Tell Time Contest

A contest about building unique, creative, or interesting time telling devices.

Tuesday, December 10, 2019 09:00 am PST - Friday, January 24, 2020 09:00 am PST Local time zone:
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The Tell Time Contest challenges you to build an amazing time telling device! We've seen all kinds of clocks from binary to braille, to all manner of Nixie tubes. We want you to build a unique and awesome looking time telling device. 

The Tell Time Contest begins December 10th at 9am PST, and ends January 24th at 9am PST.

Ideally, a clock has a perfect combination of aesthetics and functionality, it is something we want to look at but also to give us important information. Clocks don't have to tell the time on Earth either, they can be counting down, or telling us the time on Mars. 

To be considered for eligibility into this contest, your clock must tell time in some way and have a unit of time measurement. Here on Earth that's hours and seconds, on some other planet it might be quarks and bleeps. There must be a display of some kind to show what the time is. Your clock can be powered in any way you choose: electricity, chemical reaction, mechanical gears are all eligible.

Good luck!

Judging Criteria:
Craftsmanship: Is it constructed well? 
Function: Can you intuitively tell the time from the display? 
Creativity: Is it unique? 

3 winners of $100 prizes. You must have a Paypal account to receive your award in cash. If you do not, you will receive a $100 code for a Tindie gift certificate.

How to enter:
Show off pictures of your clock by documenting it as a new project on Once you have published your project, look in the left sidebar for the "Submit project to..." menu in order to enter it in the Tell Time Contest.

Contest: Rules:
All entries will be judged by Hackaday staff.
Hackaday Staff, Employees of Supplyframe, Judges or the family of any of the preceding are not eligible to be a winner in this contest. Everyone is still encouraged to build awesome stuff and show it off.
Existing projects, or projects that were entered in previous Hackaday contests but did not win a prize are eligible for submission as entries in this challenge. Existing projects that won a prize in previous contests are not eligible. 

View contest log

Enjoy this contest?



helenaroby6553 wrote 07/29/2022 at 15:43 point

Thats great. This was one of the best content and it was also the first one which our team of joined for the first time. As after this contest our team got so much motivation and repeatedly they contributed in different contest.

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Rob Latour wrote 02/06/2020 at 01:31 point

so which clocks won?

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Randy Elwin wrote 02/09/2020 at 22:34 point

...give the judges more "time"...

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Shawn Kovalchick wrote 01/25/2020 at 01:57 point

Darn it.  I can't believe I missed this.  I'm finishing my clock project this weekend. :(

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Michael Möller wrote 12/23/2019 at 15:05 point

No mention of "only one entry per contestant." I have more than one clockdesign. 

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sjm4306 wrote 12/17/2019 at 14:28 point

I think it's reasonable to assume that "display" covers any method of indicating time whether audible, visual, tactile, olfactory, etc (A smell based clock would be interesting).

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Nick Sayer wrote 12/19/2019 at 21:56 point

I should enter our bread machine. :D

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bobgreenwade wrote 12/23/2019 at 15:35 point

It could be done. It'd be a bit imprecise, but work up a project to release a slightly different scent every 15 minutes and you're good to go. (There are scent generators available on the market -- for real!)

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Marcus wrote 12/11/2019 at 22:31 point

I agree. It would seem reasonable to  consider a 'display' as being visual , tactile (like the Braille clock mentioned in the intro), or acoustic, so that the term 'display' really refers to a means of  indicating the time.

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Nick Sayer wrote 12/11/2019 at 20:58 point

I take some issue with "There must be a display of some kind to show what the time is."

One of my entries is a *talking* clock. No display. But it's undeniably a clock.

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