Building a Word Clock - Part 1: Genetic Algorithms

2011-03-09T22:02:00.006+01:00

UPDATE: part two

UPDATE 11-APR-2012: removed typos (fourty -> forty), changed the :05 times to "o five" (thanks Thopter and Andrew from Hack-A-Day) and added a German circular clock.

UPDATE 12-APR-2012: put the code on github and added an english 10x10 clock.

One day I came by a shop that sold this fancy QLOCKTWO word clock and decided that I want one of these. The only problem is that they cost around 1000€ - which is kind of a lot for a clock. The obvious solution? Build one yourself!

Other Word Clocks

After a little bit of googling I found a couple of people that had already done that.

[Doug Jackson] made one using a etched PCB as stencil for the letters and is even selling kits if you want to build one. He also posted the instructions for building one here and here and here .

A deriavate from [scottbez1] can be found here .

There is a Polish version of the clock from [miswierz] which can be found here

A guy called [Christian] build a German version of the word clock which you can find here

They all have one thing in common (beside having a lot of LEDs and a stencil that is):
they use more or less the same word pattern for the clock - pretty much identical to the QLOCKTWO.

Make it different

First of all I don't like to just copy other peoples work and second I wanted to find out if you can do that different.
The idea is to write a genetic algorithm that actually computes a stencil for the word clock.

Theory

Ok, I'm going to keep this one short. I'm not an expert in GA so feel free to correct me if some details are a little bit fuzzy or just plain wrong.

I just wanted to really understand the GAs and decided to program it completely by myself. For a real problem you would of course use one of the many GA frameworks (JGAP for example)

A GA works on a so called population of candidates. Each candidate represents one possible solution to a given problem. The GA now tries to find a better candidate by modifying or combining candidates in the population.

In order to be able to do that the GA needs something called a fitness function. Basically this function evaluates how good of a solution for the problem the candidate is.

The second thing a GA needs is a set of operations that it can perform on the population in order to create new candidates. This could be the crossover (i.e. combination of two candidates) or the mutation (i.e. random changing of parts of a candidate).

After the GA created a new candidate it calculate its fitness and decides if it keeps it (i.e. put it in the population) or not. By keeping the good and discarding the bad candidates the population evolves and we end up having better and better candidates. Sounds simple enough, lets try it!

GA applied to a word clock

First we need to represent the word clock in a manner that we can work with it. I decided to go with the format

XXXXXXXXXX|XXXXXXXXXX|XXXXXXXXXX|XXXXXXXXXX|XXXXXXXXXX|XXXXXXXXXX|XXXXXXXXXX|XXXXXXXXXX|XXXXXXXXXX|XXXXXXXXXX

with X being a random letter and | being a line break. The example above would be the 10x10 word clock

XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX

The fitness function

So how good is the candidate above? Well obviously its a pretty bad one - it cant represent even a single time. And that's exactly our fitness function: out of all 144 possible times (12 hour clock with 5 minute interval) how many of them can we represent?

The candidate above can represent 0, the one below (for a 11x11 English word clock) can represent 159 out of 144

elevenntsix|sevenfourty|twelvehotwo|eightoneten|threertnine|fivefifteen|twentypastl|fourthytenv|fiftythirty|clockfourty|gtwofiveten

Why 159 out of 144? Well because some times can be written in multiple formats - e.g. 04:10 can be written as "four ten"

elevenntsix|sevenFOURty|twelvehotwo|eightoneTEN|threertnine|fivefifteen|twentypastl|fourthytenv|fiftythirty|clockfourty|gtwofiveten

or as "ten past four"

elevenntsix|sevenfourty|twelvehotwo|eightoneTEN|threertnine|fivefifteen|twentyPASTl|fourthytenv|fiftythirty|clockFOURty|gtwofiveten

The actual algorithm (sources can be find below) uses regular expressions to find out how many times can be represented. For the example above 04:10 would be either .*four.+ten.* or .*ten+*past+*four.*. If the regex matches the time can be represented, if not it can't.

By building a regex for every single time you can check if the clock can represent every time of the day.

You can find all regular expressions at the end of the post.

