![]() Mercury has a much lower freezing point (-37.89☏), so these ancient alarm clocks could keep running through the depths of winter. Mercury - Chinese versions of the water clock used mercury instead of water.Modern day hybrid solar alarm clocks, meanwhile, can be powered by sunshine during the day and by a battery at night. Sunshine - Ancient sundials and ‘time sticks’ relied on the shadows cast by the sun.For example, in addition to the water-powered Clepsydra, clocks have made use of: While today’s alarm clocks typically plug into the mains, it’s far from the only source of timekeeping power tried by inventors over the years. The Clepsydra arguably set the tone for alarm clocks to follow, which have subsequently explored variations on how devices can be powered, how they display the passage of time, and the methods they use to wake us up. When engineer Ctesibius added the ability to drop pebbles onto a gong when water reached a certain level, the world’s first alarm clock was born. These clocks were popular in ancient Greece and they worked by allowing water to drip from one container into another below. But for a more personal wake-up call, the alarm clock timeline might start with the water clock, aka the ‘Clepsydra’. These community alarms were designed to rouse anyone with earshot. Find out more about Brandstand’s hotel alarm clocks.Discover h ow Brandstand redesigned the alarm clock.View the illustrated history of the alarm clock.While during the Industrial Revolution, factories sounded ear-splitting whistles to wake nearby workers ahead of their shifts. ![]() In the past, for example, church bells would ring out to signal that it was time to gather for the morning service. The rise of the alarm clock is tied to humanity’s need to be ‘on time’ for events. Mark's Clocktower in Venice to the beeps of the Brandstand CubieTime, the history of the alarm clock is a story where no idea is too crazy. Mankind has spent thousands of years trying to find the best way to wake up on time.
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