Experimenting with RC and RL series circuits using smartphones as signal generators and oscilloscopes

Simple, portable and low-cost experiments as RC RL series circuits are proposed to experiment with DC circuits. Very common elements used: a few electronics components (resistors, capacitors, coils connecting wires) two smartphones. We consider the charging discharging of capacitor in circuit also that coil circuit. Using smartphone an oscilloscope we observe voltages variations which transient response square signal generated second smartphone. These voltage directly related electrostatic or magnetic energy stored The experimental data have been collected used corroborated theoretical predictions based on Kirchhoff’s laws. comparison showed differences order 1% less between calculated capacitance inductance compared manufacturer values. This approach avoids use expensive generators, oscilloscopes, any specialized hardware can be performed less-favored contexts even home assignment.