The operators

I played around with a couple of operators but in the end the following two turned out to be the most useful:

Combination: just take two candidates from the population (prefer the good ones but sometimes also pick bad ones) and combine them together (e.g. take the first 10 characters for the first candidate and the rest from the second)
Word Insertion: pick a random candidate and insert a random word at a random position - with the list of words being given by the times (e.g. "four", "ten", "past", ...)

The Results

Well, the GA works, but sometimes it gets stuck in a local minimum and needs to be reset. But in the end it turned out to work quite well. I used it to generate the 10x10 German word clock that I actually build and to generate the 11x11 English version mentioned above.

I don't exactly know why but it wasn't able to find any english word clock solution smaller than 11x11, maybe I messed things up somewhere. Here is a small JavaScript version of the clock (it doesn't show the real time but you can play around with it)

German 10x10

English 10x10

English 11x11

Actually there is no reason why you couldn't build not rectangular clocks.

Why not build a circular clock?

Or triangular?

Diamond shaped?

Circular clock in German

This are the regular expressions for English and German word clocks.

01:00 : (.*)(one)(.+)(o)(.+)(clock)(.*)
01:05 : (.*)(five)(.+)(past)(.+)(one)(.*)
01:05 : (.*)(one)(.+)(o)(.+)(five)(.*)
01:10 : (.*)(ten)(.+)(past)(.+)(one)(.*)
01:10 : (.*)(one)(.+)(ten)(.*)
01:15 : (.*)(fifteen)(.+)(past)(.+)(one)(.*)
01:15 : (.*)(one)(.+)(fifteen)(.*)
01:15 : (.*)(quarter)(.+)(past)(.+)(one)(.*)
01:20 : (.*)(twenty)(.+)(past)(.+)(one)(.*)
01:20 : (.*)(one)(.+)(twenty)(.*)
01:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(one)(.*)
01:25 : (.*)(one)(.+)(twenty)(.*)(five)(.*)
01:30 : (.*)(thirty)(.+)(past)(.+)(one)(.*)
01:30 : (.*)(one)(.+)(thirty)(.*)
01:30 : (.*)(half)(.+)(past)(.+)(one)(.*)
01:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(one)(.*)
01:35 : (.*)(one)(.+)(thirty)(.*)(five)(.*)
01:40 : (.*)(forty)(.+)(past)(.+)(one)(.*)
01:40 : (.*)(one)(.+)(forty)(.*)
01:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(one)(.*)
01:45 : (.*)(one)(.+)(forty)(.*)(five)(.*)
01:45 : (.*)(quarter)(.+)(to)(.+)(two)(.*)
01:50 : (.*)(fifty)(.+)(past)(.+)(one)(.*)
01:50 : (.*)(one)(.+)(fifty)(.*)
01:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(one)(.*)
01:55 : (.*)(one)(.+)(fifty)(.*)(five)(.*)
02:00 : (.*)(two)(.+)(o)(.+)(clock)(.*)
02:05 : (.*)(five)(.+)(past)(.+)(two)(.*)
02:05 : (.*)(two)(.+)(o)(.+)(five)(.*)
02:10 : (.*)(ten)(.+)(past)(.+)(two)(.*)
02:10 : (.*)(two)(.+)(ten)(.*)
02:15 : (.*)(fifteen)(.+)(past)(.+)(two)(.*)
02:15 : (.*)(two)(.+)(fifteen)(.*)
02:15 : (.*)(quarter)(.+)(past)(.+)(two)(.*)
