Electronics
LED resistors, voltage dividers, RC/LC and battery-life calculators.
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Voltage Divider Calculator
Calculate the output voltage of a resistor divider.
RC Time Constant Calculator
Calculate the time constant and cutoff of an RC circuit.
Capacitors in Series Calculator
Calculate total capacitance of series capacitors.
Inductive Reactance Calculator
Calculate the reactance of an inductor.
Capacitors in Parallel Calculator
Calculate total capacitance in parallel.
Inductors in Series Calculator
Calculate total inductance in series.
Inductors in Parallel Calculator
Calculate total inductance in parallel.
Capacitive Reactance Calculator
Calculate the reactance of a capacitor.
Wheatstone Bridge Calculator
Find the unknown resistance in a balanced bridge.
Power Dissipation Calculator
Calculate power dissipated by a resistor.
LED Resistor Calculator
Find the resistor needed to drive an LED safely.
Voltage Divider Calculator
Calculate the output voltage of a resistor divider.
Resistor Power Calculator
Calculate the power dissipated by a resistor.
RC Time Constant Calculator
Calculate the time constant of an RC circuit.
LC Resonant Frequency Calculator
Find the resonant frequency of an LC circuit.
Battery Life Calculator
Estimate how long a battery will last.
Series Capacitance Calculator
Calculate total capacitance of capacitors in series.
555 Timer Calculator
Calculate the frequency of a 555 astable circuit.
Transformer Turns Ratio Calculator
Calculate a transformer’s turns ratio.
Decibel Calculator
Convert a power or voltage ratio to decibels.
Antenna Length Calculator
Calculate a quarter-wave antenna length for a frequency.
Power Consumption Calculator
Calculate power draw from voltage and current.