EEVblog #25 - The Infinite Resistor Puzzle

[TunioMir]

Great Video!!

[fingerboy18]

What about a cube? :)

[meiskam]

@GRAHAMAUS i remember reading "The Life Of Pi" about 5 years ago, and it was about some dude lost at sea .. nothing to do with math

[hansolduron]

you know, I counted more than 30 "you know"s half way to the video :)

[flutestarz]

Effective resistance across the single resistor is 2R/M. M is the number of resistors (R) connecting to each junction. For your square mesh M=4. If the 2D mesh was actually a 3D cube, then M=6

[Desmaad]

Behold: the Jones Resistive Gridiron!

[Films4You]

At last Mr. Jones is behind Bars... LOL

[chandin69]

how did a pi come into this?

i just cant picture where the number came from

[GRAHAMAUS]

@chandin69 pi crops up in all sorts of apparently unlikely situations. It's really quite remarkable. Read "The Life Of Pi", it's a fascinating read.

[TheNewoo7]

Retard, Life is Pi talks about something completely different than math. Go read the book

[grlg2]

Hi Dave, This is fantastic (along with all your other videos). I like your comment about practicality and actually doing something as opposed to endless calculations.

Cheers,

Greg.

[wayne205stevens]

Hmm that was neat! I wonder what a cube would work like? I might make one! :)

Nice one Dave!

[Fireviews]

This is pretty nerdy, but it's a nice informative video. You should put it on fireviews so other nerds can see it

[DagGirl]

My friend and I are going to totally make an infinite resistor grid out of 0Ω resistors for the lulz. It'll make a cool necklace and stump people :)

(EEV isn't supposed to be -VEE backwards, is it? :P)

[hla27b]

365 resistors.....

I'd rather do the math

By the way I am reading your "PCB Design Tutorial"

which is simply brilliant

put it on the tube mate

it will be useful to a lot of people on the tube

[NosferatuD]

haahaha! This is sweet... Limits are awesome.

[TelevisionMagazine]

Excellent Dave. Loved that one!

[sidebander]

Excellent!

[holycatsbatman]

Beautiful, elegant, scientific. This is how an engineer solves math puzzles.

[slimair08]

What did he exactly say after .5 an ohm? @1:15

did he say "not .5 *R "

[popson4]

He said "naught", as in zero.

[slimair08]

Thanks much :)

[Danielkwalsh111]

This is fantastic!

[kchida1980]

OMG!! I want to make an infinite resistor rug now. sweet video. you seem like a very productive guy...unlike me...

[TheCynicalAtheist]

This video is absolutely brilliant and hillarious at the same time.

[pizdiceanu]

now,connect the opposing sides like a MOEBIUS band,please

[mtttee2]

I can't believe you actually build that circuit. Sounds a bit stupid to build one but you are right. No point to do the paper work if I didn't compare it with the real world. As always nice one.

[codeprose]

Seeing you love measuring stuff, how about applying a voltage (say 10.000V) to the central resistor, and then measuring the voltage at various locations around the grid.

[JINXZER]

Wow Dave you got almost 5000 views for this video alone, lol I wonder why?

[EEVblog]

It made it onto the Hack-A-Day website, so a huge influx of new viewers and subscribers!

[DirtbagD]

Good video. What about making it in to a cube?

[tomsgypsy]

Really good work mate.

nice to see some fellow aussies getting themselves out there. love hearing measurements in millimeters and grams saves having to try and guess the values the yanks are talking about all the time.

What company are you working at currently?

[gRis1cz]

I wonder what would happen if you connected the opposite sides of the grid. Maybe it would simulate the real infinite grid :-)

[Afrotechmods]

AHahahha!

[hansolduron]

Nice work,

plus more than 50 "you know"s in this video

:)

[neuraxon77]

Cubes and hypercubes next please. :)

[Vlakpage]

I prefer less math and more practical things too :) I was thinking if anyone build it and how large and then you showed it, pretty nice :)

The measurement is close enough, you don't need like 5 digits for most things anyway

[japroach]

hah, beautiful

[ntjbjhq]

Hehehehe, I like this one, nice puzzle and excellent answer to it :)

[Twistx77]

Haha, nice work!