Finding the color code value given the maximum and minimum value.

Thread Starter

ElectronicsStudent382

Joined Jul 20, 2017
1
My teacher gave us a test where he gave only the Maximum and Minimum value of the Color Code Value.

How do I find the Color code value with only the Minimum and Maximum value to work with?

Ex. Minimum- 13.5M
Maximum- 16.5M
 

JUNELER

Joined Jul 13, 2015
183
Hi,
given the minimum and maximum value,it seems it is the tolerance in between .
That shows it is about the resistance value of a given resistor.
 

MrChips

Joined Oct 2, 2009
23,240
Your teacher is asking you to calculate the mean value and the tolerance.
Then select the value from one of the standard series, E3, E6, E12, E24, E48, E96 and determine the correct color code.
 

mcgyvr

Joined Oct 15, 2009
5,394
Mean = (Min + Max)/2

Tolerance = Mean / (Mean-Min)

Aren't you supposed to ask your teacher to "teach" you when you don't understand?
Or pay attention better in class when they are actually "teaching"... ;)
 

MrChips

Joined Oct 2, 2009
23,240
Mean = (Min + Max)/2

Tolerance = Mean / (Mean-Min)

Aren't you supposed to ask your teacher to "teach" you when you don't understand?
Or pay attention better in class when they are actually "teaching"... ;)
Shouldn't you have let the TS figure this out on his own?
btw, your formula for Tolerance is incorrect.
 

mcgyvr

Joined Oct 15, 2009
5,394
Shouldn't you have let the TS figure this out on his own?
btw, your formula for Tolerance is incorrect.
Well.. yes there is a "better" formula for the tolerance thats probably taught in school..
Mine works just fine for this example though..
15/1.5 = 10%

And if they could have figured it out on their own they wouldn't have asked the question... ;)
And now I have really given the answer..
I can't assume they are intelligent enough that the only missing piece for them was the words "mean" and "tolerance".. That was very clear to you and me already not them though..
 

MrChips

Joined Oct 2, 2009
23,240
Well.. yes there is a "better" formula for the tolerance thats probably taught in school..
Mine works just fine for this example though..
15/1.5 = 10%

And if they could have figured it out on their own they wouldn't have asked the question... ;)
And now I have really given the answer..
I can't assume they are intelligent enough that the only missing piece for them was the words "mean" and "tolerance".. That was very clear to you and me already not them though..
You just got lucky to get the correct answer for the wrong reason.

Try this instead and see where you made the mistake.

min value = 99
max value = 101
 

MrChips

Joined Oct 2, 2009
23,240
err.. ummm. no
Maybe in Prague.. Heck you should know your factors of 10 stuff since thats what makes the metric stuff great right? :p
err.. you're not even funny... yet totally wrong.:rolleyes:
You didn't even try the example I asked.

If still not convinced, try this example:

min value = 98
max value = 102
 

mcgyvr

Joined Oct 15, 2009
5,394
err... blah blah..
Tolerance = ((mean-min)/mean)*100
((100-98)/100)*100 = 2%

((15-13.5)/15)*100 = 1.5/15*100=10%

Happy now..

Gosh.. you wanted me to "teach" not tell..
What better way then to have them find the mistake... ;)
 
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