It has occurred to me that a thread where posters could pass on useful tips, tricks, rules-of-thumb, and conventions that may be of use for when you need a 'how to answer' not an in depth understanding. Please don't use this thread for asking questions.
I will kick off with a very simple but useful formula for making a non standard resistor by adding a parallel resistor to a standard one.
\(R_{1} = \frac{R_{2}R_{d}}{R_{2} - R_{d}}\)
\(R_{1}\) is the required shunt resistor
\(R_{d}\) is the desired non preferred value
\(R_{2}\) is the (next) higher preferred value
I will kick off with a very simple but useful formula for making a non standard resistor by adding a parallel resistor to a standard one.
\(R_{1} = \frac{R_{2}R_{d}}{R_{2} - R_{d}}\)
\(R_{1}\) is the required shunt resistor
\(R_{d}\) is the desired non preferred value
\(R_{2}\) is the (next) higher preferred value
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