How do clock motors work?
925766
In a modern clock, a voltage is applied to a crystal such as quartz.  This causes the molecules in the crystal to vibrate at a fixed frequency.  A sensor then counts the vibrations over time and determines how much time has elapsed.
1117824
Pendulums work like this...\n\nhttp://en.wikipedia.org/wiki/Pendulum\n\nNothing magical.  Just simple physics.
994807
A/C current\nClocks and everything use A/C current to keep track of time. This is always exact and time gets taken away or goes ahead gradually. There are time servers out there that your clock can set itself to everyday so you don't loose alot of time.
194412
go to http://en.wikipedia.org/wiki/Wankel_engine#How_it_works
177393
Blank Pictures of alarm clocks.\n\nhttp://www.blackdog.net/games/clock/worksheets/fourclocks.gif
668942
I assume you are talking about Lamport's Logical Clock... Lamport's Clock is a good mechanism for synchronization when we care about only the order that things happen and not the actual time that events occur.\n\nTo do this, each process involved holds a counter. Every time a process sends a message to another, it will increment its counter and send this value in the message. Every time a process receives a message, it updates its clock as the maximum of its value and the received one.\n\nSome pseudo code:\n\nMain Process\n------------\nSpawn some Child Processes\nWhile (Child Processes exist)\n- recieve message from child process\n- check clocks\n- output message with clock time\nExit program\n\nChild Process\n-------------\nWhile (some condition)\n- Create Message data\n- Add one to clock\n- Send data with clock value (recommend passing via a struct)\nExit process
41304
Computers are very good at counting.\n\nThe clock inside the computer is just a counter.  The speed at which it counts is measured in Hertz (that is, cycles per second), or more commonly on computers GigaHertz (Billions of cycles per second).  For each cycle, a counter is incremented.  When the appropriate number of cycles have passed (based on the speed of the computer), then the computer knows that a second has passed.\n\nWhile machines CAN measure time very precisely, your typical PC will only measure it accurately to maybe the 100th of a second.  This is sufficient for most uses.
183820
A generator is basically a motor that works backwards.  \n\nIn a motor, a wire coil is wound around a magnetic core but not attached to it. The magnetic shaft has bearings either end to allow it to rotate. When current goes through the coil it makes the magnet rotate (electromagnetic induction).\n\nIn a generator, the magnet shaft is rotated by a small diesel engine with a pulley and belt.  The movement of the magnet shaft inside the coil induces electrical current in the wire coil.\n\nCheck www.howstuffworks.com for a decent write up with diagrams.
69620
The explanation is shown in the last picture of the page found by thomas.\n\nI think also a degree in maths or physics or so can work to fill the generation gap.\n\n(Actually I think you owe love and devotion to your mom even before the day when elecricity will miss and your clock won't work anymore...)\n\nEach of "hours", "minutes" and "seconds" have two sets of dots to be read in vertical.\nThe first set on the left has only two dots because hours can only reach the number "24", so you don't need the "4" and "8" leds.\n\nThe thing to know (try and believe) is that every number from 1 to 9 (in fact from 1 to 15) can be written as a sum of 1, 2, 4, and 8:\n1= on off off off  (read in vertical from bottom to top)\n2= off on off off\n3= 1+2  so 3 = on on off off \n4= off off on off\n5=1+4= on off on off\n6=2+4= off on on off\n7=1+2+4= on on on off\n8= off off off on\n9= 1+8= on off off on\n\n---To all mums online---\n\np.s.I don't like websites where they teach kids not to respect their parents
1180902
I am sure this link will help you\n\nhttp://66.102.9.104/search?q=cache:PxXilZ_c9ZcJ:www.ittc.ku.edu/~dandrews/files/ERSA2004.pdf+spinlock+or+semaphore+work,+the+processor+implement+a+lock&hl=en&gl=uk&ct=clnk&cd=2
1056518
It comes from old firearms.  Like old-fashioned mechanical alarm clocks, gun have a  tigger that controls a hammer.  When the hammer is at rest, it's "off".  When it's pulled back part way, it's "half-cocked".  When it's pulled back all the way, it's "cocked".  \n\nWhen a gun is cocked or half-cocked, you can squeeze the trigger and slowly easy the hammer back to the off position.  If u do this too quickly, the hammer will cause the gunpowder to fire or "go off".\n\nOld-fashioned mechanical alarms clocks have a hammer that it's a bell repeated to wake someone.  These hammers were pulled back into a cocked position by hand, just like those on a gun.  When a cog in the alaram clock trips the trigger, it causes the hammer to go "off cock" and that's why we refer to an alarm going off.
928585
I think that you mean that your system clock is giving the incorrect time? If this is correct, then the chances are that all that will be required to do, is replace the CMOS battery. It's flat and about the same diameter as a nickle (5cent coin). It will located on your motherboard, and it is easy  to see. Can be bought easily in computer stores, pharmacies, and even $1 stores.
168668
The quartz is a crystal which deforms when an electrical current is introduced. This is the opposite of how a piezo element microphone works; when sound strikes the element ( a crystal similar to quartz) the element deforms and creates an electrical impulse analogous to the vibration caused by the sound.\n\nWhen a steady current is applied to the crystal with the correct feedback circuit, the crystal oscilates at a set frequency. This is in fact how your computer keeps time as well! The entire system (whatever its processor speed is) is governed by a crystal utilizing this exact method.\n\nThe oscilations are then fractioned into larger units of time (since the crystal may oscilate at many millions of vibrations per second) and then coupled to the movement by some type of mechanical transducer.\n\nVery accurate time keeping is created this way.
359418
most motherboards have a watch battery the size of a quarter that runs the clock. the battery may be in need of replacement. some are easy to get to others are buried behind other components. if you are uneasy with opening the pc either forget the clock or take itto a shop, for what shops charge i would live without the clock.
298295
It is a dc motor working in conjunction with an inductor and a quartz crystal.\n\nThe quartz crystal delivers regulated pulses to the inductor which sends a varying magnetic field to a magnet which spins, the motor only needs two poles as the magnetic field changes continuously.
351810
The thermostat is a heat sensor. The commutator is part of the rotor. The brush spring keeps constant pressure on the brush against the rotor, \nThat leaves.... the relay.\nIn small motors a centrifugal switch is used. It's mounted on the rotor shaft. When it reaches speed, the outward force opens the switch and disconnects the start windings.\nIn larger motors like 100 horse power and up, a "part winding start" can be used. Only a small part of the windings are used to start the motors. The starter box has a timer that triggers a relay that engages the rest of the windings when the speed is up.
83655
from  what  i  understand  theres  a  crystal  that  rotates  and  it  is  what  keeps  time--from  a  friend--  if  its  messed  up  the  clock  wont  work  my  98  has  a  messed  up  clock  tho  i  rarely  use  it  so  i  guess  it  dont  matter  there  \n\ni  hear  a  way  to  sinq  clocks  is  leave  it  on  fer  awhile  online  it  should  naturally