Atomic Wall Clocks
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 La Crosse Technology WS 8117U IT Atomic Wall Clock Available in Cherry or Oak  US $45.35
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 Oregon Scientific Projection Clock Temp Silver Atomic Fast Ship No Tax MSRP $30 US $9.99
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 PROJECTION CLOCK w WEATHER FORECAST REMOTE TEMPERATURE LaCrosse Technology US $20.50
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 Skyscan Atomic Automatic Clock Outdoor Temperature Black US $39.99
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 Skyscan Atomic Automatic Clock Outdoor Temperature White US $39.99
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 NEW LA CROSSE ATOMIC DIGITAL WALL CLOCK US $20.14
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 La Crosse Technology Atomic Digital Wall Clock US $24.55
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 Lot of 2 Office Wall Clocks Atomic Precision Accur tothe SECOND Sets AUTOMATIC US $31.99
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 115 Black Atomic Wall Clock Radio Controlled Mars 12D NIB US $19.99
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 NEW Hip Cool Projection Clock with Temperature Silver US $19.00
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 2 x Suitcase Combination lock Padlock Quality made US $1.56
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 Atomic Projection Clock Digiview NEW nice Xmas Gift PCRO8W US $24.95
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 Projection Alarm Clock Weather Monitoring LCD System three included sensors US $30.95
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 Sharp SPC315 Atomic Dual Alarm Clock Temperature Sensor Moon Phase Day Date US $39.99 |
 NEW SkyScan Atomic Digital Clock Indoor Outdoor Temp Sensor US $35.95
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 La Crosse Technology Atomic Digital Wall Clock with Temp and Weather Forecast US $37.50
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 SELF SETTING ATOMIC CLOCK THERMOMETER DATE ALARM new in box DELUXE Last one US $28.99
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 JUMBO GIANT DIGITAL ATOMIC WALL CLOCK THERMOMETER US $79.95
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 LA CROSSE TECHNOLOGY RADIO CONTROLLED WALL CLOCK BLK ATOMIC MODEL WT 3102 US $14.99
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 Mid Century Modern Eames Era Wood Spool CLOCK Retro MOD US $49.99
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 New Atomic Bathroom Digital Alarm Clock With suction cup US $41.04
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 Chaney Instrument 5918A Atomix Wall Clock US $13.99
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 GEORGE NELSON CLOCK SUNBURST modern eames era knoll accessories wall decor retro US $149.00
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 Mainstays same as La Crosse solar powered digital atomic wall table clock NEW US $29.95
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 SHARP® ATOMIC DUAL ALARM CLOCK US $33.25
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 SHARP RADIO CONTROLLED ATOMIC WALL CLOCK WITH WIRELESS OUT DOOR WEATHER SENSOR US $17.99
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 Mid Century Modern Eames Era Wood multicolor Spool CLOCK Retro MOD US $49.99
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 115 Black Atomic Wall Clock Radio Controlled Mars 24D NIB US $19.99
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 115 Analog Atomic Clock Radio Controlled Mars 12D NIB US $11.99
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 ATOMIC DUAL ALARM CLOCK with inside outside temp US $39.00
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 La Crosse Technology WS 8418U IT Atomic Digital Wall Clock US $36.72
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 16 Mahogany Finished Atomic Wall Clocks Radio Controlled Venus NIB US $27.99
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 ACCTIM DURHAM RADIO CONTROLLED NATURAL OAK MAHOGANY WALNUT WALL CLOCK US $71.12
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 Cherry Atomic Wall Clock with Moon Indoor Outdoor Temperature WS 8117U IT C US $42.99
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 La Crosse Technology Atomic Digital Wall Clock Red Model WS 8117U IT C US $31.95
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 La Crosse Technology WT 5220U IT Projection Alarm Clock with In Out Temperature US $59.99
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 La Crosse Technology Atomic Digital Wall Clock with Moon Phase Temp US $32.99
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 La Crosse Technology Atomic Digital Wall Clock with Date and Temp Display US $24.99
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 NEW White SkyScan Atomic Digital Clock Indoor Outdoor Temp Sensor US $35.95
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 16 Mahogany Finished Analog Atomic Clock Radio Controlled Venus NIB US $27.99
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 LARGE DIGITAL DISPLAY ATOMIC RADIO CONTROLLED LCD ALARM CLOCK US $38.50
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 La Crosse WT 3181P 18” Outdoor Atomic Analog Wall Clock US $64.99
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 SHARP® ATOMIC DUAL ALARM CLOCK INDOOR AND OUTDOOR TEMPSENSE W WIRELESS SENSOR US $19.99
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 Lacrosse Technology WS 9625TWC IT TCP CLOCK WEATHER STATION US $38.51
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 TEN INCH 10 INDOOR ANALOG ATOMIC WALL CLOCK INDOOR SILVER NEW FREE US SHIPNG US $29.99
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 LaCrosse Technology Atomic Wall Clock 18in Analog WT 3181PL US $59.99
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 BRG Mars Atomic Wall Clock Radio Controlled 12D NIB US $11.99
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 NEW Black SkyScan Atomic Digital Clock Wireless Indoor Outdoor Temp US $35.50
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 USED LA CROSSE TECHNOLOGY 16 ATOMIC ANALOG WALL CLOCK ALUMINUM WT 3126 US $38.50
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 Lacrosse Projection Atomic Alarm Clock Indoor Outdoor Temperature Auto Set DST US $49.95
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 Acctim Stratus Large LED Digital Radio Controlled Desk Wall Clock with Alarm US $47.41
