Raspberry Pi Zero W desk clock

Nick Sayer created a LED desk clock driven by NTP on a Raspberry Pi Zero W:

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Raspberry Pi Zero W desk clock

When I was in college, I bought and built a Heathkit GC-1000 WWV clock. Since then, I’ve been somewhat interested in accurate time measurement. I recently designed a GPS driven clock, but sometimes your local WiFi reception is better than GPS (say, indoors). For those circumstances, a clock that gets time from NTP over WiFi would be preferable. The newly released Raspberry Pi Zero W makes this quite a bit simpler to achieve
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Raspberry Pi Zero W desk clock

Chronio DIY Watch

 writes on Hackaday:

Chronio DIY Watch: Slick and Low Power

[Max K] has been testing the battery life of his self-designed watch under real-world conditions. Six months later, the nominally 3 V, 160 mAh CR2025 cell is reading 2.85 V, so the end is near, but that’s quite a feat for a home-engineered smart watch

Chronio DIY Watch

GPS Clock by Nick Sayer

Nick Sayer created this simple desk clock that gets time from GPS:

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GPS Clock

GPS is best known as a ubiquitous, accurate positioning system (obvious from the name), but the way it actually works requires distributing hyper-accurate time information. This makes it possible (and, actually, pretty easy) to make a clock that you never have to set as long as it gets good GPS reception.

Yes, this is way overkill… but GPS is getting so cheap that you might as well.

The source code is available on GitHub:

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Nick has hacked together a tenth digit for the clock:

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Here is a video of the GPS clock in slow motion:

 

GPS Clock by Nick Sayer

Arduino Pro Trinket Bubble Display

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davedarko wrote in his LED displays on Arduinos – a collection project log on hackaday.io:

Arduino Pro Trinket – bubble display

With 4 of HP QDSP-6064 bubble displays in a drawer I felt ready to do something with them and the “Clocks for Social Good” – call on hackaday.com finally got me going

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The design files are available on GitHub:

davedarko has shared the board on OSH Park:

ProTrinket Bubble Display shield

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Order from OSH Park

Arduino Pro Trinket Bubble Display

3 Inch Tall 7-segment Clock

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Kevin Rye decided to build a 15 inch long digital clock after acquiring these 3 inch 7-segment displays.  He documented the project from start to finish:

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I picked up these sweet LUMEX S101D22TR 7-Segment LCDs the other day.

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The PCBs for the hours, minutes, and seconds display modules are identical. They’ll just be wired differently.

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On the driver boards, data flows in from the left out to the next section on the right.

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The source files can be downloaded from:

15inch-LCD-Clock-Source.zip

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3 Inch Tall 7-segment Clock