02:20 : (.*)(twenty)(.+)(past)(.+)(two)(.*)
02:20 : (.*)(two)(.+)(twenty)(.*)
02:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(two)(.*)
02:25 : (.*)(two)(.+)(twenty)(.*)(five)(.*)
02:30 : (.*)(thirty)(.+)(past)(.+)(two)(.*)
02:30 : (.*)(two)(.+)(thirty)(.*)
02:30 : (.*)(half)(.+)(past)(.+)(two)(.*)
02:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(two)(.*)
02:35 : (.*)(two)(.+)(thirty)(.*)(five)(.*)
02:40 : (.*)(forty)(.+)(past)(.+)(two)(.*)
02:40 : (.*)(two)(.+)(forty)(.*)
02:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(two)(.*)
02:45 : (.*)(two)(.+)(forty)(.*)(five)(.*)
02:45 : (.*)(quarter)(.+)(to)(.+)(three)(.*)
02:50 : (.*)(fifty)(.+)(past)(.+)(two)(.*)
02:50 : (.*)(two)(.+)(fifty)(.*)
02:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(two)(.*)
02:55 : (.*)(two)(.+)(fifty)(.*)(five)(.*)
03:00 : (.*)(three)(.+)(o)(.+)(clock)(.*)
03:05 : (.*)(five)(.+)(past)(.+)(three)(.*)
03:05 : (.*)(three)(.+)(o)(.+)(five)(.*)
03:10 : (.*)(ten)(.+)(past)(.+)(three)(.*)
03:10 : (.*)(three)(.+)(ten)(.*)
03:15 : (.*)(fifteen)(.+)(past)(.+)(three)(.*)
03:15 : (.*)(three)(.+)(fifteen)(.*)
03:15 : (.*)(quarter)(.+)(past)(.+)(three)(.*)
03:20 : (.*)(twenty)(.+)(past)(.+)(three)(.*)
03:20 : (.*)(three)(.+)(twenty)(.*)
03:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(three)(.*)
03:25 : (.*)(three)(.+)(twenty)(.*)(five)(.*)
03:30 : (.*)(thirty)(.+)(past)(.+)(three)(.*)
03:30 : (.*)(three)(.+)(thirty)(.*)
03:30 : (.*)(half)(.+)(past)(.+)(three)(.*)
03:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(three)(.*)
03:35 : (.*)(three)(.+)(thirty)(.*)(five)(.*)
03:40 : (.*)(forty)(.+)(past)(.+)(three)(.*)
03:40 : (.*)(three)(.+)(forty)(.*)
03:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(three)(.*)
03:45 : (.*)(three)(.+)(forty)(.*)(five)(.*)
03:45 : (.*)(quarter)(.+)(to)(.+)(four)(.*)
03:50 : (.*)(fifty)(.+)(past)(.+)(three)(.*)
03:50 : (.*)(three)(.+)(fifty)(.*)
03:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(three)(.*)
03:55 : (.*)(three)(.+)(fifty)(.*)(five)(.*)
04:00 : (.*)(four)(.+)(o)(.+)(clock)(.*)
04:05 : (.*)(five)(.+)(past)(.+)(four)(.*)
04:05 : (.*)(four)(.+)(o)(.+)(five)(.*)
04:10 : (.*)(ten)(.+)(past)(.+)(four)(.*)
04:10 : (.*)(four)(.+)(ten)(.*)
04:15 : (.*)(fifteen)(.+)(past)(.+)(four)(.*)
04:15 : (.*)(four)(.+)(fifteen)(.*)
04:15 : (.*)(quarter)(.+)(past)(.+)(four)(.*)
04:20 : (.*)(twenty)(.+)(past)(.+)(four)(.*)
04:20 : (.*)(four)(.+)(twenty)(.*)
04:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(four)(.*)
04:25 : (.*)(four)(.+)(twenty)(.*)(five)(.*)
04:30 : (.*)(thirty)(.+)(past)(.+)(four)(.*)
04:30 : (.*)(four)(.+)(thirty)(.*)
04:30 : (.*)(half)(.+)(past)(.+)(four)(.*)
04:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(four)(.*)
04:35 : (.*)(four)(.+)(thirty)(.*)(five)(.*)
