Consumer Electronics

The DVD is the work of many companies and many people. DVD evolved from CD and related technologies. Some of the early proposals for "high-density CD" were made in 1993, and these efforts gradually coalesced into two competing proposed formats. The MMCD format was backed by Sony, Philips, and others. The SD format was backed by Toshiba, Matsushita, Time Warner, and others. A group of computer companies led by IBM insisted that the factions agree on a single standard. The combined DVD format was announced in September of 1995, avoiding a confusing and costly repeat of the VHS vs. Betamax videotape battle or the quadraphonic sound battle of the 1970s.

Transistors have two basic functions: # an electrically controlled electric switch # an electrically controlled "proportional valve" which can alter currents and voltages, or can amplify electric signals.

Transistors can also be configured as Oscillators which provide an AC signal with constant frequency. Either an amplifier circuit or a switching circuit can be wired as an oscillator.

Transistors can be used to form logic gates: And, Or, and Invert. Computers are made from logic gates, so computers can be made entirely from transistors.

Transistors are in use in virtually all electronic devices. PC processors are composed of millions of tiny transistors. A transistor radio may have had only 6-10 transistors to enable operation. A late model car may have 10 to 15 computers comprised of thousands of transistors to perform all manner of operations in the vehicle.

Generally, yes, although it depends on a number of factors.

A general way to answer your question is through demonstration: do cell phones (which run on rechargable batteries) charge while on? I've never seen one that doesn't, and the same applies to laptops. As long as the apperatus can be plugged in while battery is still in use, it probably can.

Rather than type out a long list, I refer you to the NRC website, see below

21 mins on a mini, 2 hours of good quality mpeg4 encoding, 4 gig disc Actually you can have up to around 8 hours on a single sided single layer dvd. It really depends on the compression codec and quality used. Mpeg 4 isn't not widely used in dvds. MPEG2 is commonly used and can be conpressed enough to fit around 6-8 hours but the quality does suffer. Two hours is generally considered the max for "DVD Quality" picture. MPEG4 could probably fit more video but most DVD Players will not play MPEG 4

all electricity is natural, due to the fact that electricity is a force of nature. you may be referring to "voltage" which is the difference of charge we sometimes create in order to get work out of electricity, a "synthetic" example would be the 110V at an outlet i suppose, while a natural example would be lightning, or the shock you get from touching a door knob after dragging your feet on carpet.

Garrett Morgan invented the first electric stop light around 1926

The 2 models are Black and White but you can get the IPad 2 in 16gb 32gb or 64gb in wifi or 3G.

What is a fitness circuit? a fitness circuit is were it makes u fit and healthy. Is a circuit breaker a circuit? No, it is an inherent part of the circuit. In simple terms and condtion

In the US at least, no, linear amps are not legal for use on CB radios. The maximum wattage permitted for AM transmission is four watts, and the maximum wattage permitted for Single Sideband is 12 watts.

You can increase the efficiency and life of your AC by having it inspected by a technician and changing the filters every month.

Get one at Radio Shack for $5.39...

item number 274-366

They didn't many TV's still have picture tubes in them in 2008

Charles dickens

i think the electric ketle was made in 1940

got to time mode hold down reset button and while held press mode. If days of week are blinking, it beeps. if not, it doesnt

Sparking electronics store

Depends on many factors. What frequency are you talking on, what are the atmospheric conditions like, how good is your antenna, are you sending code or trying to talk voice, how good is the other ham's receiver, etc.

I can tell you that when I first received my license in the mail, my first contact on ham radio was with a ham in Arizona. I was in San Luis Obispo, CA. He was running 1/4 watt of power, using Morse Code (or, CW, as we call it, for Continuous Wave).

There are hams that have talked with countries all over the world using less than 5000 watts of power. This question cannot be answered with a simple number - there are way too many variables involved. Here are some false ideas to take into consideration:

The more sensitive the receiver is, the less sensitive the transmitter must be to transmit a signal. The opposite is also true.

The lower the frequency, the farther the signal can travel due to the wavelength. Lower frequencies tend to be less stable than higher frequencies. Higher frequencies cannot transmit as far.

Answer:

Everything above is true but I would like to add that my stupid idea is that the antenna used for communication is the single most important part of a ham radio station. A poor antenna will waste power in itself instead of radiating it. (The polo something..... don't remember) is important. A gain antenna which is directional "like the ones you see on most ham radio towers" both transmits and receives "hears" in only the direction it is pointed greatly enhancing signal strength. If you have a thousand dollars to spend and you could buy a linear amplifier or a good antenna, buy a good antenna. You won't regret it. I have been non technical in my answer but there are tons of pages on antennas on the net as it is one of the most complicated subjects there is.

