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Electronics
Electronics are a branch of technology and science that deals with the control of the flow of electrons.
3,725 Questions
Do nonmetals tend to be just as good conductors as metal?
No, nonmetals tend to be insulators. Some (e.g. carbon) are poor conductors.
Semiconductors (e.g. silicon and germanium) in their pure form are insulators but when doped with the right impurities can conduct as good as metals. This is why they are called semiconductors.
What is sampling in electronic devices?
This means that the device is converting something analoge into something digital. For example converting analoge voltage created by a microphone into a digital signal that the computer can process.
What subjects do you need to study for robotic engineering?
From what I've learned, you should study subjects like science for enhancing technological skills, math for solving mechanical problems, and arts for unique and beautiful creativities .
What components are needed to make a light sensor?
well when you talk in electronic subjet we said circuits you need ,but you normally buy a seurity ir detector and put (don´t know this in english contator is mall piece with metal like electric engines and 2 votages gates one is generated for ir detector and the other one is for you main circuit as alarm when the ir detector turn on that part of the contator the both circiuts turns on) both are normally close
another is a laser alwais on mirror and circuit who detect when light is off that circuit I know needs diode sensor and chip with gates and true table
What is synchronization of alternators?
The frequency of a large electric power distribution system is established by the speed of rotation of many powerful alternators all connected by various tie-lines in the total network. The collective inertia and power of these generators is so great that there is no single load or disturbance which would be large enough to change their speed of rotation. The frequency of an electric system is, therefore, remarkably stable. An alternator can only deliver power to an existing electric power system if it operates at the same frequency as the system. A system whose frequency is 50 Hz cannot receive power from an alternator operating at 50.01 Hz. They must both operate at exactly the same frequency. This is not as difficult to achieve as may appear at first, because (when an alternator is connected into an existing system) automatic forces come into play to keep its frequency constant. Synchronization of an alternator with a large utility system, or "infinite bus' as it is called is comparable to matching a small gear to another of enormous size and power. If the teeth of both gears are properly synchronized upon contact, then the matching will be smooth. But should the teeth edges meet shock would result with possible damage to the smaller gear. Smooth synchronization of an alternator means first that its frequency must be equal to that of the supply. In addition, the phase sequence (or rotation) must be the same. Returning to our example of the gears, we would not think of trying to mesh two gears going in opposite directions, even if their speeds were identical. The next thing to watch for when we push gears together is to see that the teeth of one meet the slots of the other. In electrical terms the voltage of the alternator must be in phase with the voltage of the supply. Finally, when matching gears we always choose a tooth depth which is compatible with the master gear. Electrically, the voltage amplitude of the alternator should be equal to the supply voltage amplitude. With these conditions met, the alternator is perfectly synchronized with the network and the switch between the two can be turned on. Ref aus lab script
What stores have payment plans for electronics?
Believe it or not, QVC or HSN (the televised home-shopping companies) offer many different electronics on payment plans. The good thing about these places is that 1. you can order online; 2. your item is shipped to you immediately and you have it before you've finished paying for it (unlike a layaway situation); 3. there's no interest (like through financing); and 4. they don't do credit checks, so your score won't get dinged for an inquiry. There is fine print that says that "easy pay" options are subject to approval, but I've never been denied and my credit score is terrible.
Hope this helps. I've never had anything but great experiences buying electronics through either of these places. There are also warranties, and you can purchase additional full-coverage warranties that are good for several years after your purchase.
www.QVC.com
www.HSN.com
Do non-electronic toasters draw power when not in use?
yes they do, in fact the toaster draws power more when it is not in use
This is a vague question, so I'll give a vague answer: an image generated from an electronic source (ie. a computer?)
How do you connect your windows PC to your television using rca jacks?
Please keep in mind: if your TV supports COMPONENT VIDEO (YPbPr) instead of RGB, it also most likely supports HDMI or VGA! In that case simply buy the proper cable (and connector if required: DVI-HDMI, VGA-DVI etc.) and connect this way. It will yield best results with the least hassle. These connections will also support higher resolutions (the TV will work like a monitor, not like a TV).
If your TV is one of the older models (not HDTV), maybe even with a curvy back end (CRT, "lamp" TV), then read on!
Most notably, you need* a graphics card with TV-output capability, and a connector.
Once you have it, it's a simple matter. You have two options:
- Composite video using just one RCA/RCA cable, usually yellow (least quality) -- the oldest TVs will probably only support this option (it is also possible to buy a converter for SCART ("EURO") connectors to support Composite Video through RCA, if your TV has a SCART connector only)
- RGB video using three RCA cables - red, green and blue (best quality for analog systems in these configurations) -- most TVs should support this method (except for possibly the oldest TV sets in common use?)
The adapter used to make this work on the PC end should be included with your graphics card, if it supports this functionality. It is designed in such a way that the Green output can also serve as the Composite output (most commonly). (if Green doesn't work, try Blue and Red - some manufacturers do things differently, and there's generally no penalty for trying it out)
The video drivers' assistant (the program used to make changes to your graphics card configuration) is then used to set the TV up appropriately. The driver will take all required steps and procedures to ensure signal compatibility and full-screen coverage.
