resistor color code watch

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some more binary clocks
davedarko • 07/24/2018 at 22:53 • 0 comments

They kind of belong together, I've taken the neopixel 7 segment display from the "unexpected maker" tindie shop and adapted my code to show on his display.
And since it's a project of a youtuber and a binary clock, here's another video where I've build up the BCD crap clock by David Watts :)
first prototype
davedarko • 05/05/2018 at 16:14 • 0 comments

So it's pretty tough to show grey vs. white and brown vs. orange and I thought to help with that I'll take a WS2812B 4x4 matrix and make it a binary coded decimal clock.

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RandyKC wrote 05/05/2018 at 17:19

I love this project and idea! I am going to go a little “555” on this comment, no disrespect meant by it.

Since colors (gray, black, gold, silver) are so hard to represent using RGB LEDs, would you be better off with an analog watch with a color wheel for the hours? (Using gold and silver for 10 and 11.) Maybe use conventional arms or LEDs for minute and seconds? Analog movements are so energy efficient and even if you used LEDs for the minutes and seconds when you pressed a button you would still have a low power option.

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davedarko wrote 05/05/2018 at 20:21

:) The plan was color encoded decimals on 4 digits at first, so I wouldn't need gold and silver anyway... but with the change of plans making it binary encoded, it kinda works for me like this. I like the mechanical idea but don't know how this could be done in a small manner for a watch.

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K.C. Lee wrote 05/05/2018 at 21:03

4 digits requires 4 rings which means that they should be mapped to 1% or better resistors with 3 significant digits and 1 multiplier.

There shouldn't be gold/silver... Those are for 5% or 10% resistors with only 2 significant digits and 1 multiplier ring while the 4th one is tolerance.

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RandyKC wrote 05/05/2018 at 21:57

It was just a thought I had. To get twelve numbers use the 0-9 for the first 10 numbers (0 maps to 12 o’clock) then add the precision band colors for the othe two. A standard watch face can be used, but with colors instead of numbers. Not Uber-geek (Darko level😉) but still a way of using the color codes and keeping them fresh in memory. If I wanted to mess with people asking the time I could just rotate the watch😀 I was thinking of trying it on a cheap Chinese pocket watch I have.

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davedarko wrote 05/05/2018 at 22:30

ahhh so you mean basically add a rainbow colored clock face to a standard analog watch?

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RandyKC wrote 05/06/2018 at 07:05

yeah, lame I know.

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Dr. Cockroach wrote 05/04/2018 at 00:04

Neat idea :-) Might try that with IO but I would need a backpack ;-)

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John Baichtal wrote 05/03/2018 at 14:48

So I did my own take on the resistor code watch, which is in this upcoming No Starch book... https://nostarch.com/LEDHandbook... but basically I used a pair of 8-LED NeoPixel sticks to show the time, and you have to multiply the position of the LED by the color. So for instance, if it's 4PM (16) you would light up the 4th pixel with a yellow color -- 4x4. I can't wait to see what you do with this project, Dave!

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davedarko wrote 05/03/2018 at 16:42

interesting :) do you have a picture you're allowed to share? so what do you do with 16 LEDs then? I thought about adding seconds as well to make it 6 leds - do you also have the date on there with a full year? Or is this your way of going around white, grey and black?

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John Baichtal wrote 05/06/2018 at 15:42

Here it is... good luck with your project! https://twitter.com/johnbaichtal/status/993153846452084736

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John Baichtal wrote 05/06/2018 at 15:46

Only use Blue, Red, Yellow, and Green as those are the most readily differentiated from each other. Brown is 1, right? But how do you show brown on a LED? For that reason I swapped in Blue for 1.

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davedarko wrote 05/06/2018 at 16:45

My brown sadly is a slightly darker orange and the grey is just a not so white white :D

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deʃhipu wrote 05/03/2018 at 12:04

— What time is it?

— 10kΩ

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davedarko wrote 05/03/2018 at 12:45

resistance to that joke is futile

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K.C. Lee wrote 05/06/2018 at 02:07

Would the time be rounded to the nearest E48, E96 or E192 values? :P

http://logwell.com/tech/components/resistor_values.html

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danjovic wrote 05/03/2018 at 01:29

Great Dave! I love clock projects.

Be sure it can morse transmit the time for color blind people (only joking, :D )

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davedarko wrote 05/03/2018 at 08:22

well it could at least blink a bit for cheating and learning but I think color blind people wouldn't buy a color based clock? but why be exclusive when you can be inclusive :)

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Mike Szczys wrote 05/02/2018 at 18:19

This is a great idea! I'm slow with color codes and this would definitely get me to practice.

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davedarko wrote 05/03/2018 at 00:46

hehe, thanks :)

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resistor color code watch

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some more binary clocks

first prototype

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