Summary of commonly used circuit formulas-circuit formulas that must be met in embedded development-Internet of Things development

I. Introduction

        This article summarizes the calculation formulas often used in the circuit, and will continue to update as the article progresses.

2. Formula

        1> series circuit 

        Current: , the current is equal everywhere in the series circuit

        Voltage: , the total voltage in a series circuit is the sum of the voltages everywhere

        Resistance: , the total resistance in a series circuit is the sum of all resistance values

        ( Resistors in series are compressed according to the resistance ratio )

        2> Parallel circuit 

        Current: , the total current in a series circuit is the sum of the currents everywhere

        Voltage: , the total voltage in the series circuit is equal to the voltage of each main circuit

        resistance:

        ( Resistors connected in parallel are shunted according to the resistance ratio )

        3> Ohm's law

        Formula: , the voltage is equal to the product of current and resistance

        4> Power

        Formula: , can be properly deformed according to Ohm's law