The resistive voltage-divider is a basic circuit that is taught in every introductory electronics course, but problems can arise in its implementation. If you have ever stood in front of a resistor kit while punching values into your calculator, this article is for you. Typical resistor kits do not include every value, so finding an elusive ratio for which both values are commonly available can be a challenge. The small spreadsheet in Figure 1 not only provides a table of 1% resistor values, but also makes it easier to find the ratio you need using two available resistors.
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