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- Time Clocks
- How To Make A Potato Clock
- Ridgeway Grandfather Clock
- Grandfather Clocks - A Brief History
- Antique Clock Buying Tips
- Valuing Antique Grandfather Clocks
- Downloadable clocks
- Cuckoo Clock Collection
- Baird Advertising Clocks
- I got Rhythm
- My Grandfather’s Clock Lyrics
- How The Grandfather Clock Got Its Name
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Time Clocks
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Modern electronic time clocks are fast and quiet in operation and can be used either as a time clock or as a document stamp. Standard features include automatic day, date and month changes and the ability to maintain correct time in the case of power outages.
Atomic time clocks use the latest satellite technology so they can connect and synchronize time to the atomic clock. The benefit is that the time clock never needs resetting, so there is less work involved in maintaining it.
Time Clocks are designed to stamp employee time cards and are straightforward to use. When the empoyee arrives they PUNCH IN and when they leave they PUNCH OUT.
Biometric Time Clocks
Biometric time clocks and attendance systems overcome the main disadvantage of simple electronic time clock being they are subject to errors from inaccurate employee time cards and in particular from so-called “buddy punching”, where one employeee punches the time clock for another employee.
A biometric time clock can use a handprint, or fingerprint or even retina scan system to verify employees’ identities in less than one second, based on their unique characteristics - such as the size and shape of their hands.
A biometric time clock is efficient to administer because there are no cards to create, administer, carry, or lose.
A biometric time clock costs more than a simple electronic time clock, but it returns the investment because it eliminates the costs associated with administrating and managing cards and stops buddy punching and time fraud.
Making a potato clock seems to be a very popular home project at the moment. Instructions on how to make a potato clock of your own are provided below.
I’m fascinated by clocks of all types. I think because the sound of clocks was always in the background when I was growing up. My German grandparents had a beautifully carved cuckoo clock, my English grandparents had a grandfather clock which chimed every quarter hour, my own parents had a mantel clock that had pride of place over the fire and I slept soundly every night soothed by the steady ticking of my bedside alarm clock.
My children now check the time on their mobile phones or in the bottom corner of the PC screen. I love the sight and sound of clocks in public places - Big Ben’s chimes are another fond memory.
Anyway, back to making a potato clock - here are the instructions.
How and why does a Potato Clock work?
The potatoes actually form an electrochemical battery, also known as an electrochemical cell. Basically, the electrochemical cell converts chemical energy to electric energy by a spontaneous electron transfer.
In the particular case of the potato, the zinc in the galvanised nail reacts with the copper wire, with the potato acting as a buffer between the zinc ions and the copper ions.
If the zinc and copper ions touched within the potato they would react but only generate heat. The role of the potato is to keep them apart, so the electron transfer has to take place via the copper wires of the circuit, which channels the electron flow i.e. electricity into the clock.
Supplies Required for the Potato Clock
- two potatoes
- two common galvanized nails
- three pairs of alligator clips connected to one another with wire
- two short pieces of heavy copper wire
- a simple low-voltage LED clock unit that functions from the power of a 1 to 2 volt, button-type battery
Potato Clock Assembly Steps
- Open the LCD clock battery compartment and remove the battery.
(Note that there is a positive (+) and a negative (-) terminal point where the battery was installed.) - Insert one galvanised nail into each of the potatoes.
- Insert one of the short pieces of heavy copper wire into each potato, locating it as far from the nail as possible.
- Use one alligator clipto connect the copper wire inserted in one potato to the positive terminal in the clock unit.
- Use one alligator clip to link the galvanised nail in the other potato to the negative terminal in the clock unit.
- Use the final alligator clip to link the spare galvanised nail in the one potato to the spare copper wire in the other potato.
- Set the clock and you’ve finished.
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