How to calculate the value of resistance using colour code ????

 

 

Step 1. Open "www.google.com"
Step 2. Enter "Resistor color codes" in the search window

Result: more than 18,000 hits.

Somewhere there you should find a site that should fulfill your requirement.
Good luck!

 

I got this pdf file from this website, it might be helpful to you .

Attached Files

color code of resistors.pdf (34.1 KB, 11 views)

 

black 0
brown 1
red 2
orange 3
yellow 4
green 5
blue 6
violet 7
grey 8
white 9

the value of the resistor determined by the first three lines.
the value of it is the number of line 1 and line 2 and multiply with 10 to the power of third line. the last line is tolerance.

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Superman returns..

 

Just out of interest, how many of you sight read resistors? I assume anyone who has used them frequently for a while will. By this I mean you don't work it out anymore, you just see it and recognise it right away. I do with most 3 band ones, the more obscure ones may take a moment. Nobody else in my college class ever could though oddly.

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Angry!? I'm absolutely electrolytic!

Will have to make do with myspace now I guess...

 

Like anything else, it comes with practice - but I've been reading them for something like 40 years!.

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PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

You are giving away your age.

Assuming one can do that when one is five or six years old, you must be 50-60 then.

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L.Chung

 

Are you failing maths? 40+6=50 to 60?

I'm 51, I've been doing electronics since I was 9 or 10 - I originally used to write the resistor values I wanted down on a piece of paper, along with the colours they needed to be. I then used to go to a local tip, and hunt for them in old TV sets!.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

I, not being native in English, thought "some 40 years" meant 40+ years and not exactly 40 years.

Actually my experience is that there are only a handful of common resistance values, the real difference is the multiplier. When one gets that, it would be very easy to tell the values apart.

After a few projects, one would easily recognise values like 1K, 2K2, 3K3, 4K7, 5K6.... and different members of their "family".

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L.Chung

 

As you are based in the UK, and your English is excellent (far better than many 'English' residents!), I presumed you were born and raised here?.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

I do.
Although I have to think about the "four band" types, the three band ones are no problem whatsoever.

It is like speaking a foreign language, it needs practice.
40ish years in my case, started about 12 and I am now 57.

JimB

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Experience is directly proportional to the value of the equipment ruined.

 

Not at all. I came to live in the UK several years before the end of last century.

If you look at my postings, you will centainly find many small grammatical errors which are typical of people who speak a different language.

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L.Chung

 

Your errors are less than most of the youth of today!.

However, we're not counting spelling mistakes!

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

I can sight read IF I can make out the actual colors. those 1/8 watt babies are almost impossible to tell and sometimes the red is closer to brown than red. Orange vs dirty yellow is hard too. so I just use my dmm most of the time. funny thing - I can read the numbers on 1206 chip resistors no problem.

the way I remember the codes isn't via some politically incorrect mnemonic (which always seemed hard to remember) but memorise the first 2 (black, brown), rainbow order, then grey, white.

and M Chung, you sell youself short plus you don't use chat-room "english" so I find you welll ahead of the pack when it comes to clear communication.