advantages of relays?
931250
Relays are the foundation to modern computing... The orginal computers were based on relay systems.
567127
The main advantage is a somewhat "fixed" location in the sky relative to the Earth, and relative ease in repositioning them into other fixed positions. There are also some advantages to lower orbits. \n\nGPS satellites are NOT geostationary.  They rely on precise on board time signals and precise knowledge of their orbital ephemerii and a large enough "constellation" such that 3 or more are above the horizon and able for your receiver to pick up at any point in time over nearly the whole planet. \n\nWith a sophisticated control system you can make do with several low orbiting satellites.  The advantage with a low orbit is they are cheaper to launch, and can cover a broader range of latitudes ( geostationary orbits MUST orbit over the equator to be geostationary.  That means at higher latitudes they are lower on the horizon.  At some point they become unusuable, so are not suitable for high bandwidth or reliable communications in places like northern Europe or Russia.) Geo satellites would make EXCELLENT relay satellites for constellations of lower orbiting spacecraft, permitting spacecraft to spacecraft communication. Instead of having to relay between several to get around the globe (*) You could go up to a geo, over to another geo and back down to the other low orbiter and get almost anywhere.  You might need two hops between geos in some circumstances.\n\n(*)which would also require a much more densly populated constellation.  Iridium was named that because the original plan was to have as many satellites as the element Iridium has electrons; 77!
272123
Advantages: stable, low price, firewall, much software\nDisadvantages: not the newest Version from Suse\n\n\nSuse Linux 8.2 is the Suse Version which was sold by Suse 3 years ago. Since this time I use this Suse Version. At the begin I used it on a desctop PC, then on a backup Server, on a Firewall and on a Internet Server. Time to write a review! On my desktop PC I used in the meanwhile Suse 9.0, 9.1 and currently 9.3. The package
468793
Actually a relay IS a switch. There are many on todays cars (relays and switches).\n\nYour question as asked makes no sense. Didn't your HS English teacher tell you never to end a sentence with a preposition?
529880
Advantages - fast creation, easily modified and saves money\n\nDisadvantages - data can be lost or corrupted, needs backing up all the time.
422512
Advantages - learn the nature of competition, learn to socialize, learn teamwork, looks good on college applications\n\nDisadvantages - if you don't know what you're doing or there's an accident you could get hurt
66648
If you ask me, the main advantage is the security and reliability provided by Linux. Windows lacks both\n\nUse the following links to know more\n\nhttp://linux.iguana.be/linux/advantages.php\nwww.linuxplanet.com/linuxplanet/reports/1176/3/\nhttp://www.bretschneidernet.de/linux/advantages.html.en\nwww.uselinuxathome.com/ENwhylinux.htm\nwww.webcabcomponents.com/ solutions/linux/advantages.html
455272
Advantages:\n\nResearch- many things without having to go to library.\nMusic-Listen to any song you want and download them\nFriends-Make friends and chat with people when you want to.\nEmail-fast communication, better then snail mail\nShare-pictures, song, etc, with friends and family\nCommunications-talk for free via messenger (voice) for free\nShop- without leaving your home\n\nDisadvantages:\n\nPo pups- to many pop ups and advertising's\nPorn-too many tasteless sites\nPerverts-Many perverts out there\nPrice-expensive for fast speed\nViruses-frequent virus attacks & expense to maintain\nHackers-vulnerable to hackings and cc theft\nPrivacy- Phone, address, name, etc. can be found by anyone
822904
I use an NPN transistor to turn my relays on/off. See pic...\nhttp://img47.imageshack.us/img47/9813/untitled1ut4.png\nR1=(Voutmax)/(Ioutmax)\n\nThe other option is to use open-collector logic. They use a pulup resistor to what ever voltage you want. This gets sketchy because logic cant handel much current: not to mention the current needed for the relay. See pic...\nhttp://img47.imageshack.us/img47/3778/untitled2vf8.png\nI would use the transistor methoid. Its less trouble then the open-collector methoid. If you need more current through the relay: just decrease the bias resistance.\n\nEDIT: Left_Field is right about the diod. Slipped my mind.
38357
The electrical relay is usually controlled by a very low voltage, usually that of a digital electronics circuit, with a range of 0 to 5 volts.  The relay itself, of course, is also rated to carry a particular maximum analog voltage being controlled by this 'switch'.\n\nTo get a computer to control this, it is probably best to use existing hardware designed to do it.  Back in the 80's (and they are apparently still around) I've used an Optomux board which had a serial interface to which I could connect a computer.  The Optomux serial 'protocol' seemed to work very well for this purpose.\n\nThe computer would send commands over the serial port to control the board to turn relays on and off for controlling pump motors.\n\nIf you want to do this raw, you will definitely need a UART for communication as well as the relays and any interim digital/analog conversion chips.
80708
The advantage is it's free.\n\nThe disadvantage is that is very unsophisticated and gives you very little control as what to allow in or out.\n\nZone Alarm is a much better choice.
162542
AC has less loss over longer distance so is better for wide-area power distribution.  It is also better for high-voltage appliances with high amperage demands (like electric stoves, ovens, dryers, etc.).  Also, before the advent of reliable quartz crystals and such, AC provided a reliable timing source to synchronize signals for televisions (AC in U.S. operates as 60Hz) that is was much more difficult to obtain with DC.\n\nHowever, for local low-voltage, low-amperage power DC is more efficient as most of the types of devices that fit into this category cannot utilize AC directly - they need to convert AC to DC.  It would be more efficient to have a single DC power source using step-down transformers to adjust voltage, than have a bunch of separte AC/DC converters.\n\nIncandescent light bulbs don't care which type of current they are powered from (although LED's do).
258644
Advantages: Less prone to infection, easier to keep clean, religious reasons\n\nDiadvantages: Easier to damage/graze those delicate areas, loss of nerve cells, possible complications in operation, possible loss/effect on frenar ridged band (very sensitive area)
492681
Well one advantage is that without them you wouldn't be able to communicate with your computer, by using your keyboard or mouse, and you wouldn't be able to get a response from the printer or monitor without them.
26771
Advantages compared to what apparatus?? Please be precise...
365054
1) Cost of installing wired connections is much more than that of wireless\n\n2) Greater access to the intranet/internet.
508515
Is it a Single Pole Single Throw or Single Pole Double Throw relay (specify the model and I will send you a simple schematic wiring diagram in your email)? Please specify the exact use of the relay on the Tattoo machine. If used as a power switch only, better buy an ordinary SPST switch which does not require any external power source and can be operated manually. For SPDT relays, you need an external DC supply to enable the coil of the relay in order to switch the contacts to Normally Close (NC) contact point. The relay is defualted at Normally Open (NO) if coil is not energized.