“This little beauty works great. I bought it when the alarm on my mobile phone began to intermittently fail me. This little travel clock is beautiful in retro seafoam green and great for travel because its bright color ensures that you will never miss picking it up from your hotel nightstand at checkout. There is a faint, pleasant ticking, the hands glow in the dark, and the nightlight button is bright when needed. The pop-up alarm button is firm and works well though I am learning not to accidentally press it and turn the alarm off when picking up the clock. Overall, a fantastic alarm clock.”
Don't worry, Zeus didn't show up to your home, but you'll certainly feel that way when waking up to this unit's thunderous, 113-decibel buzzing. Fair warning: It's definitely loud, so it's a good pick only if you're a heavy, heavy sleeper. Just in case the noise somehow isn't enough to pry you out of bed, this alarm clock flashes multiple bright red LEDs and comes with a bed shaker that'll really get you going. Trust us, if that sensory overload doesn't get the job done, nothing will.

The most accurate mechanical timekeeper is the Shortt pendulum clock; it makes use of the movement described above for electric master clock systems. The Shortt pendulum clock consists of two separate clocks, one of which synchronizes the other. The timekeeping element is a pendulum that swings freely, except that once every half minute it receives an impulse from a gently falling lever. This lever is released by an electrical signal transmitted from its slave clock. After the impulse has been sent, a synchronizing signal is transmitted back to the slave clock that ensures that the impulse to the free pendulum will be released exactly a half minute later than the previous impulse. The pendulum swings in a sealed box in which the air is kept at a constant, low pressure. Shortt clocks in observatories are kept in a room, usually a basement, where the temperature remains nearly constant, and under these conditions they can maintain the correct time to within a few thousandths of a second per day.
No, that’s not a statement - it’s an app title. This little handy dandy game makes you solve puzzles or finish writing exercises before it’ll let you off the hook. If you try to snooze it too many times, it’s going to remember, and put you through hell. It’s like getting interest on the fact that you slept in an extra five minutes the day before. For the love of gear, just solve the puzzle, and muddle through the morning - you’ll be glad you did.
If the four alarms you scheduled to go off 10 minutes apart wake your neighbors but not you, you might want to try this noisy clock; it has a 113-decibel alarm—about as loud as a jackhammer. And if the volume alone won't do it, the red flashing lights and accompanying bed-shaker unit (which goes beneath your mattress) should deliver the full sensory message that grave danger awaits unless you get out of bed.
These mechanical clocks were intended for two main purposes: for signalling and notification (e.g. the timing of services and public events), and for modeling the solar system. The former purpose is administrative, the latter arises naturally given the scholarly interests in astronomy, science, astrology, and how these subjects integrated with the religious philosophy of the time. The astrolabe was used both by astronomers and astrologers, and it was natural to apply a clockwork drive to the rotating plate to produce a working model of the solar system.
This 24" large metal Large Wall Clock is finished in a dark rubbed bronze with aged bronze accents at the 3, 6, 9 and 12 positions. The aged dial features a subtle center pattern, aged black Roman numerals, black spade hour and minute hands and a convex glass crystal. A twisted metal ring frames the dial. Quartz, battery operated movement. One year warranty and Free Shipping.
Spring-driven clocks appeared during the 15th century,[25][26][27] although they are often erroneously credited to Nuremberg watchmaker Peter Henlein (or Henle, or Hele) around 1511.[28][29][30] The earliest existing spring driven clock is the chamber clock given to Phillip the Good, Duke of Burgundy, around 1430, now in the Germanisches Nationalmuseum.[4] Spring power presented clockmakers with a new problem: how to keep the clock movement running at a constant rate as the spring ran down. This resulted in the invention of the stackfreed and the fusee in the 15th century, and many other innovations, down to the invention of the modern going barrel in 1760.
Time flies when you’re having fun, and you’re going to have a great time updated your look with this chic clock. As much an accent as it is a functional tool, this elegant design will instantly elevate any tabletop display. This clock blends modern minimalism with a pop of glam thanks to its solid-toned background, simple white hour marks, and glossy metallic frame. Try setting it on your master suite nightstand, so you can keep your eye on the time during your morning routine. Next, lean...
This large farmhouse wall clock measures 36 inches This large farmhouse wall clock measures 36 inches across the face and features horizontal cedar wood slats a white distressed finish and hand painted black Roman numerals. Finish will vary slightly depending on each unique wood tone and grain pattern. The clock includes a high torque quartz movement antique-style spade ...  More + Product Details Close

Showcasing the time, date, and weather, this clock is an essential for any desk. No need to lift your arm and look at your watch or light up your phone screen, this 0.3'' H x 3.7'' W x 1.5'' D design is an easy way to get the info you need. A vibrant blue backlight keeps it illuminated (requiring the power of a AA battery), while a plastic frame allows it to stand upright.
The apparent position of the Sun in the sky moves over the course of each day, reflecting the rotation of the Earth. Shadows cast by stationary objects move correspondingly, so their positions can be used to indicate the time of day. A sundial shows the time by displaying the position of a shadow on a (usually) flat surface, which has markings that correspond to the hours.[7] Sundials can be horizontal, vertical, or in other orientations. Sundials were widely used in ancient times.[8] With the knowledge of latitude, a well-constructed sundial can measure local solar time with reasonable accuracy, within a minute or two. Sundials continued to be used to monitor the performance of clocks until the modern era.[citation needed]
Similar to our #8 selection, this app uses a gradual brightness increase to slowly wake you out of your sleep, before laying down the hammer and buzzing to wake you up. If you’re waking up angry or abruptly (more on this in a moment), then this is the perfect trick to keep ahead. Just ensure your alarm clock also has a USB charging slot to keep your phone nearby. This works well if you position it differently than your gradual light alarm clock, as if you’re getting two sunrises instead of one.
Islamic civilization is credited with further advancing the accuracy of clocks with elaborate engineering. In 797 (or possibly 801), the Abbasid caliph of Baghdad, Harun al-Rashid, presented Charlemagne with an Asian Elephant named Abul-Abbas together with a "particularly elaborate example" of a water[12] clock. Pope Sylvester II introduced clocks to northern and western Europe around 1000AD[13]

“This alarm clock will wake you up! I’m totally deaf in one ear and partially deaf in the other. Alarm clocks I used before I purchased this one might as well have been turned off if I happened to have my good ear on the pillow when they went off. This one is loud! Now having said that, its loudness is adjustable, and I found that a low setting of two works just fine for me, but if I am particularly concerned about being awakened, I also set the vibrating disk, which is slipped under the mattress. Believe me: Even if you are totally deaf in both ears, this will wake you up. I was skeptical about the vibrator because I have a thick mattress, but it works with no problem at all! I wholeheartedly recommend this alarm clock for anyone who is hearing impaired.”