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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
All types of fuse work in exactly the same way. A fuse is an overcurrent protection device which protects a circuit against overload currents or short-circuit currents.
Overloads are caused when too high a load is connected, causing the supply conductor to carry more current than it is designed to carry. If this is allowed to continue, it may cause the conductor to overheat and represent a fire hazard.
Short-circuits occur when the line conductor accidentally comes into direct contact with either the neutral conductor or the earth (ground), causing a very high overcurrent to flow.
A fuse contains a metal strip, called an fuse element, which is designed to melt and disconnect the circuit in the event of an overcurrent. The higher the overcurrent, the faster the fuse will act to disconnect the circuit.
Fuses are graded in such a way that the fuse closest to the fault should operate first. For example, the fuse protecting a residential lighting circuit should operate faster than the fuse protecting the consumer unit.
around 10.05pf
How do you hook up two VCRs to a projector?
Only if your projector has two inputs,hook up the output video/audio of VCR into the input video/audio of the projector.
Radio Shack sells switchers to do this very function.
Coarse mixture has substances that are mixed and yet can still be seen. In other words, the mixed substances did not dissolve.
What is the lifetime of printed circuit board?
Depends on the material it's constructed from, the application for which it's being used and the atmospherics to which it's exposed. I have printed circuit boards from the very first model of an RCA transistor radio made in 1957 and the circuit board as well as the electronics still work.
Difference between alkalized and galvanized batteries?
The old galvanic power cells that we used in our flashlights, and so forth, actually had a thin wrap of zinc alloy as one of the two electrodes. The other electrode was composed of thin sheet material with an acid paste applied to it and wrapped round and round with the zinc.
(Plating something with zinc to make it rust-proof is called "galvanizing", which has nothing to do with your question, other than to explain where the term comes from)
Alkaline power cells use an alkaline or basic 'paste' rather than an acid one, in a structure that is much more delicate than the glavanix cells, but with much more surface area, to create a much longer-lasting cell.
(PS, they are not batteries until 2 or more power cells are connected. It's like a battery of psychological tests, a battery of heavy naval guns, or the old baseball term, 'battery', which meant the pitcher and catcher working together as a team.
What is the lifespan of a modern refrigerator?
18 cubic foot refrigerator (bottom-freezer) purchased in June 1998; failed in December 2007 (lasted 9.5 years); energy use is 699 kWh per year. New 18 cubic foot refrigerator (bottom-freezer) energy use is 476 kWh per year. Buy a new one to save energy.
AMOLED is an 'active-matrix organic light-emitting diode'. It adds a layer of semiconducting film behind the OLED panel which allows it to more quickly activate each pixel. That increased speed makes it ideal for larger, higher definition displays with a lot of pixels. In fact, it's as much as 1000 times faster than LCD.
AMOLED screens also tend to have great contrast, as the light on the screen comes from each individual pixel rather than a backlight; when it needs to create a black color it simply dims or turns off the relevant pixels, for a true, deep black.
AMOLED screens also use a large color gamut, so they can display a wide range of colors, but that can also cause images to look very vibrant or over-saturated.
Why are there no grandson clocks?
There very well may be. The name "grandfather clock" comes from people saying, "that clock belonged to my grandfather." Thus, if you have a grandson, and he has a clock, it may be referred to as a "grandson clock."
What does technology have to do with science?
The difference is that science tries to explain what is measurable. Technology is the processes, inventions, or techniques that are applied to solve certain problems.
They sound like totally different things. In centuries past they were two different things.
Since our modern world decided to marry science, the "why" of the physical world, with technology, the "how" of the physical world, we found that we improved on both. Knowing "why" gives insight to the "how" and better technology is the result. Knowing "how" can give insight to the "why" and that is how science is improved. The discovery of this synergistic effect was evident all through the 20th century and made our world radically different from that of 200 years ago.
A good example is the development of radar. Scientists learned about the properties of radio waves, which leads to the invention of practical radar, which itself gave insight into weather, which forced the invention of Doppler radar, which improved the understanding of tornadoes, which gave rise to the ability to give better tornado warnings, which forces the invention of better ways to get these warning to people (better siren systems, reverse 911, more localized weather radios), and so on....
Most of the technology we have in the 21st Century came from marrying science with technology.
It's based and operates based on scientific discoveries and principles.
Why are notebooks usually more expensive than PC's with comparable power and features?
Notebook and their replacement parts cost more than desktop PCs with similar features because their components are designed to be more compact and stand up to travel. They use…compact hard drives and small memory modules and CPUs that require less power than regular components. Other factures to consider: the original equipment manufacturer's warranty and a customized installation of the OS that is unique to notebooks.
Why look up all the answers - here they are!
Chapter 11
Reviewing the Basics.
1. Because their portability. They use thin LCD panels instead of CRT monitors. It costs more to make smaller parts that take up less space.
2. 200-pin DDR2 SDRAM, 200-pin DDR SDRAM, 144-pin SDRAM, 72-pin FPM or EDO
3. Ni-Cad, NiMH, Lithium Ion
4. AC Adapter, DC Adapter and battery pack
5. Video Inverter Card
6. Type 1 are up to 3.3mm thick, Type III are 10.5 mm
7. Hot-swappable
8. The Socket service and the Card service
9. A "Dongle" or "Pigtail"
10. add/remove hardware for Windows 2000 , PC Card applet for windows 98
11. Restart computer and then press F8 function key. and then select last good configuration mode. Update Windows with latest XP service pack.
