The My Delta Pi webstore
Main page: www.mydeltapi.com
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The My Delta Pi webstore
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Main page: www.mydeltapi.com
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Hobby Electronic Equipment
Welcome to this presentation of electronic equipment. Please click at the banners or product links to read more, buy or browse an even bigger collection of products than that presented at this page.
Equipment for electronic games
Electronic circuit and circuit kits
At the bottom of this page there is some information about resistors, capacitators and inductors.
Equipment for electronic games
GameSharkStore - Affordable game accessories - All types of equipment for all game-play consoles or bases, like contollers, wheels, joysticks, cables and faceplates.
Game equipment product examples
Here are some examples of products you can find in the store. By clicking at any product link you can browse for many other similar products.
Electronic Circuit and Circuit kits
Electronic circuits and kits to make special circuits, like speed controllers, amplifiers, light effects, measurements and analysis, displays, counters, telefones, detectors and more. You find a lot of products presented, but by clicking at any product link you get into a greater store where you can find much more of the same things.
Good stores of electronic circuit and circuit kits
HobbyTron - By clicking at this link, you will find all types of electronic components for hobby use and for professional use in laboratories. You will find electronic sets that can be used to build a lot of sevices and circuits. There are kits for building or installing specific electronic devices like power supplies, wave and pulse generators, measure devices, detectors, alarms, light effect generators, radio resceivers and transmitters and a lot more. You will also find specific components of every kind singly or in bulk.
Electronics circuits, kits and components
- please click here
You will find electronic components or material of every sort in bulk or single: NTE electronic parts, capasitators, dials, knobs, diodes, relays, resistors, potetiomenters, semiconductors of every kind, transistors, diodes, thyristors, speaker wires, trimmers, hook up wire, wire ties, Heat Shrinkable Tubing - Thin Wall Polyoefin -2:1 Per Package-48in, Heat Shrinkable Tubing - Thin Wall Polyoefin -2:1 Per Package-6in, Heat Shrinkable Tubing - Dual Wall Polyoefin w/Adhesive-3:1 Per Package-6in.
Power supply
and speed controller kits
Examples of amplifier kits
Examples of light effect sets
Electronic measuring and analyse device sets
Other specific
electronic kits
Some other good stores for electronic equipment for hobby and laboratory use
Welcome to this online store where you can buy hobby electronic construction kits or components for hobby electronics for a better prize than in the local stores, or find electronic components and building kits you do not find locally. Pleace click om a link to learn more or to buy. The presented products are only some of the products you can find by clicking at a link.
At the bottom of this page there is some information about resitsors, capacitators and inductors.
Dyscern - electronic devices for exceptional law prices - Dyscern specializes in portable consumer electronics, especially high class electronic devices. By working with predominantly refurbished items, we are able to offer exceptional prices. We sell a cross section of products including MP3 players, iPods, HDTV’s, Computer Systems, Nintendo Wii, Xbox 360 and more. Our products tend to be higher ticket items, but sold for an affordable prize.
WEB HOSTING AND INTERNET SERVICES
There are many good web hosting services in the market, and many of them price their services at an affordable rate. They differ however according to what modalities that are including in the basic packages and how they are prizing extra modalities or finesses. They may also have restrictions on what types of web-sites they will host. Therefore it is necessary to look at more than just one web-host before one decides which to use. It is also wise not to lay all websites one owns at the same host of security reasons, because any-web host can experience a major brake-down, even the very best and most expensive ones. Through these banners you get into the offers of four good web-hosts. Plese look at them and decide which of them you want to use for your special needs.
DIGITAL CAMERAS AND CAMCORDERS
Quality digital cameras and equipment for good prizes:
From Digital Concepts, Hewlett-Packard, Nikon, Olympus, Panasonic, Pentax, Samsung, Sony, Casio, Digital Blue, Disney, FujiFilm, Girl Gear, Hallo Kitty, Rollei, Sakar, Sealife, Sigma, Spy Chix, VuPoints
All types of camera accessories: Digital SLR, Compact
Cameras, Digital Picture Frames, Camera & Printer Kits, Lenses, Memory,
Batteries, Bags & Cases, Filters, Tripods, Flashes, Tutorials, Studio Lighting,
Docking Stations, Software. Free shipping and no sales tax. Please click at this
banner to exactly the camera or equipment you want.
CONSUMER ELECTRONICS AND ACCESSORIES
Consumer electronics: Computers, Televisions, DVD Players / Recorders, Home Audio / Video, MP3 Players / iPod Accessories, Satellite Radio, Headphones, Mobile Audio / Video, GPS / Navigation, Home Electronics, Telephones & Fax, Personal Electronics, Electronic Accessories
Accessories for all types of laptop equipment from all brands and for all models for good prizes: Examples: Laptop Batteries, PDA Batteries, MP3 Batteries, Digital. Camera Batteries, Camcorder Batteries, Universal Batteries, AC Adapters, Car Adapters, Airplane Adapters, Universal. Adapters, Printer Power Supplies, Chargers. GPS Receivers, Sync Cords, Fiber Optic Cables, HDMI. Cables, DC-DC Plugs • RPTV Lamps, Projector Lamps, iPod Accessories, MP3 Accessories, PDA Accessories. And more.
