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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 the best brand of television to buy?
Best Buy and Circuit City both sell televisions at a low price. There are many other stores that also have compatible prices. It would be wise to shop around and compare prices at numerous stores to get the best deals.
This is one of the smallest and simplest autonomous ones I have found yet, thanks to FriPilot http://members.tripod.com/robomaniac_2001/id120.htm Otherwise, I have had pretty good luck with buying small remote control cars at the dollar store (or the stuff my nephews throw away) and taking them apart to reconfigure the motors into what I want, but that ends up with wires connecting the robot to the controller. Some of the people I work with have pieced together radio control cars and other parts to get radio control robots. If you prefer robot kits, some hobby stores sell a few inexpensive ones that are sometimes configurable. Otherwise some of the less expensive construction kits like Lego or K-NEX or Construx or a few others have motors and gears in the kits. If you have a larger budget, Lego Mindstorms, Bioloid and several others are more advanced kits that are programmable and autonomous. Some very important terms to keep in mind are: operator controlled - the robot has motors in it, maybe some electronics, it doesn't move until you push a button or lever on the controller. remotecontrol - usually connects the robot to the controller by a wire, you can usually keep the batteries in the controller to make the robot lighter. radiocontrol - the controller is a transmitter, the robot has a receiver on it, both need batteries or some other power suppy. autonomous - you set up the robot and hardwire it or program it to run sets of commands, when you set it down and turn it on it runs the commands. Usually requires programming knowledge (like BASIC, C language, Assembly, ForTran, COBOL or some others) and electronics knowledge (like soldering, power supply vs. load, Programmable Logic Arrays, Trans/ceivers, sensors, and many other options). But of course it is the most fun. sensory feedback - the robot can have switches, sensors or detectors on it that send information back to the controller (or its processor if it is autonomous). Might require a transmitter on the robot and a receiver in the controller (with some indicators to tell you what the robot is "sensing"). Anthropomorphism - "the attribution of uniquely human characteristics to non-human" things and critters. There is a ton of things that can go together to make a robot. If you learn how to fix toys, appliances and cars it definitely helps you figure out robots.
When did Albert create electricity?
Actually Benjamin Franklin did not invent electricity. (No-one did.) However, he did invent lightning rods and he did suggest experiments to show that there is a connection between lightning and electricity. For more about him you might like to read his page on wikipedia.
How much energy does an incandescent lightbulb use versus a fluorescent?
Yes that's true fluorescent bulbs are better because it usess 75% less energy and works longer than a incandescent light bulb.
Yes...and no. It is true that power usage decreases with fluorescent balb usage. However, one must take into account that they pollute more (i.e. mercury and other heavy metals).
When was satellite communication invented?
In 1957 when the Russians sent up the first earth orbiting satellite, Sputnik.
It sent out a radio signal which was nothing more than a beeping sound spaced about a second apart, if my memory serves me correctly. People all over the world tracked the beeps, which seemed to have not contained any data at that time. More than likely, it was just a tracking signal.
I remember as a youg boy getting up around 4 am to see it as it flew over. It was just a bright but tiny dot moving across the night sky. Kinda scary at the time, but look what it started.
In the Western World the first printer was the printing press invented in the 1700's. This was a huge innovation since up until then, everything had to be hand copied. The printing press consisted of blocks with letters that could be arranged in a tray and then emptied to make a new page. It was first invented in China and was adopted and modified by Europe in the mid sixteenth century.
As a corporation, the company is owned by its shareholders, or people who invested money in it.
How do you turn off alarm on no name watches?
First off, do not buy no name watches. They are always cheap knock offs and you normally don't get the functionality from them that you should get. With that being said, you should NEVER set the alarm. If by some strange chance the alarm was set when it left the kid sweat shop then that's a sign the kids are acting up.
On my no-name watch...
Hold button #2 (mode) down, wait a few seconds, then depress button #4 (reset) , then depress button #3 (stop-start) to turn chime/alarm off. To turn chime/alarm on again depress #2 (mode) , wait a few seconds, while continuing to hold down #2 , depress #4 button ...turns chime on . More power to the sweatshop kids i say..i luv the watches!
What is the purpose of gas in MIG welding?
Metal inert gas (MIG) welding, is a process upon where a continuous and consumable wire electrode and a shielding gas are fed through a welding gun.
If this is not enough information, there are many great articles about it on the web.
Is a vacuum tube modern technology?
By qualifying the question "Is a vacuum tube a modern technology" to represent the application of vacuum tube technology in modern, even leading edge audio technologies of today we have a much better approach to answering the first part of this question.