04:40 : (.*)(forty)(.+)(past)(.+)(four)(.*)
04:40 : (.*)(four)(.+)(forty)(.*)
04:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(four)(.*)
04:45 : (.*)(four)(.+)(forty)(.*)(five)(.*)
04:45 : (.*)(quarter)(.+)(to)(.+)(five)(.*)
04:50 : (.*)(fifty)(.+)(past)(.+)(four)(.*)
04:50 : (.*)(four)(.+)(fifty)(.*)
04:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(four)(.*)
04:55 : (.*)(four)(.+)(fifty)(.*)(five)(.*)
05:00 : (.*)(five)(.+)(o)(.+)(clock)(.*)
05:05 : (.*)(five)(.+)(past)(.+)(five)(.*)
05:05 : (.*)(five)(.+)(o)(.+)(five)(.*)
05:10 : (.*)(ten)(.+)(past)(.+)(five)(.*)
05:10 : (.*)(five)(.+)(ten)(.*)
05:15 : (.*)(fifteen)(.+)(past)(.+)(five)(.*)
05:15 : (.*)(five)(.+)(fifteen)(.*)
05:15 : (.*)(quarter)(.+)(past)(.+)(five)(.*)
05:20 : (.*)(twenty)(.+)(past)(.+)(five)(.*)
05:20 : (.*)(five)(.+)(twenty)(.*)
05:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(five)(.*)
05:25 : (.*)(five)(.+)(twenty)(.*)(five)(.*)
05:30 : (.*)(thirty)(.+)(past)(.+)(five)(.*)
05:30 : (.*)(five)(.+)(thirty)(.*)
05:30 : (.*)(half)(.+)(past)(.+)(five)(.*)
05:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(five)(.*)
05:35 : (.*)(five)(.+)(thirty)(.*)(five)(.*)
05:40 : (.*)(forty)(.+)(past)(.+)(five)(.*)
05:40 : (.*)(five)(.+)(forty)(.*)
05:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(five)(.*)
05:45 : (.*)(five)(.+)(forty)(.*)(five)(.*)
05:45 : (.*)(quarter)(.+)(to)(.+)(six)(.*)
05:50 : (.*)(fifty)(.+)(past)(.+)(five)(.*)
05:50 : (.*)(five)(.+)(fifty)(.*)
05:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(five)(.*)
05:55 : (.*)(five)(.+)(fifty)(.*)(five)(.*)
06:00 : (.*)(six)(.+)(o)(.+)(clock)(.*)
06:05 : (.*)(five)(.+)(past)(.+)(six)(.*)
06:05 : (.*)(six)(.+)(o)(.+)(five)(.*)
06:10 : (.*)(ten)(.+)(past)(.+)(six)(.*)
06:10 : (.*)(six)(.+)(ten)(.*)
06:15 : (.*)(fifteen)(.+)(past)(.+)(six)(.*)
06:15 : (.*)(six)(.+)(fifteen)(.*)
06:15 : (.*)(quarter)(.+)(past)(.+)(six)(.*)
06:20 : (.*)(twenty)(.+)(past)(.+)(six)(.*)
06:20 : (.*)(six)(.+)(twenty)(.*)
06:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(six)(.*)
06:25 : (.*)(six)(.+)(twenty)(.*)(five)(.*)
06:30 : (.*)(thirty)(.+)(past)(.+)(six)(.*)
06:30 : (.*)(six)(.+)(thirty)(.*)
06:30 : (.*)(half)(.+)(past)(.+)(six)(.*)
06:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(six)(.*)
06:35 : (.*)(six)(.+)(thirty)(.*)(five)(.*)
06:40 : (.*)(forty)(.+)(past)(.+)(six)(.*)
06:40 : (.*)(six)(.+)(forty)(.*)
06:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(six)(.*)
06:45 : (.*)(six)(.+)(forty)(.*)(five)(.*)
06:45 : (.*)(quarter)(.+)(to)(.+)(seven)(.*)
06:50 : (.*)(fifty)(.+)(past)(.+)(six)(.*)
06:50 : (.*)(six)(.+)(fifty)(.*)
06:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(six)(.*)
06:55 : (.*)(six)(.+)(fifty)(.*)(five)(.*)
07:00 : (.*)(seven)(.+)(o)(.+)(clock)(.*)
