[chbot] Choc Fish Challenge #5

[Synco Reynders]

Mark, Cass,
  I tried Cass's solution (and improvised somewhat after step 1) and
yet would almost say it'd work... my interpretation made an assumption
(battery polarity) and if it was wrong, you'd have a mind-messing job
to re-number everything.
Guess this will create a great discussion at the next robotics meeting.
/s

On 5 September 2011 13:11, Mark Atherton <markaren1 at xtra.co.nz> wrote:
> Cass,
>
> I am not sure if your solution will work, but your reasoning is
> thoroughly excellent.
>
> Well done.
>
> -Mark
>
> At 11:43 a.m. 5/09/2011, you wrote:
>>I work out 2km:
>>
>>At the first end (end A) you connect all the wires together in pairs,
>>leaving 2 unpaired as single conductors, then you attach the negative
>>lead to one of the single wires and the positive to one of the pairs.
>>label the negative wire as 4 and the other unpaired wire as 1, you
>>then walk to the other end (end B). (1km so far)
>>
>>Now at end B you try all the wires with the bulb untill you find the
>>three live wires, you should be able to determine the positive end
>>from the negative by there being two positive wires and only one
>>negative, label the negative wire 4,
>>
>>Now connect the negative wire to one of the other wires that isn't
>>positive, you should be able to find which wire its paired with at end
>>A by another wire in the group becoming negative, label the wire you
>>connected to the negative as 5 and the lead the becomes negative as 6
>>
>>The only wire this wont work for is the unpaired wire you labeled at
>>the other end that wasn't negative. when you find this wire label it
>>as 1 to match the other end and connect it to one of the positive
>>wires, label the two positive wires, label the one connected to wire 1
>>as 2 and the other one as 3.
>>
>>Leaving each connection in place repeat that process of finding the
>>pairs using the new negative lead until all of the wires are connected
>>in series except the three now positive leads (1, 2 and 3). label each
>>new wire you connect as one higher than the last newly found negative
>>wire you labeled and each new negative you find as one higher than
>>that, such that the wires are connected in order, 4 is connected to 5
>>is connected to 6 is connected to 7 etc until all 120 are labeled at
>>end B.
>>
>>Walk back to the end A (now having walked 2km)
>>Now we can determine the order of the positive leads by disconnecting
>>2 and 3 from each other and the positive terminal then by connecting
>>the positive terminal to each of them in turn until you find which is
>>connected to 1. label that wire as 2 and the other as 3. We can forget
>>about these three wires now.
>>
>>Now hooking up one side of the tester bulb straight to the positive
>>terminal of the battery and leaving the negative terminal attached to
>>the original negative wire, 4, disconnect one pair at a time,
>>reconnecting it before trying the next pair, until you find the pair
>>that when you disconnect it, it leaves all the other pairs connected
>>to the negative terminal. (you'll need some exposed conductor where
>>you've bridged wires to test against). You can now label those two
>>wires you have just disconnected, one will still be negative and the
>>other wont, the one that isn't negative is wire 120, and the one that
>>is still negative is 119.
>>
>>Now leaving the newly labeled pair disconnected, repeat this process
>>untill you've found the next pair that leaves the all the pairs still
>>connected to negative, disconnect that pair and label accordingly, one
>>less than the last pair, with the wire that is still connected to
>>negative as the lower number of the two.
>>
>>Repeat the whole process untill you've labelled all of the wires.
>
>
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