How do quartz watches keep time? Steve Mould gives a great demonstration explaining how they work. Quartz is piezoelectric, which means when it is deformed it generates an electrical signal. A quartz watch has a tiny quartz tuning fork that's been calibrated to vibrate at 215 cycles per second. This signal is fed through a series of 14 flip-flop circuits, each of which divides the frequency of the signal by 2. By the time the signal goes through the 14th flip-flop, the frequency is one cycle per second.
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9:18 am Fri
May 24, 2019
How a quartz watch works
How an automatic rice cooker works
How do rice cookers know when rice has been cooked? The host of Technology Connections explains.
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Why should you read Dune?
This episode of TED-Ed is about Frank Herbert’s 1965 science fiction novel, Dune, and why you should read it. A mother and son trek across an endless desert. Wearing special suits to dissipate heat and recycle moisture, the travelers aren’t worried about dying of thirst. Their fears are much greater. Soon, the sound of the […]
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What would happen if you dodged the draft in the United States?
In 1951 the United States government passed a law requiring all men between the ages of 18 to 26 to register for the draft. During the Korean War (1950-1953) 80,000 men attempted to dodge the draft. During the Vietnam War (1955 – 1975) over 570,000 men dodged the draft, 210,000 of them were formally accused, […]
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Score of 2TB of cloud storage plus organization for just $49
From OneDrive to Slack, there are numerous ways to store files online. Because many platforms offer a certain amount of free storage, it makes sense to mix and match. However, spreading your files across multiple apps can make things very confusing. Rethink Files offers a simple solution. By connecting to all your other cloud storage […]
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This smart golf simulator lets you practice your swing at home
Winter can be a difficult time of year for golfers. Between the freezing temperatures and frequent snow showers, maintaining your handicap can seem almost impossible. When the fairways are frozen solid, the PhiGolf simulator lets you practice at home. This device captures every nuance of your swing to provide virtual coaching. Better still, you can […]
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Get the most out of Photoshop with this $12 master class
Photoshop is one of the most widely used photo editing tools out there, to the point that it’s the default program designers think of whenever they need work done. Small wonder, too: The flagship software in Adobe’s creative suite is very powerful — if you know how to use it. There is a lot to […]
