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This LED Wall Clock Is Accurate to 1/100th of a Second

by Paul Strauss
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While there are plenty of clocks and watches out there which don’t even have a second hand, I prefer to know the time with at least one second of precision. But that certainly wasn’t good enough for one engineer, who decided he needed decidedly more confidence that he knew the EXACT time.

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What you’re looking at here is what Mixtela claims is the “most precise and accurate wall clock you can get.” The Precision Clock Mk II½ not only uses GPS-synchronized calibration for accuracy, but it displays time down to the 1/100th of a second.

The clock uses an ATtiny controller chip and 18 1″ 7-segment LEDs to display the current year, month, day, and time, and it can alternate between GMT and a time zone of your choice. However, since it has no built-in interface, you’ll need to program its time zone using a cable and a computer. It’s also got global rules for Daylight Savings Time in its code, so it automatically switches at the exact instant of the twice-annual change where applicable. Simply plug it in, and it sorts figures out the time – assuming you have a good GPS signal.

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You can get your hands on a kit version of the Precision Clock Mk II½ from Mixtela’s online shop, but you’ll need to know how to solder and have basic electronics skills to complete the assembly. It’s just £100 GBP (about $128 USD), and you’ll need to specify your default time zone, as the time zone indicator is laser cut to order.



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