12. SO-RIMMs
13. memory, hard drives, lcd panels, mini pci card, motherboard, CPU, keyboard, PC card, floppy drive, and sound card
14. so you don't void the warranty
15. The DC controller is a card inside the notebook that converts voltage to CPU core voltage.
16. You lose all the Data and Applications on the PDA
17. Windows Mobile and Blackberry
18. A port replicator provides a means to connect a notebook to a power outlet and provides additional ports. A docking station provides the same function as a port replicator, but also adds secondary storage.
19. Hard drive
20. Type I, Type II (which have 100 pins) and Type III (which has 124 pins).
21. allows the use of two modem connections at the same time to speed up data throughput when connected over phone lines
22. The Standard XP setup CD might not have the supports drivers specific for the notebook.
23. model and serial number
24. go into CMOS setup and disable the internal device.
25. Bluetooth, usb/serial port, wifi/internet connection , universal cradle
Thinking Critically
1. B
2. How much money do you want to spend? Do you type faster than you write? What kind of notes are there (pictures, text)?
Can an emulator for DS simulate the Nintendo Wifi system?
No. Unfortunately, there aren't any NDS emulators that can simulate the DS Wifi system and successfully log in to the GTS.
Manufacturing, medicine, military operations, police operations, research, education, deliveries inside corporate buildings, bomb diffusion, space travel and research, deep ocean activities, inside nuclear operations, Haz Mat operations...
Usually, robots are used for dangerous, dirty or dull jobs. But they can be used for fun, education (see Lego Mindstorms), and extremely precise tasks, as well.
Manufacturing, medicine, military operations, police operations, research, education, deliveries inside corporate buildings, bomb diffusion, space travel and research, deep ocean activities, inside nuclear operations, Haz Mat operations...
Read more: http://wiki.answers.com/Where_are_robots_used#ixzz1EQC6ZSXa
Pollution from toxins that are being thrown into there natural habitat causing mass mutation
Sorry, this question is unanswerable in the form you ask it. In order to answer it would be necessary to know what is meant by "a 1cm by 1cm square center leg at 14 volts". I have been an electronics engineer for 30 years and I don't know what you mean. Do you mean the ferrite core is 1 centimeter by 1 centimeter, with a center-tapped leg, the direct current voltage being 14 volts at that leg, 28 volts direct current total, irrespective of the waveform changing at 100 kilohertz? It would also be necessary to know the gauge of the wire, the type of the ferrite, the waveform, etc. Also, where are you measuring the strength of the magnetic field in Tesla units, one Tesla = 10000 gauss, at the center of the coil or some distance away?
How do you tell what my 2-way radio frequency is?
To find out the frequency you need to buy a frequency counter but they are quite deer so try searching on internet or talk to people that use radios alot and they could tell you
Can you add salt with anti caking agent to a saltwater pool?
I have never heard of using an anti caking agent with salt. Are you using the right type of salt - - swimming pool salt is the only salt to be used in a swimming pool - NO OTHER. The proper salt to be used will readily dissolve as it is poured into the pool. The salt does need to be brushed as it settles to the bottom of the pool. Have you done that? Did you read the instructions on the proper start-up procedures? k
How can you test non-rechargeable D cell batteries for voltage?
Put a test meter on the end of the D-cell battery
What is single core armored cable?
Armored electrical cable contains insulated electrical service wires protected by a flexible steel covering. Unarmored electrical cable has no protective flexible steel covering, its covering is made of plastic.
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Armored cable (BX) is the older version of Metal Clad cable (MC). It was flexible steel covered wire that used the steel as it's Ground. BX was a poor grounding system so it was replaced with MC which looks similar but has a separate Grounding conductor. MC is most often made with aluminum as its cover.
Armored cable if used today will refer to MC type wiring.
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Some kinds of armored cable are in fact made to a tougher standard than the ordinary soft wire strand types of shielded cable that are used for hooking-up antennas. The 'armor' is actually a thin flexible metal film that better protects the wire or wires inside from damage in high use or high traffic areas. Such kinds of armored cable are also used in radio frequency assemblies in electronic equipment.
What stops the flow of electricity?
Turn off the switch, generator runs out of fuel, wind not turning the windmill, solar panel at night, diode, insulation.
How do you fix Motorola's phone if the screen went blank?
Everyone says put it in the freezer for five minutes but mine is broke too so id say go get it repaired or buy a new one.
What are ultra sonic frequencies?
Audio (sound) frequencies above the range of the human ear. This is generally said to be above 20,000 hertz.
The simple answer is "NO". Whatever is tapped-off of the secondary, or otherwise modified, does in no way diminish the laws of transfer of power from one winding to the next, or available potential. Whatever is actually realized at the secondary will never be 100% of the input due to losses in transfer, such as heat losses. * I'm still not sure but having thought about it more I now think that if you increase the resistance in the secondary circuit and therefore decrease the secondary current, without changing either voltage, the power on the secondary would fall with the current. The primary power would also have to fall to remain equal to the secondary power (heat losses aside), and the primary current would also fall. Is this correct? Thanks Yes. Because a transformer is very efficient, power measured on each side is almost the same. P = VI = vi The voltage ratio V/v depends on the number of turns in the windings and is therefore constant. Decreasing resistance on the secondary side allows an increase in the current. Current on the primary also increases because power in is equal to power out.
