The ultimate geek clock

Thread Starter

cmartinez

Joined Jan 17, 2007
8,768
Wow... I wasn't expecting such an overwhelming response. I'm touched, really. :)

I'm going to mull every post and come back to share some ideas of my own. Many, many thanks to all!
 

AnalogKid

Joined Aug 1, 2013
12,142
A "Zero" is a single dot jumping every half second from corner to corner until it becomes a "1".
I really like this. And -

If an "8" is not the 8 outside dots, but the "7" pattern with the lower center dot added, then "0" can be the 8 outside dots with no moving lights.

ak
 

djsfantasi

Joined Apr 11, 2010
9,237
I’ve seen this somewhere...

An array of LEDs, with each 5 rows containing
5 leds (hours, in either 12 or 24 format)
3 leds (minutes, tens)
4 leds (minutes, ones)
3 leds (seconds, tens)
4 leds (seconds, ones)

The digits are displayed as binary in each row.
 

metermannd

Joined Oct 25, 2020
472
My coworkers gave the tech manager a binary clock when he retired. It was a small one that used green LEDs and was available as a kit back then. Will have to dig out a picture. It had 5 rows - each digit on its own row

Just saw this on the Arduino site: Roman numeral clock
 

ApacheKid

Joined Jan 12, 2015
1,762
Maybe something could be done with this:

1615748856251.png

The high frequency is the minute hand and the low frequency is the hour hand.

The graph represents one rotation of the hour hand.

It seems that wherever the plots cross one another, that's where the hands of the clock would coincide but I'm not sure that's true...
 

Attachments

Tonyr1084

Joined Sep 24, 2015
9,744
If an "8" is not the 8 outside dots, but the "7" pattern with the lower center dot added, then "0" can be the 8 outside dots with no moving lights.
My thinking on the 12 dot matrix using the 8 pattern I chose was to avoid some confusion between the 8 and 12. On the 9 dot matrix there is no easy way to make a zero. So you COULD have absolutely no lights lit for a zero, but then how might you see it in a darkened room? So I chose to keep the 8 patterns the same on both 9 and 12 dot matrices. Both 8's are the same with the exception of one being 12 dot matrix and the other being 9 dot. The moving dots COULD circle the matrix, I just chose the four corners. One could choose any pattern desired.
1615749701987.png1615749712399.png1615750053020.png
 
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AnalogKid

Joined Aug 1, 2013
12,142
On the 9 dot matrix there is no easy way to make a zero.
If the 8 is as I described (all of the bottom row, all of the middle row, plus the two top corners), then a "0" is the only digit that looks almost like a number, a square.

OR - for a 0, light the center LEDs in the four sides to form a diamond; again, a pseudo printed character. OK, I like that one better.

I like a stationary pattern because it doesn't require a uC. Your dice display could be adapted to any digital clock circuit / kit / existing device.

ak
 
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Thread Starter

cmartinez

Joined Jan 17, 2007
8,768
I've been thinking about using a board of pins like this one as a display:

Screenshot_20210314-152151_Amazon Shopping.jpg
The main problem would be finding a feasible technique to individually control each pin.
 

Ya’akov

Joined Jan 27, 2019
10,239
The main problem would be finding a feasible technique to individually control each pin.
How about a linear array of actuators that can do one "line" at a time and moves along the frame like a raster scan. It might be like a storage tube: you set it, the erase it all at once. Maybe using gravity (tilt the frame) or magnets.
 

Thread Starter

cmartinez

Joined Jan 17, 2007
8,768
How about a linear array of actuators that can do one "line" at a time and moves along the frame like a raster scan. It might be like a storage tube: you set it, the erase it all at once. Maybe using gravity (tilt the frame) or magnets.
I've been considering all that... the challenge is that the pins are packed too close together.
 

Tonyr1084

Joined Sep 24, 2015
9,744
If the 8 is as I described (all of the bottom row, all of the middle row, plus the two top corners), then a "0" is the only digit that looks almost like a number, a square.

OR - for a 0, light the center LEDs in the four sides to form a diamond; again, a pseudo printed character. OK, I like that one better.

I like a stationary pattern because it doesn't require a uC. Your dice display could be adapted to any digital clock circuit / kit / existing device.
Truth is - you can utilize any arrangement you like. IF I understand what you're trying to convey - change the 8 to like the right most digit and use any of the first three to represent a zero?
1615764299231.png
 

AnalogKid

Joined Aug 1, 2013
12,142
Truth is - you can utilize any arrangement you like. IF I understand what you're trying to convey - change the 8 to like the right most digit and use any of the first three to represent a zero?
View attachment 232754
Yes. The more I think about it, the more I like the far left image as a 0. I suppose another option is for zero to be a single dot, bottom row, center. Not intuitively obvious, but a very small learning curve.

ak
 
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