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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
Show how to use a cash register?
Check to see that the cash register has a tape. This will be the receipt that you will give to the customer and provide a record of sale for you. 1 Step2 Make sure the cash register drawer is ready. The cash register drawer is where the money is kept. There is a place for change and bills and usually you will store large bills and credit card receipts under the drawer.
2 Step3 Scan the products when a customer comes up to you. Each item a customer wants to buy has to be scanned by the cash register. This includes the inventory number and the price of the product.
3 Step4 Hit total on the cash register. After all the products are scanned you hit the total button and it will be displayed on the cash register. Inform the customer the amount of money he owes.
4 Step5 Enter the amount of money the customer hands you into the cash register and it will automatically tell you the change you must give to the customer. For example, if the customer owes $15 and gives you $20 the cash register will do the math and tell you to give the customer $5 back.
5 Step6 Accept credit cards as payment. If a customer pays by credit card instead of cash, there is a machine that they will use to make the transaction. The receipt will have this information on it. The copy the customer signs is the copy you will place in the cash register in lieu of money.
6 Step7 Complete the sale by giving the receipt to the customer. You have now learned to use the cash register.
What are the disadvantages of electronic tagging?
Can a person be tagged with tracking device? A person brushed up against me I felt a slight sting to my upper right shoulder. These people can now track me even without my cellphone on me or in my car.
thermistors change value as thermal units increases or decreases . that can be used to shut down items that unnecessarily overheat
What do you when your tamagotchi isn't happy or it doesn't want to play games with you?
kill it. nooooooo! never kill it. give it a snack or two and it will become less tense and won't mind playing a game. when it does somthing wrong, give it time out but if it does somthing good, praise it. just pay attention to it and it shouldn't get too bad.
If this is for your Penn-foster test i can tell you one thing is that the the answer isn't "accelerated toward the anode".
Fission and fusion of nuclear power plant?
Fission is the splitting of an atom, fusion is the joining of 2 atoms into one. In most fission, neutrons are bomabarded at the nucleus of uranium or plutonium and this causes a ripple effect of more neutons being released from the fuel. The process generates large amounts of heat which is either used for destruction or steam engines. Fusion most often occurs with 2 Hydrogens being fused together to form helium. Deuterium (Hydrogen with a neutron and proton instead of just a proton) and tritium (one proton and two neutrons) are high energy atoms that are used in testing nuclear fusion. Our star (the sun) is based, like most stars, on Hydrogen being fused to generate heat and Helium.
What is the Frequency response of common emitter amplifier?
The voltage gain is a measure of the amplified output available at the collector terminal divided by the voltage measured on the base. This if you have 10 mV applied to the base and voltage of 1 volt at the collector the voltage gain is 100
ANSWERThe maximum voltage gain of a common emitter amplifier is dependant on the transistor itself. Some have only a very small voltage gain such as in Radio Frequency Power transistors. These are almost all used as common emitter circuits for bipolar transistors or common source for FETs.. On the other hand some darlington transistors can have common emitter gains of hundreds of thousands.If the stage has an unbypassed emitter resistor, the voltage gain is equal to Rload/RE, (Rload is the parallel value of the resistance from collector to the supply and the resistance of the load).
If the emitter resistance is bypassed, the value of resistance to be used for RE is the internal Re which is equal to 25mV/Ie
The gravitational force acting on a mass is the predominant factor determining projectile motion. The actual mass of the object is often irrelevant. To demonstrate this, an object of 100kg mass and an object of 1kg mass are simultaneously dropped from the same height, in vacuum. Observe, they simultaneously hit the floor. In an atmosphere, under conditions of similar geometry, objects of differing density will still fall at the same rate. A 3cm diameter sphere of lead, versus a 3cm diameter sphere of cork, they both have the same shape and size, hence the same aerodynamic properties. Observe, they simultaneously hit the floor. The masses were different, but they still hit the floor simultaneously.
When considerations of air resistance are taken into account, the density can certainly be a factor. (Remember, density is a ratio of mass and volume, or a description of how you use matter to create a structure of a given volume). To demonstrate this, a feather of 0.005kg mass and a solid lead ball of 0.005kg mass are simultaneously dropped from the same height. Observe, the lead ball heads straight to the floor, while the feather flutters about, landing quite a bit later. The air resistance acting against the feather is much greater, it's aerodynamic properties being much different than that of the sphere.
