Circuits

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3 Phase Calculator

3 phase calculator is an easy-to-use online tool to quickly determine the parameters of balanced three-phase circuits in both Delta and Star configurations. A balanced 3-phase circuit has the same voltages, currents, and power factors in all three phases.

High Pass Filter Calculator
High pass filter calculator is an easy-to-use tool to quickly determine the cutoff frequency of a high pass passive filter. This tool allows you to choose filter circuit: RC filter or RL filter.
Ideal Transformer Calculator
Ideal transformer calculator is an easy-to-use online tool which helps engineers to determine the parameters of the ideal transformer.
Instrumentation Amplifier Calculator
Instrumentation amplifier calculator is an online engineering tool to help you determine the output voltage of a instrumentation amplifier based on an operational amplifier.
LC Circuit Resonant Frequency Calculator
LC circuit resonant frequency calculator is an easy-to-use tool to quickly determine the resonant frequency of an LC circuit (also called a resonant circuit) which contains only an inductor and a capacitor, in parallel or series.
LM317, LM350, LM338 voltage regulator or current limiter calculator
This calculator is an online tool to quickly determine the resistor value required to use the LM317 / LM350 / LM338 as a voltage regulator circuit or current limiter circuit.
Low Pass Filter Calculator
Low pass filter calculator is an easy-to-use tool to quickly determine the cutoff frequency of a low pass passive filter. This tool allows you to choose filter circuit: RC filter or RL filter.
Ohm's Law Calculator
Ohm's law calculator is an easy-to-use online tool to help you find the relationships between electric current (I), voltage (V) and resistance (R) across a given conductor. This tool allows you to calculate power (P) as well.
Op Amp Differential Amplifier Calculator
Differential amplifier calculator is an online engineering tool to help you determine the output voltage of a differential amplifier based on an operational amplifier.
Op Amp Differentiator Calculator
Op amp differentiator calculator is an online engineering tool to help you determine the output voltage of a differentiator based on an operational amplifier.
Op Amp Integrator Calculator
Op amp integrator calculator is an online engineering tool to help you determine the output voltage of a integrator based on an operational amplifier.
Op Amp Square Wave Generator Calculator
Op amp square wave generator calculator is an online engineering tool to help you determine the pulse frequency of the self-oscillating generator (multivibrator) based on an operational amplifier. This tool also displays recommended resistor value as well as resistor and capacitor color coding.
Op Amp Summing Amplifier Calculator
Summing amplifier calculator is an online engineering tool to help you determine the output voltage of a summing amplifier based on an operational amplifier.
Operational Amplifier Gain Calculator
Operational amplifier gain calculator is an online engineering tool to help you determine the voltage gain of an operational amplifier. This calculator supports both inverting and non-inverting operational amplifier circuits. This tool also displays recommended resistor value as well as resistor color coding.
Pi Attenuator, T Attenuator and bridged T Attenuator Calculator
This online calculator allows you to quickly determine the value of resistors in a Pi attenuator, T attenuator or bridged T attenuator circuit. Just enter the desired attenuation (in dB) and impedance (Z) to calculate the needed resistors (R1 and R2) values.
RGB LED Resistor Calculator
This tool allows you to determine which resistors you should use when you have a RGB LED. It displays resistor value, recommended resistor wattage as well as resistor color coding.
Series LED Resistor Calculator
This tool allows you to determine which resistor you should use when you have a single LED or a number of the same color of LEDs in series. It displays resistor value, recommended resistor wattage as well as resistor color coding.
Spark-extinguishing RC circuit calculator
When the relay closes and opens, its contacts can be damaged by the resulting electric discharge arc. To protect them, you can use RC chains installed in parallel with the relay or load. You can calculate the parameters of the elements needed for this here by entering the general characteristics of the circuit.
Square wave generator using IC 555 calculator
This calculator allows you to determine signal parameters of a square pulse generator built on the basis of the popular 555 microcircuit which can operate in astable (self-oscillating) mode.
Square wave generator using IC 555 in monostable mode calculator
This calculator allows you to determine signal parameters of a square pulse generator built on the basis of the popular 555 microcircuit which can operate in monostable mode.
Transformerless Power Supply Calculator
This calculator is an online tool to quickly determine the capacitor value required for transformerless power supply circuit. A simple transformerless power supply with resistive load can be used if there is a need to connect to the AC mains a load designed for a voltage much less than the mains voltage, for example, a soldering iron. In this circuit a capacitor and resistive load are connected in series to AC mains.
Variable frequency square wave generator based on IC 555 calculator
This online engineering calculator allows you to determine signal parameters of a variable frequency square pulse generator built on the basis of the popular 555 microcircuit which can operate in astable (self-oscillating) mode.
Voltage Divider Calculator
Voltage Divider Calculator is a simple easy-to-use tool that helps you evaluate the output voltage or resistors values in a single voltage divider according to Ohm's law.
Voltage Drop Calculator
Voltage drop calculator is an easy-to-use online engineering tool to help you determine what voltage is lost when the electric current moves through a wire. This calculator allows to specify the following factors, which influence the voltage drop: wire material, wire size, wire length, load current.
Zener Voltage Regulator Calculator
Zener voltage regulator calculator allows you to quickly determine the series resistor value of a Zener diode. This tool also displays recommended resistor wattage as well as resistor color coding and SMD resistor code.


Measurement History Events
Yesterday Today Tomorrow
12/13/1816
date of birth
Siemens, Ernst Werner
12/13/1923
date of birth
Anderson, Philip Warren

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