Timeline for Distribution of component values with a given tolerance?
Current License: CC BY-SA 3.0
6 events
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| Jan 26, 2012 at 16:47 | comment | added | Al Kepp | When I buy normal 5% resistors, they are actually within 1% of their values. And all items from the same series are almost identical. I suspect that this is due to the particular manufacturing process that a deviation of more than 1% is here possible but actually improbable. | |
| Jan 26, 2012 at 15:28 | history | edited | Olin Lathrop | CC BY-SA 3.0 |
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| Jan 26, 2012 at 14:14 | comment | added | Kellenjb | @olin to second Kortuk, I used to work in a parts shop ordering components. We tended to buy cheap as we sold to students, but in any given pack we ordered, every resistor was almost identical. However, many times they were all at the extreme of the percentage that was advertised. | |
| Jan 26, 2012 at 14:10 | comment | added | Kortuk | @olin, I disagree somewhat, if you order a large number from the same batch their accuracy will be as quoted but their precision is often much better. I have found when buying a large group of 10% resistors the resistors matched eachother within .5%. I agree, you cannot make general assumptions, but this is an affect I would look for in a large batch that is purchased. I will agree you cannot depend on that accuracy in a design. | |
| Jan 26, 2012 at 12:42 | comment | added | clabacchio | I would add that it's because the tolerance is not statistically calculated, but it's likely the result of a post-manufacturing testing process that has to guarantee (at least for spot checks) the respect of the tolerance | |
| Jan 26, 2012 at 12:39 | history | answered | Olin Lathrop | CC BY-SA 3.0 |