Let me expand on the top answer. The QRP group would insist that you can communicate all around the world on miliwatts. This is true, but not practical unless QRP (low power) is what you wish to do. The most common max power on a new radio is 100 watts, although some of the more expensive radios could have more. With the stock 100 watt radio, depending on atmospheric conditions, your antenna type, and the height of your antenna, you could talk to most all countries, but not on demand. What I mean by demand is that you can't control when you will make each contact, but each day, or night, you may contact some part of the world. Learning is what Amateur radio is all about. I suggest that you find your local radio club and go to one of their meetings. Once you introduce yourself, and express a desire to learn more, most hams will want to help you get started.

Let me add that

Atmospheric conditions are always changing, and we have some very good years for propagation, and some are pretty bad. We are coming down from one of the best years for radio wave propagation, and it will continue until propagation gets poor. That will take a few years ,and will be a slow process. As already stated, the antenna is 75% of a great station, with the radio being the other 25% It is true that you can use a linear amplifier to put out maximum allowed power, but putting that power into a poor antenna will be a big waste of time and money. The poor antenna will yield very poor reception, and even though the linear amplifiers will amplify reception as well as transmission, it can only amplify what it can hear. Very poor antennas can hear very little compared to the ideal antenna. If this all sounds like Greek to you, it is more the reason to join your local Amateur radio club and become well educated in radio use, antenna design, radio operation rules, and meet a lot of great people with the same interest. If we ever have a world war and it renders our normal communication methods useless, it will be radio Amateurs who will save the day with ingenuity that is MacGyver-ish in nature.

An opinion added by another contributor:

I strongly second the motion and support the statement that the antenna is

the most important part of the ham radio station, and if I could give it 18 more

votes then I would do that too. The reason it may sound like a stupid idea is

because it's such a simple statement of such profound wisdom. Are you trying to

tell me that a bunch of wire or metal rods or pipes has more effect on successful

communication than a big hot linear amp that goes for 5000 bucks has ? ! ?

Absolutely.

- - - - -

Five thousand watts? Legal power on the amateur bands IF you have an Extra-class license is only 1500.

If you're working Morse you can communicate with Japan on 5 watts or less if you have the right antenna and good atmospherics. It's been done with less than 1 watt and a good directional antenna with director and reflector elements. Voice you'll need more power, but 100 watts and a directional antenna will talk to anywhere in the world.

Legally, you can't. Under International laws, tarriffs and treaties, and in the US, under FCC regulations, radio communication equipment is designed and manufactured to operate within specified output power limits. It is even illegal to work on transmitting equipment, including repair, without a proper license.j3h.

as crazy as this may sound, well, here goes. The engine light comes on. Okay.

What alot of people fail to realize is; is that the modern engines are loaded down with vacuum, and oxygen sensors. If you have been allowing your fuel tank to go below the 1/4 of the tank (between empty "E" and a quarter tank) your asking for all kinds of trouble. Moisture forms in the gas tank and is sucked through the fuel line from the fuel pump and the service light sees this as a moisture and so the vehicle's onboard computer is picking this up and disputing this information. Eventually, the sensor (oxygen sensor or dew sensor) may even get so full of moisture that it builds up enough osmosis or water pressure that the engine will actually sputter or miss or may not even run.

So my advice would be to never let it get to the critical point. (Don't wait till it's at a quarter to add fuel.

For now, add stp gas treatment. Put 2 bottles to chase the moisture out, then fill it up with the high super octane.

Put above 90 octane about every 4th fillup. It's good for the engine.

PS: always make sure your gas cap is on good. That's another sure way for moisture to sneak in.

Give it a shot....

ted.tate40@gmail.com

Industrial Electromagnets Use higher quality metals for the coil winding. Also the windings are of different design and there are more of them. The metals used for the conductor are also of better quality material and have greater voltage sent to them.

Any earphones should work.

hope you find this useful. :)

1912

Few swearing words. For example, GLaDOS says "What the hell is going on here?"

Black is considered as the `absence of light', or the complete absorption of the visible spectrum, from which no light reflects.

In video projectors, the light is completely blocked from reaching the screen, creating the same effect. It appears to be black because you're usually watching it in a darkened room and in relation to the brighter areas on the screen, your mind perceives it as being black. In reality, if you were to look at the screen, you'd still see that there's no light hitting it to reflect back to your ryrs from the screen.