You must ensure to select the proper display mode (NTSC for US/Japan, PAL for most of Europe and Brazil etc.) and regional standard (PAL-M, PAL-B, PAL-D/K etc.) in order to get a valid picture with full colors. There is no penalty for trying these modes out (for a short time, anyway), so keep switching until it works for you, and stick with that. Maybe make a note for future reference, etc.
Buying cables designed for video signals (about 60 ohm to 150 ohm impedance) will yield better overall quality (less noise), all other things being equal. You can't miss them, they're thickier and more resistant to bending than the rest. DON'T BEND THEM more than they allow - you risk breaking them!
* it IS possible to do this using just the VGA or DVI port, but it requires extensive work to get working properly: a converter for the VGA signals (RGB+Vsync+Hsync into RB+CSyncOnGreen), and software to make the graphics card imitate TV input signals in general (like PowerStrip for Windows, or ModeLine definitions for Linux). Not all graphics cards and operating systems can be forced into required output modes (usually less than 640x480 at 25 or 30Hz interlaced), and not all TVs can take such attempts at mimicry (some very old models even fail explosively). Your mileage may vary.
What is the difference between a Superheterodyne and a Neutrodyne radio receiver?
The superheterodyne converts the desired incoming signal frequency to an (usually lower) intermediate frequency before demodulating it and extracting the audio signal (or video/data, etc).
The neutrodyne is a tuned radio frequency design where all amplifying stages operate at the incoming signal frequency. This was the commonest design up to the 1930s. The triode amplifiers used suffered from signal feedback, where a signal from the amplifier's output was coupled back to its input. This could cause the amplifier to act like a transmitter and to oscillate. Neutralization (with capacitors) was invented to prevent this problem and the circuit was named the "neutrodyne".
There are many type's of capacitors they widely range in price like i use a 35p capacitor in school electronics and they can go to over £5-$6.75 so 1st of all find out the name of your capacitor and simply google it
Where do you get batteries from?
....er... online shop ! such as udtek.com, battery4us.com, ebay.com, buy.com and so on
Why do fruits act as batteries?
its an electrolyte , the electric is actually coming from the metals u put it in it though, potatos just contain the Na+ and Cl- ions
Variable resistor is a passive component where we can vary its resistance simply by rotating it's head .These resistors are available from few ohm to several mega ohm. and are used for regulator or gain control in amplifier circuits. It is three terminal device.
Is the ipod touch 4g a pocket size computer?
yea, and a laptop is not a computer, it is a laptop. ipod touch 4g can do about anything a computer can with a little less RAM.
What? a laptop is *not* a computer? You'll need to state just *what* you mean by "computer".
technically no it runs its own os not osx or windows but yes as in it has a cpu ram and memory, most phones laptops macs severs and desktops are similar but different in terms of OS and sheer processing power, everything is restricted to OS and power eg. laptop small portable, web browsing music and hd vid, games to some extent useually 1 or 2 users
desktop is basicalyy the same but will easily hadle games and 1080p and basic vid editing but still restricted to approx 6 users deepening on hardware and os
phone 1 user limited functionality 720p web browsing and email
sever depending on level (mainframe for example) 1000's of clients (1 client is a desktop or laptop pc or mac) conected, NO DIRECT USER INPUT (with exception on maintenance, setup and diagnostics) backup power and network feeds (fiber to server) can do Hollywood quality 3D movie editing LIVE and still have processing power spare
in short in can do what the os supports and what the hardware is capable sorry it wont make you a sandwich = )
Difference between minor lobes and side lobes?
The minor lobe is divided into two parts; side lobe and back lobe. Both side lobe and back lobe could be called minor lobe.
Can you transmit data ex GPS information or video over a two way radio if so how?
Data . . . Yes. You can use a 2-way (land mobile) radio to convey information in
digital form. In fact, most modern 2-way (LMR) systems carry the voices in the
form of digital data.
Video . . . In principle, video can be carried over a 2-way radio, but you wouldn't
like what you see. 2-way radio is a narrow-band communication channel, so any
information has to be sent over it rather slowly. For video, that means slow-scan
and low-resolution pictures. Ham radio operators do it, but you'd get tired of it.
GPS . . . Sure. The GPS data comes down from the satellites rather slowly, and
after it's detected and massaged by a GPS receiver, it can easily be carried to
another place over a land-mobile-radio link. But all that would tell you is the
location of the GPS receiver, i.e. the 2-way radio that sends it, which you would
probably already know. It wouldn't tell you anything about the location of the
2-way receiver where you're hearing it.
What do electronic manufacturing services provide?
There are many services that an electronic manufacturing company would provide. Electronic manufacturing services would include return or repair services for electronic components.
How do you get the pretty woman secret achievements in jetpack joyride?
Buy a matching set of clothes.
What do you call a negative electrode?
Cathode- is the negative electrode.
Anode- is the positive electrode.
What are the effects of reverse polarization in electronics?
When a magnet's polarity is reversed, the changing magnetic lines of force cutting across wiring induces a voltage in them. This principle is used primarily in motors.
Or perhaps this refers to applying DC power to a device in reverse polarity by mistake. If the device is well designed, it will have a safety diode in the power input area to prevent damage, but if the diode is not present, reversing the power polarity will probably destroy every semiconductor junction in it.