INKJET CARTRIGES, MEMORY MEDIA AND PRINTER EQUIPMENT
123InkJets
: Here you can find inkjet cartridges for good prizes to most ink printers of most brands, examples: A Top , Addmaster, Addressease, Adler/Royal, Advanced Hi-Tech, Agfa, Aitell, Amstrad, Apollo, Apple, Asker Intl, B Top, BDT, Bezier, Brother, Bryce Office Systems, Business Sys, Intl, C Top, Calcomp, Canon, Casio, Chinon, Citizen, Colossal Graphics, Commodore, Compaq, Comtech, Comterm, Costar, Craig Assoc, D Top, Daewoo, Data General, Datamega and meny more.You also find other accessories like: Laser toner, ribbons, solid ink, blank CD/DVD, scrapbooking and cables
SECURITY SOLUTIONS FOR YOUR COMPUTING
Panda Software security solutions
- In this shop private persons and companies find all solutions for their computer and internet security needs, and guidelines for choosing the right product.
MENU OF PRODUCT EXAMPLES
Internet and mobile telephone products
Power supply kits - please scroll down
Amplifier kits - please scroll down
Light organs, psychedelic lights and light effect sets - please scroll down
For measuring and analyzer set - please scroll down
Specific electronic equipment building or installation kits - please scroll down
Photo, camcorders, video cameras
Electronic transmitters and transmitter kits, please click here
General elctronic kits
Alarm kits and security electronics
Desktop and notebook computers
MP3-players and devices with MP3 capabilities
INFORMATION RESOURCES
About resistors, capacitators and inductors, please scroll downSome important internet services presented
About digital cameras of all kinds
HOBBY ITEMS OF ALL KINDS
By clicing at this banner you will find all types of hobby products, like helicopter and aircraft models, boat models, electronics, robotics, chemistry sets, and more .
ABOUT SOME ELECTRONIC COMPONENTS
Electronic measurement sensors
Many modern mesyrement devices are by now wholly electronic and they accordingly use sensors of elctronic types to sense the physical characteristics or processes measured. The sensors make an electri current, vary the conductance to an electric current set up otherwise or makes a voltage. The electric parameters that are output from the sensors will then be measureed by a second device and indicated in a scale or registered digitally for subsequent storing, computation and displaying. Here are some examples of electronic sensors.
Temprature sensors: An old device to measure temperature is a termocouple. This conist simply of two different metal parts fused together. The thermic energy in the metals tend to throw electrons over from one metal oiece to the other, but more in one direction than the other and then a thermocouple connected will get a voltage gap between the two metals that can be measured or that can be used to set up a current that can be measured. The voltage or current will vary according to temperature.
Many materials have differnt conductivity in different temperatures. That is also true about materials. On can make temparature sensitive coils or diodes from such material that can serve as temperature sensors. (To be continues...)
Resistors
A resistor is a
two-terminal electrical or electronic component that resists an electric current
by producing a voltage drop between its terminals in accordance with Ohm's law:
The electrical resistance is equal to the voltage drop across the resistor
divided by the current through the resistor. Resistors are used as part of
electrical networks and electronic circuits.
One can use a multimeter or ohmmeter to test the values of a resistor.
Most axial
resistors use a pattern of colored stripes to indicate resistance. Surface-mount
ones are marked numerically. Cases are usually brown, blue, or green, though
other colors are occasionally found such as dark red or dark gray.
Capasitors
A capacitor is an
electrical device that can store energy in the electric field between a pair of
closely-spaced conductors (called 'plates'). When voltage is applied to the
capacitor, electric charges of equal magnitude, but opposite polarity, build up
on each plate.
Capacitors are used in electrical circuits as energy-storage devices. They can
also be used to differentiate between high-frequency and low-frequency signals
and this makes them useful in electronic filters.
Capacitors are occasionally referred to as condensers. This is now considered an
antiquated term.
The capacitor's
capacitance (C) is a measure of the amount of charge (Q) stored on each plate
for a given potential difference or voltage (V) which appears between the
plates:
In SI units, a capacitor has a capacitance of one farad when one coulomb of
charge is stored due to one volt applied potential difference across the plates.
Since the farad is a very large unit, values of capacitors are usually expressed
in microfarads (µF), nanofarads (nF), or picofarads (pF).
The capacitance is proportional to the surface area of the conducting plate and
inversely proportional to the distance between the plates. It is also
proportional to the permittivity of the dielectric (that is, non-conducting)
substance that separates the plates.
The capacitance of a parallel-plate capacitor is given by:
where ε is the permittivity of the dielectric (see Dielectric constant), A is
the area of the plates and d is the spacing between them.
