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 Post subject: New resistors color codes ?
PostPosted: May Sun 26, 2019 9:33 am 
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Location: Spain - 28110 - Algete
Just received some item that include spectial color code resistors, so I need to test each one to see the value.
Can some one explain?
i include some pictures and values.

1K
10K
100K


Attachments:
1K.jpg
1K.jpg [ 100.75 KiB | Viewed 871 times ]
10K.JPG
10K.JPG [ 126.82 KiB | Viewed 871 times ]
100K.jpg
100K.jpg [ 115.33 KiB | Viewed 871 times ]
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 Post subject: Re: New resistors color codes ?
PostPosted: May Sun 26, 2019 1:15 pm 
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These are 1% resistors, so they have three significant figures in the resistance value. Tolerance color band is brown for 1%. First three color bands denote resistance value and the fourth band is the multiplier. For example a resistor has yellow, violet, black, red, brown bands. That is 4, 7, 0 times 100; that example is a 47K 1% resistor.


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 Post subject: Re: New resistors color codes ?
PostPosted: May Sun 26, 2019 3:16 pm 
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Location: Seattle WA US
All photos above are flipped, so they read from right to left. OP's question, seems a good one, is how do you know which end to begin reading from ?

-Chuck


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 Post subject: Re: New resistors color codes ?
PostPosted: May Sun 26, 2019 4:35 pm 
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That’s just part of the problem with “new generation” (aka cheap) resistors. I’ve had to experiment with different color temperature lighting sometimes to tell red brown and black apart. Also sometimes orange and yellow are almost indistinguishable

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 Post subject: Re: New resistors color codes ?
PostPosted: May Sun 26, 2019 7:06 pm 
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K7MCG wrote:
how do you know which end to begin reading from ?


This is why God made DMM's... :wink:

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 Post subject: Re: New resistors color codes ?
PostPosted: May Sun 26, 2019 7:30 pm 
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Location: Fernandina Beach, FL
fifties wrote:
K7MCG wrote:
how do you know which end to begin reading from ?


This is why God made DMM's... :wink:

Yes... And I am embarassed to say that everytime I experience these new color codes, I have to break out the Secret Ring Decoder (AKA DMM as noted by Richard) I had no problem with the old codes. Heck, remember when capacitors went to code like 104J instead of .1µFD +-5%?

I think it is a conspiracy...

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 Post subject: Re: New resistors color codes ?
PostPosted: May Mon 27, 2019 3:17 pm 
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I've bought these new Chinese made resistors and their tolerances arn't all that great. The colors arn't bright and distinctive as are in the older carbon resistors and the NTE metal film resistors but they are cheap and you get what you pay for. I still much prefer using NTE resistors but their getting harder to get locally.

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 Post subject: Re: New resistors color codes ?
PostPosted: May Mon 27, 2019 6:56 pm 
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Mica capacitors are the same way; there are so many odd codes, that when I get an unfamiliar one, I reach for the Sencore LC-53 cap meter to see what it reads.

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 Post subject: Re: New resistors color codes ?
PostPosted: May Thu 30, 2019 7:01 pm 
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There are bench DVM's that you can setup to do batch tests on.

They have a tolerance that you can set and can show the actual value or do a PASS/FAIL display. If you don't need to record the exact value but want to stay in limits.

I have Fluke 8840A/AF and an older monster (very Heavy) Fluke 8520. Also have a few handhelds which two of them have voice just in case. :mrgreen:
Now if I only had the time to sort the resistors. :roll:

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 Post subject: Re: New resistors color codes ?
PostPosted: Jun Fri 07, 2019 9:13 pm 
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Radiosmoker wrote:
.......Now if I only had the time to sort the resistors. :roll:

I wanted a stash of 2W metal film resistors and made up a list of the values I thought would be best to have on hand. I then found this guy on eBay selling a package of 500 (5 each of 100 different values) 2W metal film resistors. While his assortment had 30 or 40 values I wasn’t interested in, it still had 5 each of the values I wanted, so I ordered that set (from Hong Kong).

I had gotten a similar set of (10 each) 1W metal film resistors a few years ago and never organized them, so it was always a hassle whenever I had to search for one of those. I don’t like keeping resistors in the little plastic drawers with movable dividers and Crist Rigotti here on ARF came up with the perfect system (for me) to organize and store these.

The cardboard was free since I have a lot of boxes left over from moving, and the #3 Coin and Small Parts Envelopes were only $12 for 500 when I bought them back in January. My box looks nowhere near as nice as the ones Crist makes, but it is keeping my resistors organized. Now if I can find the box where I packed the 1W resistors I can organize those too.

I find it very easy to find the value I want and if needed I can add extra envelopes. Plus if I am running low I can leave the envelope out to remind me to stock up.

Attachment:
Resistors.jpg
Resistors.jpg [ 238.32 KiB | Viewed 507 times ]


Link to thread that has template to make the box:

viewtopic.php?f=10&t=332513

Link to coin envelopes (price seems to have gone up):

https://www.amazon.com/gp/product/B000Y ... UTF8&psc=1

Link to the resistors I bought:

https://www.ebay.com/itm/100value-500pc ... 2749.l2649

I was very pleased with the resistor kit, all values were there and each value was marked in a tiny separate bag making sorting much easier. And I've since found my stash of 1W resistors and also have them organized. It took a few hours over a couple of days but now I can easily find a resistor that I need without scratching my head over the colors in the code that are hard to tell apart.

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