Page 1 of 2 [22 Posts] Goto page: 1, 2 Next
Author Message
Perplexed_Rug
I THINK I SHOULD TROUT MYSELF
(NAND GATE PUZZLE)

New here...so 'hi board'..

Right. Easy enough puzzle for an engineer although FORGOT to
 Spoiler (Rollover to View): do more than one iteration. once figuring out that I=111 O=T...duh

Now also if
 Spoiler (Rollover to View): PERPLEXED = perplexed in the answers; using any case for this should be wrong because ASCII 'A' does not equal 'a' in binary...so binary for 'the' = 011101000110100001100101 and the binary for 'THE' = 010101000100100001000101 - so Mind Candy requires a box of trout

Posted: Sat Dec 09, 2006 8:58 am
brennagg
nand

 Spoiler (Rollover to View): THE ANSWER IS ELEPHANT

Excellent card....circuit not too hard to figure out but very clever finish involved!!

Posted: Mon Oct 23, 2006 4:59 am
Seej
 jazzychad wrote: How on earth do you construct a puzzle like that? It would take me a lifetime to make a puzzle work correctly like this one... I know Brian lurks around these boards.. any insight on how you did that??

You take a degree in electronics and pay attention to the digital logic/Boolean algebra/finite-state machine parts of the course. It's not that difficult once you know how (and a damn sight easier to get your head around than analogue electronics, what with complex numbers and Fourier transforms and the like....).

The silvers all seem to require some fairly specialised knowledge, so it's difficult to really know how tricky the ones I don't know about actually are, but this one's fairly straightforward - I've designed more complex circuits myself without any trouble.

Posted: Sun Jun 11, 2006 7:31 am
Wow.. what an incredible puzzle. I finally received the card and sat down to solve it. It wasn't that hard to solve, but the real question is...

How on earth do you construct a puzzle like that? It would take me a lifetime to make a puzzle work correctly like this one... I know Brian lurks around these boards.. any insight on how you did that??

Posted: Sat Jun 10, 2006 11:55 am
kizandtango
Heres the map
 227.png Description Filesize 143.66KB Viewed 121 Time(s)

Posted: Fri May 05, 2006 11:35 am
Ashin
Just for completeness:

A NAND gate is essentially an AND-NOT gate conjunction. So:

 Code: Input1     Input2     OutputAND     OutputNAND 0          0          0             1 0          1          0             1 1          0          0             1 1          1          1             0

Even though there are 3 primary logic gates (AND, OR, NOT), the way you actually make these gates out of transistors is not as straight forward. Each one requires 2-3 electrical lines, where as the AND and NAND gates take only 1 line. However, you can build XOR, NXOR, OR, and NOR gates quite easily from NAND gates. So for this reason, the NAND gate is THE building block for the modern computer (and for this puzzle).

Posted: Thu Apr 27, 2006 2:34 pm
Grizy
 Spoiler (Rollover to View): When commenting on the confirmed answer please use spoilers. They are provided so that we can all discuss a puzzle without spoiling it for those don't want to be given the answer.

If you are stuck with a puzzle, don't understand how it was solved, want to find out, why not try logging in on the forum. That shows others that you are a "signed up member" and allows them to PM you with further info.

Grizy gets off soapbox

Posted: Sat Apr 22, 2006 9:59 am
nobody
Elephants.
Computer circuits.

Hmm.

Suggests something to ME...

 Spoiler (Rollover to View): memory

Don't have the card, so can't try it.

Posted: Sat Apr 22, 2006 1:24 am
cupragaz
argh

i really cant work out this card its driving me mad now every search/link i look at for nand's just confuses me even more, can anyone help? cheers

Posted: Fri Apr 21, 2006 4:10 am
midnitegazer
the picture is a close up of 2 capacitors sodered to a circuit board: i have no idea how this connects to elephants

Posted: Thu Apr 20, 2006 3:33 pm
Emptynuke
I think Elephant was a good start, furthermore though, what needs to be done, is we need to figure out what is in t he background, what it has to do with electircal circuits, and elephants. GOOD LUCK WITH THAT lol

Posted: Mon Apr 10, 2006 10:17 pm
SilentlyBroken
*narrows eyes*

 Spoiler (Rollover to View): IT'S NOT A BLOODY ELEPHANT DAMMIT!!

Posted: Mon Apr 10, 2006 1:01 pm
Uhtoff
Lovely puzzle - first silver I've solved without help too

 Spoiler (Rollover to View): Oh, and interestingly enough, initially I got the inputs for the 4th from bottom NAND wrong and it only mattered for the input 011, giving you elethant!

Posted: Sat Apr 08, 2006 7:24 am
colin
nothing to add, but when i saw who did the puzzle, just had to say that is _so_ brian

Posted: Sat Apr 08, 2006 7:24 am
Uhtoff
Can I get someone to tell me what the inputs of the 4th from bottom NAND gate are, it's upper input isn't clear on the scan! Thanks.

Posted: Sat Apr 08, 2006 6:44 am
 Page 1 of 2 [22 Posts] Goto page: 1, 2 Next