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The MagPi Issue 52 Christmas Tree

Posted: Sun Jan 01, 2017 4:26 pm
Hi,

Rather late I know (or early for 2017), I'm looking at the Christmas tree project.

On the image of the back of the tree card which do the characters mean night to the lights?

What does 'FOHN' mean next to the light number? There is also 'FOHN /1', and 'FOHN 05' appears twice.

Thanks

Re: The MagPi Issue 52 Christmas Tree

Posted: Sun Jan 01, 2017 5:14 pm
jonesypeter wrote:What does 'FOHN' mean next to the light number? There is also 'FOHN /1', and 'FOHN 05' appears twice.
I don't know for certain, but if you add 1 to each of the letters it spells out something more familiar. Maybe someone had finger trouble when making the labels?

Re: The MagPi Issue 52 Christmas Tree

Posted: Sun Jan 01, 2017 5:20 pm
Wow, that's a real Agatha Christie style answer, and I think you must be right. Thank you and happy New Year.

Re: The MagPi Issue 52 Christmas Tree

Posted: Sun Jan 01, 2017 6:07 pm
It an interesting write up, but basically on Pg 17 you have green, red and white wires and a single star yellow wire. Which correspond to the same LED colour.
That's all you need, though on the front pictures they are of course blue, yellow and red and a 'star' and have a different amount of LEDs (present picture)

The diagram is just to show you how to stick them down of course, not a printing error at all

The important bit is the star is 14
The others are 7, 8, 12, 15, 16, 18, 20, 23, 24, 25

Re: The MagPi Issue 52 Christmas Tree

Posted: Sun Jan 01, 2017 6:16 pm
If it's not a typo, what does FOHN mean, and the random /1?

Re: The MagPi Issue 52 Christmas Tree

Posted: Sun Jan 01, 2017 6:56 pm
Not typos; they wanted to make a Xmas puzzle - except for two actual typos.

FOHN see above: GPIO in ascii-minus-1
Similarly the numbers - add 11 to them all, apart from 1/ which is a typo and should be 10, which translates to GPIO 21, and the lower 05 which is also a typo and should be 6, or GPIO 7

Re: The MagPi Issue 52 Christmas Tree

Posted: Sun Jan 01, 2017 7:09 pm
I'm not convinced, but thank you for the reply.

Re: The MagPi Issue 52 Christmas Tree

Posted: Sun Jan 01, 2017 7:15 pm
Burngate wrote:Similarly the numbers - add 11 to them all, apart from 1/ which is a typo and should be 10, which translates to GPIO 21
Solidus comes immediately before digit zero in ASCII/Unicode, so 1/ means 20, which fits with the code.

I agree the lower 05 should be 6 meaning 7.

Re: The MagPi Issue 52 Christmas Tree

Posted: Thu Jan 12, 2017 11:24 am
I totally agree, and it could be seen as a bit of a joke about students trying to guess their way through multiple choice exam

Re: The MagPi Issue 52 Christmas Tree

Posted: Fri Jan 13, 2017 4:20 pm
... I have no idea how that happened. It said GPIO when we were checking it. That is bizarre. I'll try and get the PDF fixed

Re: The MagPi Issue 52 Christmas Tree

Posted: Fri Jan 13, 2017 4:43 pm
Thank you. Do I get a prize for spotting it!

Not on purpose then as others thought. It's amazing how one can think up good reasons for anything.

Thanks again.