Perhaps not so much the density, but the aerodynamic properties, that affect projectile motion through a non-vacuum. Shoot a solid lead bullet through the air and see how far it goes. Then shoot a feather through the air - the aerodynamic drag forces acting on the feather act to slow it down - and see how far it goes.
What Things do Conductors Have in Common?
If you are talking about electricity then all conductors have either de-localised electrons in their structure which means when a current is passed through they will move and carry the current with them.
Ions can also carry charges but they have to be in solution or in liquid form.
What?
In May 28, 1946, a survey conducted by Bell Labs offered “a discussion of some proposed names”
Among them was "transconductance/transfer varistor".
So the question repeats the common mistake that it was "transfer resistor".
Where do you get the music to put on to your sandisk mp3 player?
read the instruction manual or just go to media player, press the sync, plug in your mp3 player, and drag songs to the side of the "sync list" then press sync...
ATX (Advanced Technology Extended) is a combination of standards for computer system power supplies and chassis dimensions. It was developed as a replacement for the once-common AT form factor.
What is the best LCD monitor for photo editing?
You need a decent computer with at least 2gb of RAM (check your program requirements, they may have changed); 2gb may not be enough depending on image size/resolution, and amount of layers you are working with. On anything less than 1GB it will run slowly and crash from time to time. Photo editing programs are very memory intensive, the best system is one with lots of memory. The more layers you are working with and the larger the image is, the more memory your image editing program will consume. A good video card will also help out, however, it is the memory that is mainly important. A good quality monitor is also a plus.
Good examples are computers are Mac Pro , and Dell Alienware M15X (there may be better examples at this time), but you can also have your computer custom built to meet your needs
on pearl you can find them in the waters of iron island near fuego iron factory and also near the beach south of sandgem you need to fish i belive with the best? rod idk but you can also evolve finneon at lvl 31
What was the first violent video game ever?
Based on my research it was either a Michael Jackson game or Donkey Kong. Either these guys are idiots or kidding. The very first PlayStation game however was Ape Escape. Which was weird since it could only be played on a DualShock controller and at the time they were not released.
Lol Goku is not a human but he looks like one.He is a saiyan and if you watch the anime you would know
What is a rechargeable battery?
Yes.
Most ordinary "nonchargeable" batteries can very well be recharged a few times.
Most alkaline and lithium batteries can be recharged from 3 to 10 times.
Some lithium batteries even more.
I have actually not experimented with other "nonchargeable" batteries.
Problems:
The problem with recharging these types of batteries is that they are not designed to be recharged!
It should be done slowly over long time rather than very fast like most chargers today does.
You can not complain either if the batteries actually start leaking.
They might even "violently" crack open (Explode) if you try to charge them with a lot of current. This so called "explosion" is however not an actual explosion. Using the word "Explosion" causes un-needed fear. What actually may happen is that the pressure inside the battery increases during the charging process. the sealing of the battery may rupture and some of its content, acid or alkaline, may be forcefully sprayed out. This of which is harmfull to skin, espechially eyes. Slow recharging ensures low pressure and less chance of seal breaking.
My method and experiences.:
I recharge my Alkaline and Lithium AA Batteries over a time of approx 16 hours. My battery charger is adjustable and can deliver 25-200 mA. When recharging slowly with only 50mA, the batteries keep quite well and can be recharged a few times.
If recharging at 200 mA, they get warm (due to gas buildup and high pressure inside). This pressure causes batteries to crack open and leak. This mean that battery is forever dead.
As of not exactly knowing the capacity of a nonchargeable battery, it is a bit difficult to give a time frame for recharging. We can however somewhat count on a capacity comparable to similar rechargeable NiMh batteries. These batteries today are close to 2000 MAh. Easy math tells us that recharging such a battery at only 50 mAH takes time. Straight forward, 40 hours, but taken into consideration the loss factor of charging (approx 40%), it would take close to 60 hours to fully recharge.