The application of vacuum tube technology in high-fidelity, or high end audio amplification technologies can be very modern indeed. Separating the industry into two halves is required to further define what is modern about vacuum tube audio. The vast majority of applications currently being manufactured for the sole purpose of providing a more realistic sonic experience, is by and large not a novel approach. Those who actually "reinvent" or who discover a novel approach and apply new methods, thereby furthering the art and science of listening are in fact on the leading edge of modern application of vacuum tubes. Some company's and namely Singlepower Audio, reinvented the approach to using the vacuum tubes from WWII era 1940's, and invented new amplification methods to drive the listening experience into a new realm, are in fact leading the way to further the art and science of vacuum tube technology applied to amplification.
This question is most likely the result of someone either seeing, reading about, or actually listening to tube audio amplification. The general discussion that ensues is one of provoking the bias towards what is actually better. Are vacuum tubes better than transistors, or vise-versa? The common myth is that transistors are by default better since they are "modern technology" and by default all things modern are somehow better. It is the disbelief that what is heard actually is better (well maybe not for all, but many of us).
All opinion side, by the very definition, or rather qualification of this question, we can easily reach the conclusion that is it both Modern in it's application as it occurs in the audio industry (high-end), and it is one of the most basic forms of amplification device that is over 100 years old (more like 104).
Every microwave cooker contains one vacuum tube called a cavity magnetron that generates the microwaves to cook your food. These tubes are the least expensive power microwave oscillators there are, thus their use for cooking.
What would happen if there were no television?
One would be that we would not be as knowlegeable about he world around us. We see every event in the world where there is a camera or a cell phone.
I personally would think there would be large scale riots, people like TV A LOT.
AnswerWe would spend even more time on the Internet.Most of history, and a large part of the lives of people now alive, took place without television.
How does the water clock work?
The water clocks were originally made from two containers of water, one higher than the other. The water then travelled from the higher container to the lower container through a connecting tube. The containers had markings on them to show the level of the water and these marks told the time.
The design was improved upon over the years and adapted to become easier to use and more accurate. One of the more notable changes was the addition of a floatation device. As the water dripped from the higher container to the lower container, the level of water rose and with it went the float. This float was connected to a stick with notches that, as it moved higher and higher, moved a hand around a clock face.
How did china influence western Europe?
They ate a chinese person and then they knew everything they did
Well, to put computer information onto paper, to have a hard copy of the information in case a computer is not a viable option for the presentation of the information. Also for things such as Posters, flyers or handouts; which can be designed on a computer, but are not that useful on one.
Who invented a computer first?
the first computer was invented by Charles Babbage in 1945 so it would be niter
the first computer was invented by Charles Babbage in 1945 so it would be niter
and so that it would be eaiser to find places and other people around the world.
How much do electronics cost go down on Black Friday?
The cost of things on Black Friday vary, depending on where you want to shop at or what you want to buy. Most of the time many stores offer about 50 - 80 % off of regularly priced items.
Hope this Helps!
How do you get your parents to give you a cell phone?
you don't. you think about whether you really need one, why you want one. then if you think of a very good reason why you shoud have one, you ask your parents if they are okay with it as long as you are responsible with it. you may come to an agreement that it is a good idea to have one if you buy it or legitimately earn it yourself. if your parents say no, accept it and trust their wisdom. besides, I'm willing to bet they grew up without a cell phone and lived through it.
you asked.
What impact did the wristwatch have upon society?
they allowed people to have a watch that they didnt have to worry about losing because it would be on there wrist. it probaly is one of the best watch innovations
How much do people spend at Christmas?
not enough santa is too cheep to pay he just gives the parents the bill and leaves how rude
What is the effect of emitter resistance in common emitter amplifier?
The gain of a common-emitter amplifier is collector resistor divided by emitter resistor, or hFe, whichever is less. Since hFe depends on temperature, designing the amplifier to be dependent on resistance ratio makes it more stable. As such, the emitter resistance serves to stabilize the amplifier.
Defination of pn junction with diagram?
A PN junction is a semiconductor interface formed by joining p-type (positively doped) and n-type (negatively doped) materials. This junction creates an electric field that allows current to flow in one direction while blocking it in the opposite direction, functioning as a diode. The p-side is rich in holes (positive charge carriers), while the n-side contains electrons (negative charge carriers).
Here's a simple diagram representation of a PN junction:
P-type | N-type
+----+ | +----+
| | | | |
| | | | |
+----+ | +----+
In the diagram, the '+' symbols represent holes in the p-type material, and the '-' symbols represent electrons in the n-type material.
What are the applications of ujt?
The simplest application of a UJT is as a relaxation oscillator, which is defined as one in which a capacitor is charged gradually and then discharged rapidly.
