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Light programming for a clock
+ So at first glance we were thinking there wasn’t much special about this clock. It’s based on an Arduino and displays the time using a character LCD screen. But then we realized that there’s no...
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Building a CMOS clock on a breadboard
If you’re going to learn digital logic, why not aim high? That’s what [Easton] and his friend did when they built a clock using only 4000-series logic chips. On a breadboard, no less. For a 1 Hz...
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Automatic Daylight Saving Time compensation for your clock projects
Pretty early in development of my Ping Pong Clock I came up with the idea of automatic Daylight Saving Time compensation. It’s an interesting feature, but it’s a luxury and so I figured I could add it...
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How’s the 60Hz coming from your wall?
If you’ve ever wondered why NTSC video is 30 frames and 60 fields a second, it’s because the earliest televisions didn’t have fancy crystal oscillators. The refresh rate of these TVs was controlled by...
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Lite Brites fade, but LED clocks are forever
Ahh, the Lite Brite. What could be more fun than pushing dozens of little plastic pegs through a piece of black paper in order to create a pixelated, though colorful image? Well, I can think of quite...
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Network time clock for a home media center
[Derek] wanted a clock for his media center. A simple wish, but he had a few requirements: he didn’t need an alarm, wanted it to automatically set its time after a power outage, needed a big display,...
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Volt meter clock also displays the temperature
[IronJungle] got around to putting together every tinkerers favorite project: a clock with a strange way of displaying the time. For his clock, [Jungle] took a trio of voltmeters and turned them into...
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An ice tube clock for the TI Launchpad
Because Nixies, Decatrons, and VFD tubes really are that cool, [cubeberg] over on the 43oh forums designed an IV-18 clock for the TI Launchpad. Like adafruit’s Ice Tube clock, [cubeberg]‘s project...
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QR clock is unreadable by humans and computers alike
The clock is a perfect technology. For just a few dollars, you can buy a digital wristwatch and chronometer able to keep extremely accurate time for years without winding a spring or replacing a...
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Scrapped DVD player turns into a full featured clock
[Dmitry] really went the distance with this project. It started as a broken DVD player scrapped for parts, and turned into this clock with way too many features. That link is a pretty a dry technical...
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Clock display taller than you is just what your living room has been missing
Sure, it’s time to get the countdown clocks ready to ring in the new year, but why limit it to just one night? If you end up building a six-foot digital display you can count down trivial events; like...
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Accurate timers with an AVR
An awful lot of microcontroller projects use timers to repeat an action every few minutes, hours, or days. While these timers can be as accurate as a cheap digital wrist watch, there are times when...
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Award clock put to good use as a bench meter
The motivation industry turns out these type of award trinkets by the millions. Here’s a way to actually put the thing to use. Instead of displaying time, the clock dial serves as the readout of a...
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Harry Potter location clock spies on your smart phone
The location clock found in the Harry Potter books makes for a really fun hack. Of course there’s no magic involved, just a set of hardware to monitor your phone’s GPS and a clock face to display it....
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Making a QR clock bigger, cheaper, and better
With the massive response and blog cred from his QR Code clock, [ch00f] felt it was time to step up his game and update his design to a proper commercial product. His new QR clock is bigger, brighter,...
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NES annoyance timer makes no friends at your work
Still trying to solidify that reputation as the office Grinch? This project will let everyone know you’re a complete jerk in no time. It’s called the 8-bit Annoying Person Remover. It detects when...
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Designing and Building a Wooden Mechanical Clock
Electronics are undoubtedly the basis for our modern society. Leaving out transistor-based devices, and a mechanical clock would be one of the most intricate devices man has come up with. As a...
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Twenty two servos and an awesome clock
We can never get enough interesting clock builds, and [ebrithil]‘s servo clock (Deutsche, Google translation) is up there with the best of them. There’s twenty-two servos in this clock, moving time...
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A cable box becomes a network time display
In 2011 [Erkki]‘s DVB box gave up the ghost. It had been a fixture of his media center for quite a while, decoding cable and recording shows faithfully for years. A flaky power supply will bring down...
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The Greenest Wall-Powered Clock
Some of the most inefficient appliances in the home are AC mains-powered clocks. You can’t exactly turn them off and they use a whole lot of energy considering how often they’re looked at. [t3andy]...
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