Circuits

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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.

How to calculate the spark-extinguishing RC circuit
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.

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.

Pi Attenuator and T Attenuator Calculator
This online calculator allows you to quickly determine the value of resistors in a Pi attenuator or 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.

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 works as a multivibrator i.e. in self-oscillating mode.


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