Calculators and tools for Electronics & Electrical Engineering
LED Resistor Calculator
Calculation of a current limiting resistor for one or more LEDs connected in series. This calculator is ideal when you have one or more consecutive LEDs and you need to calculate which resistance resistor needs to be connected to the circuit.
Resistor Color Code Calculator
Calculation of the nominal value and tolerance of resistors by color code
SMD Resistor Code Calculator
Calculation of the resistance of an SMD resistor by code
Inductor Color Code Calculator
Calculation of the nominal value and tolerance of inductors by color code
Ohm's Law Calculator
Calculation of electrical circuit parameters using Ohm's law
Parallel Equivalence Calculator
Calculation of the equivalence value of parallel resistors, capacitors and inductors
Series Equivalence Calculator
Calculation of the equivalence value of series resistors, capacitors and inductors
Voltage Divider Calculator
Calculation of the voltage divider
Battery Life Calculator
Calculation of the battery life of the device from the battery or accumulator
Voltage Regulator Calculator
Calculation of resistors or voltage for LM317, LM338 or LM350 regulators.
Parallel LC Resonant Circuit Calculator
Calculation of the resonant frequency of a parallel LC resonant circuit.
RC Time Constant Calculator
Calculation of the time constant (in seconds) of a resistor–capacitor circuit.
Capacitor Marking Calculator
Calculation of the nominal value of the capacitor according to the marking
Operational Amplifier Calculator
Calculation of operational amplifier parameters
Multivibrator calculator based on NE555
Calculation of the time-consuming components of a multivibrator based on NE555.
Resistor Calculator for Zener Diode
Calculation of a resistor for a zener diode.
Wires Voltage Drop Calculator
Calculation of voltage drop on wires made of various materials of a given length.
Power Dissipation Calculator
Calculation of power dissipation for serial and parallel circuits.