Amazon Com Wrenwane Digital Kitchen Timer No Frills Simple Minimalist Clock Magnet
Amazon Com Wrenwane Digital Kitchen Timer No Frills Simple Minimalist Clock Magnet

Latest Minimalist Clock Magnet

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Perfect minimalist clock magnet

Do-it-yourself electronics, particularly digital
clocks, have been in the news this week. And there are a lot of things to talk about with
this story, and from Tumblr to the White House, people are talking about them. But we here
at SciShow were interested in how digital clocks actually work. Well first, you need a power source. That’s
either a battery, or a wire running into the wall. Most consumer digital clocks use an ordinary
plug, with a transformer that steps down the power supply before the current runs into
the clock. Plus, there can be a connection for a nine-volt battery, as a backup power
source. Next, a clock needs a heartbeat — some way
of counting regular intervals in order to keep time. In a traditional pendulum clock, the heartbeat
comes from the swinging of the pendulum. But in a digital clock, this heartbeat can be
generated electronically, in a couple of different ways. It might use a crystal oscillator, for example
— a piece of quartz that vibrates at a regular frequency when it’s attached to an electrical
current. Or, it might use a circuit that counts the
oscillations of the electricity coming through the wire. These oscillations are measured in cycles
per second, using units called Hertz. So if your clock runs at 60 hertz, the electricity
being fed to it is oscillating 60 times per second. Those oscillations are just the regular,
built-in fluctuations in the amount of electricity being fed into the electronics. A digital
clock counts those oscillations to keep time. The third thing you need in a clock is a way
to split up that heartbeat into different units of time. In a mechanical clock, that’s
done with gears: A different set of gears connects the pendulum to the hour hand, the
minute hand, and the second hand, so they each move a different, specific amount as
it swings. Digital clocks don’t have gears, of course.
Instead, they have a chip that counts the heartbeats, then acts like a simple calculator
to divide the number of heartbeats into conventional units of time. So, if you have a signal that pulses 60 times
every second, the chip counts the oscillations, and for every sixty, it records it as one
second having passed. For every 3,600 oscillations, it records a
minute; for every 216,000 — that’s an hour. Now the last thing you need for your clock
is a display, like an LED screen, with a separate circuit that lets it communicate with the
counters.

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That circuit is running its own simple program
that tells the screen what to display based on how much time has passed. When the second counter reaches 10, for example,
the program says to put a “one” and a “zero” in these specific spaces.

And after
the counter reaches 59, it cycles back to zero. And that’s all you need! A power source,
a heartbeat, a counter that can divide up the heartbeat into longer measurements of
time, and a display screen, with its own circuit that tells it what to do with the numbers
generated by the counter. In the world of modern technology, surprisingly
simple. Thanks for taking the time to watch this video,
and thanks especially to this month’s President of Space, S. Foxley. Thank you to all of
our patrons on Patreon who make this show possible. If you want to help us keep making
videos like this, you can go to patreon.com/scishow­. And don’t forget to go to youtube.com/scishow
and subscribe! .

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