TUTORIAL: How to Measure Current Into Arduino (Microcontroller) Using a DIY Shunt Resistor (Part 3)


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A three-part series on how to measure current into an Arduino or other micro-controller by using a simple resistor only. This is called a shunt resistor. I measure the voltage drop across a resistor and them multiply it by the value of the resistor to work out amperage. I discuss Ohm's law, a bit about the wattage rating of resistors and some other basics. Part 3 shows a demonstration of the info.


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