07:05 : (.*)(five)(.+)(past)(.+)(seven)(.*)
07:05 : (.*)(seven)(.+)(o)(.+)(five)(.*)
07:10 : (.*)(ten)(.+)(past)(.+)(seven)(.*)
07:10 : (.*)(seven)(.+)(ten)(.*)
07:15 : (.*)(fifteen)(.+)(past)(.+)(seven)(.*)
07:15 : (.*)(seven)(.+)(fifteen)(.*)
07:15 : (.*)(quarter)(.+)(past)(.+)(seven)(.*)
07:20 : (.*)(twenty)(.+)(past)(.+)(seven)(.*)
07:20 : (.*)(seven)(.+)(twenty)(.*)
07:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(seven)(.*)
07:25 : (.*)(seven)(.+)(twenty)(.*)(five)(.*)
07:30 : (.*)(thirty)(.+)(past)(.+)(seven)(.*)
07:30 : (.*)(seven)(.+)(thirty)(.*)
07:30 : (.*)(half)(.+)(past)(.+)(seven)(.*)
07:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(seven)(.*)
07:35 : (.*)(seven)(.+)(thirty)(.*)(five)(.*)
07:40 : (.*)(forty)(.+)(past)(.+)(seven)(.*)
07:40 : (.*)(seven)(.+)(forty)(.*)
07:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(seven)(.*)
07:45 : (.*)(seven)(.+)(forty)(.*)(five)(.*)
07:45 : (.*)(quarter)(.+)(to)(.+)(eight)(.*)
07:50 : (.*)(fifty)(.+)(past)(.+)(seven)(.*)
07:50 : (.*)(seven)(.+)(fifty)(.*)
07:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(seven)(.*)
07:55 : (.*)(seven)(.+)(fifty)(.*)(five)(.*)
08:00 : (.*)(eight)(.+)(o)(.+)(clock)(.*)
08:05 : (.*)(five)(.+)(past)(.+)(eight)(.*)
08:05 : (.*)(eight)(.+)(o)(.+)(five)(.*)
08:10 : (.*)(ten)(.+)(past)(.+)(eight)(.*)
08:10 : (.*)(eight)(.+)(ten)(.*)
08:15 : (.*)(fifteen)(.+)(past)(.+)(eight)(.*)
08:15 : (.*)(eight)(.+)(fifteen)(.*)
08:15 : (.*)(quarter)(.+)(past)(.+)(eight)(.*)
08:20 : (.*)(twenty)(.+)(past)(.+)(eight)(.*)
08:20 : (.*)(eight)(.+)(twenty)(.*)
08:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(eight)(.*)
08:25 : (.*)(eight)(.+)(twenty)(.*)(five)(.*)
08:30 : (.*)(thirty)(.+)(past)(.+)(eight)(.*)
08:30 : (.*)(eight)(.+)(thirty)(.*)
08:30 : (.*)(half)(.+)(past)(.+)(eight)(.*)
08:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(eight)(.*)
08:35 : (.*)(eight)(.+)(thirty)(.*)(five)(.*)
08:40 : (.*)(forty)(.+)(past)(.+)(eight)(.*)
08:40 : (.*)(eight)(.+)(forty)(.*)
08:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(eight)(.*)
08:45 : (.*)(eight)(.+)(forty)(.*)(five)(.*)
08:45 : (.*)(quarter)(.+)(to)(.+)(nine)(.*)
08:50 : (.*)(fifty)(.+)(past)(.+)(eight)(.*)
08:50 : (.*)(eight)(.+)(fifty)(.*)
08:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(eight)(.*)
08:55 : (.*)(eight)(.+)(fifty)(.*)(five)(.*)
09:00 : (.*)(nine)(.+)(o)(.+)(clock)(.*)
09:05 : (.*)(five)(.+)(past)(.+)(nine)(.*)
09:05 : (.*)(nine)(.+)(o)(.+)(five)(.*)
09:10 : (.*)(ten)(.+)(past)(.+)(nine)(.*)
09:10 : (.*)(nine)(.+)(ten)(.*)
09:15 : (.*)(fifteen)(.+)(past)(.+)(nine)(.*)
09:15 : (.*)(nine)(.+)(fifteen)(.*)
09:15 : (.*)(quarter)(.+)(past)(.+)(nine)(.*)
09:20 : (.*)(twenty)(.+)(past)(.+)(nine)(.*)
09:20 : (.*)(nine)(.+)(twenty)(.*)
09:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(nine)(.*)
09:25 : (.*)(nine)(.+)(twenty)(.*)(five)(.*)
09:30 : (.*)(thirty)(.+)(past)(.+)(nine)(.*)
09:30 : (.*)(nine)(.+)(thirty)(.*)
09:30 : (.*)(half)(.+)(past)(.+)(nine)(.*)
09:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(nine)(.*)
09:35 : (.*)(nine)(.+)(thirty)(.*)(five)(.*)
09:40 : (.*)(forty)(.+)(past)(.+)(nine)(.*)
09:40 : (.*)(nine)(.+)(forty)(.*)
09:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(nine)(.*)
09:45 : (.*)(nine)(.+)(forty)(.*)(five)(.*)
09:45 : (.*)(quarter)(.+)(to)(.+)(ten)(.*)
09:50 : (.*)(fifty)(.+)(past)(.+)(nine)(.*)
09:50 : (.*)(nine)(.+)(fifty)(.*)
09:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(nine)(.*)
09:55 : (.*)(nine)(.+)(fifty)(.*)(five)(.*)
10:00 : (.*)(ten)(.+)(o)(.+)(clock)(.*)
10:05 : (.*)(five)(.+)(past)(.+)(ten)(.*)
10:05 : (.*)(ten)(.+)(o)(.+)(five)(.*)
10:10 : (.*)(ten)(.+)(past)(.+)(ten)(.*)
10:10 : (.*)(ten)(.+)(ten)(.*)
10:15 : (.*)(fifteen)(.+)(past)(.+)(ten)(.*)
10:15 : (.*)(ten)(.+)(fifteen)(.*)
10:15 : (.*)(quarter)(.+)(past)(.+)(ten)(.*)
10:20 : (.*)(twenty)(.+)(past)(.+)(ten)(.*)
10:20 : (.*)(ten)(.+)(twenty)(.*)
10:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(ten)(.*)
10:25 : (.*)(ten)(.+)(twenty)(.*)(five)(.*)
10:30 : (.*)(thirty)(.+)(past)(.+)(ten)(.*)
10:30 : (.*)(ten)(.+)(thirty)(.*)
10:30 : (.*)(half)(.+)(past)(.+)(ten)(.*)
10:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(ten)(.*)
10:35 : (.*)(ten)(.+)(thirty)(.*)(five)(.*)
10:40 : (.*)(forty)(.+)(past)(.+)(ten)(.*)
10:40 : (.*)(ten)(.+)(forty)(.*)
10:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(ten)(.*)
10:45 : (.*)(ten)(.+)(forty)(.*)(five)(.*)
10:45 : (.*)(quarter)(.+)(to)(.+)(eleven)(.*)
10:50 : (.*)(fifty)(.+)(past)(.+)(ten)(.*)
10:50 : (.*)(ten)(.+)(fifty)(.*)
10:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(ten)(.*)
10:55 : (.*)(ten)(.+)(fifty)(.*)(five)(.*)
11:00 : (.*)(eleven)(.+)(o)(.+)(clock)(.*)
11:05 : (.*)(five)(.+)(past)(.+)(eleven)(.*)
11:05 : (.*)(eleven)(.+)(o)(.+)(five)(.*)
11:10 : (.*)(ten)(.+)(past)(.+)(eleven)(.*)
11:10 : (.*)(eleven)(.+)(ten)(.*)
11:15 : (.*)(fifteen)(.+)(past)(.+)(eleven)(.*)
11:15 : (.*)(eleven)(.+)(fifteen)(.*)
11:15 : (.*)(quarter)(.+)(past)(.+)(eleven)(.*)
11:20 : (.*)(twenty)(.+)(past)(.+)(eleven)(.*)
11:20 : (.*)(eleven)(.+)(twenty)(.*)
11:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(eleven)(.*)
11:25 : (.*)(eleven)(.+)(twenty)(.*)(five)(.*)
11:30 : (.*)(thirty)(.+)(past)(.+)(eleven)(.*)
11:30 : (.*)(eleven)(.+)(thirty)(.*)
11:30 : (.*)(half)(.+)(past)(.+)(eleven)(.*)
11:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(eleven)(.*)
11:35 : (.*)(eleven)(.+)(thirty)(.*)(five)(.*)
11:40 : (.*)(forty)(.+)(past)(.+)(eleven)(.*)
11:40 : (.*)(eleven)(.+)(forty)(.*)
11:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(eleven)(.*)
11:45 : (.*)(eleven)(.+)(forty)(.*)(five)(.*)
11:45 : (.*)(quarter)(.+)(to)(.+)(twelve)(.*)
11:50 : (.*)(fifty)(.+)(past)(.+)(eleven)(.*)
11:50 : (.*)(eleven)(.+)(fifty)(.*)
11:55 : (.*)(fifty)(.*)(five)(.+)(past)(.+)(eleven)(.*)
11:55 : (.*)(eleven)(.+)(fifty)(.*)(five)(.*)
12:00 : (.*)(twelve)(.+)(o)(.+)(clock)(.*)
12:05 : (.*)(five)(.+)(past)(.+)(twelve)(.*)
12:05 : (.*)(twelve)(.+)(o)(.+)(five)(.*)
12:10 : (.*)(ten)(.+)(past)(.+)(twelve)(.*)
12:10 : (.*)(twelve)(.+)(ten)(.*)
12:15 : (.*)(fifteen)(.+)(past)(.+)(twelve)(.*)
12:15 : (.*)(twelve)(.+)(fifteen)(.*)
12:15 : (.*)(quarter)(.+)(past)(.+)(twelve)(.*)
12:20 : (.*)(twenty)(.+)(past)(.+)(twelve)(.*)
12:20 : (.*)(twelve)(.+)(twenty)(.*)
12:25 : (.*)(twenty)(.*)(five)(.+)(past)(.+)(twelve)(.*)
12:25 : (.*)(twelve)(.+)(twenty)(.*)(five)(.*)
12:30 : (.*)(thirty)(.+)(past)(.+)(twelve)(.*)
12:30 : (.*)(twelve)(.+)(thirty)(.*)
12:30 : (.*)(half)(.+)(past)(.+)(twelve)(.*)
12:35 : (.*)(thirty)(.*)(five)(.+)(past)(.+)(twelve)(.*)
12:35 : (.*)(twelve)(.+)(thirty)(.*)(five)(.*)
12:40 : (.*)(forty)(.+)(past)(.+)(twelve)(.*)
12:40 : (.*)(twelve)(.+)(forty)(.*)
12:45 : (.*)(forty)(.*)(five)(.+)(past)(.+)(twelve)(.*)
12:45 : (.*)(twelve)(.+)(forty)(.*)(five)(.*)
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12:35 : (.*)(fünf)(.+)(nach)(.+)(halb)(.+)(eins)(.*)
12:40 : (.*)(zwölf)(.+)(uhr)(.+)(vierzig)(.*)
12:40 : (.*)(zwanzig)(.+)(vor)(.+)(eins)(.*)
12:40 : (.*)(zehn)(.+)(nach)(.+)(halb)(.+)(eins)(.*)
12:45 : (.*)(zwölf)(.+)(uhr)(.+)(fünf)(.*)(und)(.*)(vierzig)(.*)
12:45 : (.*)(drei)(.*)(viertel)(.+)(eins)(.*)
12:50 : (.*)(zwölf)(.+)(uhr)(.+)(fünfzig)(.*)
12:50 : (.*)(zehn)(.+)(vor)(.+)(eins)(.*)
12:55 : (.*)(zwölf)(.+)(uhr)(.+)(fünf)(.*)(und)(.*)(fünfzig)(.*)
12:55 : (.*)(fünf)(.+)(vor)(.+)(eins)(.*)

Downloads

Thats the Java source code for the genetic algorithm - but be warned, it's just a hack and is by no means a usable program.

It's a multi-threaded console application that saves the state every couple of generations in an XML file - so it can be started and stopped without loosing data.

GenAlg.java is the main file, within its run() you can switch the language between English and German. The file Candidate.java contains the initial pattern for the word clock, just change it and the GA will try to find a solution for that clock.

The program will output a line on the console every couple of generations. It contains information about the current best solution, most importantly the number of times that the clock can display and the nuber it can't (labeled "ok" and "nok").

You can download the source code for the GA from github.

Miniature Giant Space Hamster

DIY Lamp

Building a Word Clock - Part 2: Electronics

LED Matrix Driver

There, I Fixed It