here is a question that we were asked in electronics class a few years ago, we`de just learned Ohms law. Non of us ever managed to work it out here goes.....

 

Imagine a cube made of (100 Ohm) resistors. so that would be a total of 12 identical resistors.

work out using ohms law, the resistance between the front left bottom corner, and the top right back corner.

A diagonal thing.

 

each edge is a 100 Ohm resistor.

 

I don`t think it`s possible myself using just ohms law, but would love to be shown either way, and certainly the answer!

different ways:

http://home.tiscali.be/kpmoerman/special/special.htm#cube

 

Obviouly the smart way is the one you were supposed to find. Easy when you know the answer. I didn't know it either when that problem was given to me.

(I burried myself under with star to triangle calculations)

Kedas, yer a diamond mate!!!

thnx a bunch for the data, I`ve added that url to my favorites too.

it`s no wonder we could never work it just being taught Ohms law

 

btw, I like the chaos circuit, we used to use something similar for white noise generators (for synths) using Zener Diode breakdown noise through an OP Amp

There`s a neat way using TTL shift registers too, I`ve lost the diag though.

cheers for the site again

Hi

 

This was one of those things I always wanted to solve comprehensively.

 

See the attachment.

 

Regards

Deon

ResCube.txt