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Consumer Electronics

Ask questions here about the electronics you use every day: from phones and computers to kitchen appliances and radios.

4,952 Questions

What is Digital HD?

HD stands for 'High Definition' which is the modern and latest file format of camcorders and blu-ray discs that exhibits outstanding audio and video quality.

It refers to any video system of higher resolution than standard-definition (SD) video, and most commonly involves display resolutions of 1,280×720 pixels (720p) or 1,920×1,080 pixels (1080i/1080p).

What parts do you need to make a robot?

There are several things that a necessary for a robot to be called a robot. An anthropomorphic mechanical entity must comprise at least the following:

Sensory Arrays - The robot needs to be able to perceive its environment. You can go into great debate as to which senses may be negated given the foundatin of the robot which would more than likely be electromechanical sources.

Locomotive Mechanisms - The robot needs to be Abe to move. Whether the robot is amphibious, designed solely for land, sea or air use, it is necessary for the robot to be able to navigate its environment.

Processing unit - The brain, as in most sentient beings must be able to process information received from the senses.

Rockets - you're going to want to get some rockets. The world won't take over itself.

Which is better a 5mw green laser pointer or a 5mw blue laser pointer?

Well I wouldn't say either one is better; it depends on what you want:

If you want a visible beam / bright laser get the green one.

green can do everything a blue can and more if its limited to 5mw but blue is just cool because its blue. its not better its just expensive

I perfer green they can be quite cheap for the type of laser on Ebay.

Blue always hangs cheapest around 50$ less if your lucky

Blue is always expensive I dunno why but its not better if your comparing 5mw to 5mw, not in my opinion at least

the green laser is better you can go all the way to 1000mw's witch is powerful don't go to eBay. you can find what you want on this site here ya go. happy hunting

laserpointerpro.com have fun you will be on that page for awhile.

How do you turn off alarm beep on watch?

To DISABLE beep, you must unscrew and removed back plate of watch and place a piece of paper between back plate from coming in contact with battery. This will also disable alarm chime but will solve the annoying beeping sound. Hope this helps!

What was Technology in the 1920's?

The Radio, A/C, Lightbulb, Neon Light, Airplane, Photography, Telegraph, Movie Picture, Automobile, Submarine, Tank, and Train already existed. The First Robot, & Lie Detector, both built in 1921. First 3D movie in 1922, Self Winding Watch, Traffic Signal, & Cathode Ray Tube invented in 1923. Loudspeaker 1924, Mechanical Television 1925. Liquid Fueled Rocket 1926. Technicolor, and Electronic TV invented in 1927. Car Radio invented in 1929.

What is the open hours for Sam's Club on Christmas Day?

Bulk retailer Sam's Club is closed on Christmas Day like most other U.S. retail stores. The store does remain open on Christmas Eve though. The hours are generally cut short on Christmas Eve and stores close in the evening around 5 or 6 p.m.

What replaced the cassette player?

The compact disc player, or CD player. I remember back when cassette tapes were still relevant, and the CDs took over!

What is the formula to find joules?

To find joules, you have to multiply the force or newtons by distance in meters.

What is the difference between rectifier and converter?

A rectifier converts AC voltage into DC voltage. A converter is something more general. It describes not only rectifiers, but also devices that can turn DC into AC or perform DC-to-DC or AC-to-AC conversion.

Who invented the joystick?

The first use of joysticks was in aircraft, used to control ailerons and elevators.

Early pilots, like Robert Esnault-Pelterie, Robert Loraine, James Henry Joyce and A.E. George, all claim to have invented the joystick, or be involved with inventing the joystick. The first recorded use of the term was in Robert Loraine's diary in 1909.

Will a wireless N-LAN adapter work with a 802.11g router?

Yes, a wireless n adapter is backwards compatible with wireless g. Check the box you are buying and it will tell you if it is compatible with which wireless ranges.

What is the value of a working IBM Electromatic typewriter today?

Hi,

In all probability, not very much. With the invention of work processors and computers, and with all the available fonts, etc., the electronic typewriter has become more of a paperweight than anything else.

I have a working IBM Selectric, and I dig it out once in awhile just to keep it working right. Unfortunately, I can't give it away.

If you really want an idea of their value, try searching Ebay to see if any are listed there. The only value would most likely be sentimental, at this point.

Hope this helps,

Cubby

How do you define constant angular velocity?

Assuming you mean "Constant angular velocity", let's break it down.

Constant, meaning "something that does not or cannot change or vary".

Velocity is distance over time, or "speed". Angular velocity is the angular distance (such as "one rotation")

An example of velocity would be 60 Miles per Hour (MPH). That would be that in one hour, an object would travel 60 miles.

An example of angular velocity would be 45 Degrees per Hour.

For a real world example, Earth turns 1 full revolution every day. "1 revolution per day" is an angular velocity. Lets convert this to a different unit. There are 360 degrees in 1 revolution. Therefor, we can say that Earth has an angular velocity of 360 degrees per day." We can convert this unit again. There are 24 hours in one day. 360 divided by 24 = 15 degrees per hour, which is another example of angular velocity.

Simply put, angular velocity is the speed at which something is rotating.

In computers, angular velocity is commonly used to describe a mechanical hard disk drive. Hard drive speeds are measured in Rotations per Minute (RPM) and are commonly 4200, 5200 or 7200 RPM. The faster the speed of the hard drive, the faster it can read and write data.

What is out of phase for a speaker?

In general, speakers have two connections, and it is important to connect them the "same way" to the amplifier. (Amps also have pairs of output terminals.) We usually designate the terminals of the speaker as positive and negative. (Outputs of amps are usually designated the same way.) It is important to connecteach positive speaker terminal to the positive output of the amp for a given channel, and each negative speaker terminal to the negative output of the amp for a given channel. This way the speakers will be connected in phase. It is possible to reverse all of the connections and not have problems, but it is critical that speakers be connected in phase.

Speakers do not become out of phase or change phase. When they are constructed, their operation is fixed and will not vary during their lifetime. A given polarity of a wave, either positive- or negative-going, will always cause the speaker to move in the same given direction.

How much does an average computer tower weigh?

The main components are:

Motherboard - the 'brains' of the computer - holding the CPU, memory and various sockets and chips.

RAM - the temporary 'memory' - which is wiped when the power is turned off

Hard-drive - a mass-storage device containing all the computer programs the user wants to use. It's contents are not wiped when power is turned off.

Optical drive - an input/output device that can be used to read data from the computer to be used on another machine - or be used to load programs onto the computer.

Video card - to provide an image for the operator to see what the computer is doing.

Power supply - which steps down the mains to a more usable voltage for the computer to use.

There are other minor components - but those are the main ones.

What are some ways to use electricity safely?

you can unplug devices that you use rarely after you use it

By Rebecca Rice