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 La Crosse Technology WT 8005U S Atomic Digital Wall Clock w Temp Silver US $27.74
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 La Crosse WT 3128U WH 12 Atomic Wall Clock w Analog and Digital Display US $35.99
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 Atomic 12 Wall Clock Chicago Light House NIB Great for Home or Office US $9.00
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 La Crosse Technology WT 3128U 12 Inch Atomic Analog Wall Clock with LCD US $41.14
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 Northern Atomic Wall Clock Model WM 1293 BL US $19.99
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 13 1 2 Atomic Wall Clock w temp humt Black gun metal New US $15.99
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 1 Case of BRG Venus Atomic Wall Clocks NIB US $99.99
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 Walnut Wall Clock 12 1 2 Inch Wood Atomic Analog Clock US $46.99
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 14 Staples Atomic Radio Controlled 12 Hour Wall Clock US $25.50
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 1 Case of BRG Mars Atomic Wall Clocks12HR Dial NIB US $119.99
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 Howard Miller 625 429 Techtime lll Atomic Wall Clock US $60.20
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 1 Case of BRG Mars Atomic Wall Clocks24HR Dial NIB US $119.99
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 Timex Atomic Wall Clock Brushed Metal 75329T by Chaney US $49.99
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 DIGITAL ATOMIC WALL CLOCK with IN OUTDOOR TEMP FORECAST US $49.95
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 LaCrosse Atomic Digital Wall Clock w Indoor Temperature US $32.79
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 La Crosse Technology WT 3144P 14 Inch Atomic Wall Clock Pearl US $38.79
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 LA Crosse Technology WT 3181P ATOMIC WALL CLOCK W THERM Kit US $79.84
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 Equity 65906 Large Display Solar Atomic Wall Clock Time Digits Measure 22” US $32.99
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 Lacrosse Technology WT 8005U 9 Inch Digital Atomic Wall Clock l 3 Color US $26.95
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 Howard Miller 625 236 Techtime ll Atomic Clock US $56.35
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 CHICAGO LIGHTHOUSE FOR THE BLIND 67300302 Atomic Slimline Clock Wall Clock US $43.23
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 Timex Atomic Digital Wall Clock no 75322A1 US $33.99
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 Sky Scan Atomic Clock with Indoor Outdoor Temperature Sensor US $36.95
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 Chaney Instrument 18 Aged Metal Wall Clock Thermometer US $49.99
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 Timex Atomic Wall Clock W Wood Accents 75328T Chaney US $49.99
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 Silver Atomic Wall Clock with Moon Phase Indoor Outdoor Temperature US $36.99
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 Clock Radio Controlled Post Office Wall Clock with Cherry Finish 16 Inch US $129.99
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 La Crosse Technology WT 3145A 14 1 2 Inch Atomic Analog Wall Clock with LCD US $50.51
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 La Crosse WT 3161BK 16 Atomic Analog Wall Clock w Stainless Steel Case Black US $59.99
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History of Large Digital Wall Clocks, Before Large Digital Wall Clocks
The large digital wall clock in its form that we recognise today has been around since the middle of the fourteenth century. Before then, measuring the passage of time had always been a tricky affair with the movement of the sun being the only reliable method of time-telling and the only clocks being crude sundials or water clocks.
When the first mechanical clocks appeared they were driven by a spring and weight, regulated by a verge-and-foliot escapement, a type of gear system that advances the gear train at regular intervals or 'ticks'. Not only does a clock ticking come from these original devices but also the familiar clock face was developed.
The first clock to use a minute hand appeared in 1475 and innovations like the pendulum were added making mechanical clocks more and more accurate. Shapes, designs and all sorts of bells, alarms and automaton figures were added to clocks to make them more appealing, the most famous of these being the distinctive cuckoo clock which appeared at the end of the 18th century. No large digital wall clocks back in this time period.
The next big step in the development of clocks didn't arrive until the twentieth century and the development of electronics when it had been noticed that electrical charges running through crystals, such as quartz, made the crystals resonate at an accurate rate.
These large digital wall clocks could use the traditional clock face of mechanical clocks but also were able to replace it with a digital display that showed the time in numbers.
While large digita walll clocks were more accurate than mechanical clocks and even bigger step towards accuracy was taken with the discovery of atomic clocks.
Atomic clocks work on the principle that the caesium -133 atom has an exact resonance each second (somewhere in the region of over 9 billion a second). This makes large digital wall clocks highly accurate; in fact they are even more accurate than the rotation of the Earth which the national timescale GMT (Greenwich Meantime) used to determine noon. Another timescale, UTC (universal Coordinated Time)) which is based on GMT but allows for the Earth slowing in its rotation by adding 'leap seconds' has been developed.
Computer networks use the time from atomic clocks by receiving a specialist transmission of the time through radio waves, the GPS network or over the Internet and can synchronise their networks to this UTC time by utilizing NTP (Network Time Protocol) a protocol specifically designed for synchronization.
Ethernet Clocks can be connected to computer networks that run NTP and can display the exact time as told by an atomic clock and display it on a wall or desk. Other analogue and digital wall clocks can also receive a transmission directly from an absolute time source via radio waves and display UTC time that way. Hence the large digital wall clocks that we have today.,
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