Bar Clock

No, it's not what adults look at when it is time to go home from the pub! It's just a quirky little adaptation of the clock.
Clocks have come in different shapes and sizes since man first started measuring time. The earliest clocks were candles that had markings down the side that showed how many hours had burnt away. Egyptians used water clocks or even sand clocks. These were small containers with a carefully measured hole that allowed the sand or water to pour away at a measured speed, thus givig a set time until all the water or sand had poured out. These, of course, were really timers rather than clocks that measured hours of the day.
Of course, we measure day by dividing up the hours of sunlight into equal parts. Midday is when the sun appears to have travelled half way across the sky and this can be measured more accurately by the shadow that is cast.
Sundials were very popular with the Victorians and are often used as decorative features in gardens and around stately homes. The major disadvantage is that on a cloudy day it is hard to make out where the sun is in the sky and the shadow becomes blurred or to faint to see.
What we know as a clock has only really been around for a few hundred years. The Analogue clock (the one with hands) is the most common form and has been used to create watches as well. The mechanism inside this type of clock is so accurate that clockwork has been used to power many things - including a radio!
With the harnassing of electricity, it has become possible to power clocks without the need of cogs and springs and, of course, we can now project clocks onto screens instead of the traditional face and hands.
In the 1980s Digital watches became very popular as an alternative to the analogue clock-face and was believed to be easier to read.
Now, with computers, clocks can take on any form. The following clock is made up of bars for each measurement of time - hours, minutes, seconds.
How easy to read do you think it is?
You could try making your own clocks. Maybe you could build your own water or sand timer.
Once you have tested your device, take a photo of it, using a digital camera, and let us see what you have done.
Clickhere to send us your digital photos.

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