Industrial Instruments/Gadgets possible with just a few external components. Now many variations are available from chip manufacturers, with more speed, memory and peripherals inside. Futuristic gadgets may be intelligent, interactive, networked and portable. The SoC chip makes it all possible, by integrating all product functions within it except the user interface.
SoC with a Color LCD driver, Wi-Fi, USB, RAM and Flash capabilities....at last you have a Computer in a Chip. Better still Web-Chip.