In the diagram, the rotated molecules create an opposing electric field that
partially cancels the field created by the plates, a process called dielectric
polarization.
Inductors
An inductor is a passive electrical device employed in electrical circuits for its property of inductance. An inductor can take many forms, but most forms contain a coiled conductor, and inductor may be called "coils".
Inductance (measured
in henries) is an effect which results from the magnetic field that forms around
a current carrying conductor. Electrical current through the conductor creates a
magnetic flux proportional to the current. A change in this current creates a
change in magnetic flux that, in turn, generates an electromotive force (emf)
that acts to oppose this change in current. Inductance is a measure of the
generated emf for a unit change in current. For example, an inductor with an
inductance of 1 henry produces an emf of 1 V when the current through the
inductor changes at the rate of 1 ampere per second. The number of turns, the
area of each loop/turn, and what it is wrapped around affect the inductance. For
example, the magnetic flux linking these turns can be increased by coiling the
conductor around a material with a high permeability.
The energy (measured in joules, in SI) stored by an inductor is equal to the
amount of work required to establish the current flowing through the inductor,
and therefore the magnetic field. This is given by:
where L is inductance and I is the current flowing through the inductor.
Electrical current can be modeled by the hydraulic analogy. The inductor can be
modeled by the flywheel effect of a turbine rotated by the flow. As can be
demonstrated intuitively and mathematically, this mimics the behavior of an
electrical inductor; voltage is proportional to the derivative of current with
respect to time. Thus a rapid change in current will cause a big voltage spike.
Likewise, in cases of a sudden interruption of water flow the turbine will
generate a high pressure across the blockage, etc. Magnetic interactions such as
in transformers are not usefully modeled hydraulically.
An inductor is
usually constructed as a coil of conducting material, typically copper wire,
wrapped around a core either of air or of ferromagnetic material. Core materials
with a higher permeability than air confine the magnetic field closely to the
inductor, thereby increasing the inductance. Inductors come in many shapes. Most
are constructed as enamel coated wire wrapped around a ferrite bobbin with wire
exposed on the outside, while some enclose the wire completely in ferrite and
are called "shielded". Some inductors have an adjustable core, which enables
changing of the inductance. Inductors used to block very high frequencies are
sometimes made with a wire passing through a ferrite cylinder or bead.
Small inductors can be etched directly onto a printed circuit board by laying
out the trace in a spiral pattern. Small value inductors can also be built on
integrated circuits using the same processes that are used to make transistors.
In these cases, aluminium interconnect is typically used as the conducting
material. However, practical constraints make it far more common to use a
circuit called a "gyrator" which uses a capacitor and active components to
behave similarly to an inductor.
Electronic component color codes
Electronic components are coded with a color band code. The code indicates figures. The interpretation of the figures, differr between the different component types. For resistors the figure indicate ohm. For capacitators they indicate micropharad.. The scheme is simple: The first two numbers are the first two significant digits of the resistance value, the third is a multiplier, and the fourth is the tolerance of the value. Each color corresponds to a certain number, shown in the chart below. The tolerance for a 4-band resistor will be 2%, 5%, or 10%.
The Standard EIA Color Code Table per EIA-RS-279 is as follows:
| Color | 1st band | 2nd band | 3rd band (multiplier) | 4th band (tolerance) | Temp. Coefficient |
|---|---|---|---|---|---|
| Black | 0 | 0 | ×100 | ||
| Brown | 1 | 1 | ×101 | ±1% (F) | 100 ppm |
| Red | 2 | 2 | ×102 | ±2% (G) | 50 ppm |
| Orange | 3 | 3 | ×103 | 15 ppm | |
| Yellow | 4 | 4 | ×104 | 25 ppm | |
| Green | 5 | 5 | ×105 | ±0.5% (D) | |
| Blue | 6 | 6 | ×106 | ±0.25% (C) | |
| Violet | 7 | 7 | ×107 | ±0.1% (B) | |
| Grey | 8 | 8 | ×108 | ±0.05% (A) | |
| White | 9 | 9 | ×109 | ||
| Gold | ×0.1 | ±5% (J) | |||
| Silver | ×0.01 | ±10% (K) | |||
| None | ±20% (M) |
Note: red to violet are the colors of the rainbow where red is low energy and violet is higher energy.
As an example, let us take a resistor which (read left to right) displays the colors yellow, violet, yellow, brown. We take the first two bands as the value, giving us 4, 7. Then the third band, another yellow, gives us the multiplier 104. Our total value is then 47 x 104 Ω, totalling 470,000 Ω or 470 kΩ. Our brown is then a tolerance of ±1%.
Compunents use specific values, which are determined by their tolerance. These values repeat for every exponent; 6.8, 68, 680, and so forth. This is useful because the digits, and hence the first two or three stripes, will always be similar patterns of colors, which make them easier to recognize.
(Most elemements in this article are taken from wikipedia.org, and as such the article is free to reuse.)