If recharging at 100MAh this time would be halved to 30 Hours.
My experience though is that when I try to recharge a battery for that long, it will start to leak, almost no matter what. I never charge my alkaline batteries for more than approx 15-20 hours at 50-75 MAh. This will of course not give a full charge but the batteries can withstand it better than a full charge.
They last for ages afterwards in my mouse or keyboard.
Note:
My battery charger is full of corrosion due to battery-fluid from alkaline batteries.
This mainly because I forget the batteries in there for too long a time, or try to recharge too many times.
Why do rechargable batteries stop working properly?
A battery produces electricity because electrons flow from one reactant in the battery's chemical reaction to another reactant. However, once one of the reactants is completely used up, the chemical reaction stops, thus also stopping the flow of electricity. Now, how does a battery recharge? Well, the details of this are a bit too complicated to get into, but I can provide a abbreviated explanation.
A battery charger produces an electrical force that actually causes the battery's chemical reaction to reverse. Thus, when a battery is dead, it has all the products and no reactants. A battery charger will force those products to react with each other and reform the reactants. Once that happens, the battery is ready to go again. This doesn't work for all batteries, however. That's why many batteries are not rechargeable.
Hope this helps!
What is the first electronic item invented?
Probably it's the guy that invented the Leyden jar, wouldn't you think? In other words, it stored a charge and could give off that charge on demand. In a sense, that's a machine which we now commonly call a `capacitor', although it's made of different materials, it still functions the same.
How do you get a cheat Deoxys in Pokemon diamond?
you have to have action replay and then go to game cheats.com and it will tell you
How much is a Sega Genesis worth?
I happen to have a sega genesis in great condition. It plays well and nothing is wrong with it. I would have to say it has to be worth a lot more than $100. I say that accordidng to the condition of your sega genesis, that is how much it is worht.
Advantages of transistors over triode?
Transistors are sometimes referred to as semiconductor triodes.
OK, but to answer the question:
Vacuum-tube triodes need some hundreds of milliwatts to watts just to light the filament/heater. This is wasted power that can appear as waste heat in the circuit, and reduces the electrical efficiency of the vacuum-tube triode. Triodes also have limited lifetimes, commonly due to the filament/heater burning out, or losing its electron emission. Transistors have no such limitations and are (i) much more efficient, (ii) can run at much lower power, and (iii) have very long lifetimes.
Vaccuum-tube triodes cannot be made much smaller than around 10 mm/half an inch in diameter, and maybe the same length. Transistors can be made at the nanometre scale, so transistor electronics are much more compact. Imagine putting together a USB memory chip with (at least) 32,000,000,000 triodes!
Conventional triodes are able to operate to about 5 GHz (5000 MHz). Some special valves can work at higher frequencies, about around 100 GHz is the limit. Such valves are large, expensive, and have high noise figures. Low-noise, small, cheap transistors exist that can easily work past 100 HGz.
How do you change typewriter ribbon of a Smith Corona?
Step 1:
Lift the top off the typewriter.
Step 2:
Remove the old ribbon. On a manual, lift the spools out directly. For a cartridge, press the release lever.
Step 3:
Set aside.
Step 4:
Place the new cartridge in the holder and snap down.
Step 5:
For a spool model, place the two spools in the holders.
Step 6:
Thread the ribbon through the wire holding it in front of the roller.
Step 7:
Close the top.
Is technology part of science?
In a strict definition, technology is a different discipline than science although the two are so closely linked that they cannot be treated separately.
Science is the study of things and events is a systematic way to gain knowledge that can be developed into organized information. Science can be for its own sake, in other words, it does not have to have a practical application.
Technology is the use of knowledge, techniques, information in support of practical activities and solutions. Examples of the earliest technologies include the use of stones as hammers and cutting tools. Later technologies include a vast range of disciplines such as electronics, medicine, weapons and many more.
Without science, technology would be extremely limited in its scope. Without technology, science would have no practical use. There is no specific division between science and technology - the two have a great deal of work in common and there are activities and studies that can be classed as either or both.
What are Biometric devices used for?
A fingerprinting scan is a very common biometric device. There are also iris matching scanners for high tech security. @Nottingham YE$
