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Author Topic: Resistors-which end is +  (Read 9159 times)

Offline montmil

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Resistors-which end is +
« on: November 13, 2009, 06:15:23 PM »
For the electronic mavens, wizards and enthusiasts among us...

Which end of a resistor is the positive (+) end? Thanks for any help.

Monte
Monte Miller
Denton, TEXAS
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Offline Bob_Roller

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Re: Resistors-which end is +
« Reply #1 on: November 13, 2009, 06:20:14 PM »
To the best of my knowledge, there is no polarity with a resistor .
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Offline nhmaf

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Re: Resistors-which end is +
« Reply #2 on: November 13, 2009, 06:42:09 PM »
There is no polarity with a resistor, but if you happen to have "special" type of resistor used in super- precision sensing applications, some are designed to have a current flow direction in a particular way.   IF you're not building something for NASA's next telescope, then no worries, either way 'round is fine.

If you are READING the color code on the resistor, THEN there is a difference which end you start from.
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Offline Rob Valdez 79 R65

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Re: Resistors-which end is +
« Reply #3 on: November 13, 2009, 11:40:17 PM »
When reading the colored bands, don't you start at the end closest to the end of the resistor?

Boy, that was a long time ago!

Correct - no polarity (for us common folk).

Offline montmil

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Re: Resistors-which end is +
« Reply #4 on: November 14, 2009, 04:32:28 AM »
Thanks, gents. No worries now.   Monte
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
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Offline Barry

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Re: Resistors-which end is +
« Reply #5 on: November 14, 2009, 04:37:25 AM »
I was taught this little ditty as an aid to remembering the resistor colour bands as an apprentice nearly 35 years ago.

Ok this is a bit rude but thats how  remembered it!

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« Last Edit: November 14, 2009, 04:50:34 AM by bhodgson »
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Offline montmil

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Re: Resistors-which end is +
« Reply #6 on: November 14, 2009, 04:45:18 AM »
Barry, I was waiting for someone to deliver the line. ::)

Here's another. Gotta be hundreds out there...  Mnemonic, right?

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Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline Barry

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Re: Resistors-which end is +
« Reply #7 on: November 14, 2009, 04:58:31 AM »
Quote
Mnemonic, right?
 

Monte  Your a Scholar I'd have a hard time pronouncing that never mind spelling it.


Quote
For the electronic mavens, wizards and enthusiasts among us...
 

A maven is a trusted expert in a particular field, who seeks to pass knowledge on to others.

I learn't a new word today.  We are all Mavens on this forum !
« Last Edit: November 14, 2009, 05:06:57 AM by bhodgson »
Barry Cheshire, England 79 R45

Offline montmil

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Re: Resistors-which end is +
« Reply #8 on: November 14, 2009, 06:08:20 AM »
I'm married to a 33-year veteran teacher. SWWBO makes me do it again and again until I get it right... if you get my drift. ;)

Monte
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline nhmaf

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Re: Resistors-which end is +
« Reply #9 on: November 14, 2009, 07:50:59 PM »
Seems Monte and I went to the same school of ditties....
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Offline Lucky_Lou

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Re: Resistors-which end is +
« Reply #10 on: November 15, 2009, 02:29:35 PM »
Quote
When reading the colored bands, don't you start at the end closest to the end of the resistor?

Boy, that was a long time ago!

Correct - no polarity (for us common folk).

A very long time ago in a galaxy far far away....
We were taught to put the ring end to positive but theres no reason other than a tidy board unless your going to Mars with it !! its diodes that have to be in the right way if you want them to work.
Lou
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Offline montmil

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Re: Resistors-which end is +
« Reply #11 on: November 15, 2009, 03:19:58 PM »
Quote
Quote
... its diodes that have to be in the right way if you want them to work. Lou

THAT'S what I was thinking of! Thanks, Lou. I owe you a brew. [smiley=beerchug.gif] Check your fax machine.   Monte
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet