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Why do electronic components have such odd values? (2021)


If you’ve been around electronics for a while, you’ve probably noticed that components like resistors, capacitors, zener diodes, and inductors come in some odd values. Looking at the chart below, there seems to be no clear rationale behind the values, but there is a pattern.

He spent some time thinking about it and came up with a series of 17 cable sizes that would allow for every type of balloon to be properly moored. Since then, numerous international standards have been adopted by ISO for countless things, but one of those is how we identify certain electronic components. Using the same idea that Renard developed, these components are labeled with what are known as E-series values within the preferred number system.

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