Online computer electrical

RedCrab online calculator for calculating electrical values


Ohm's law and power
Wire resistance
Voltage drop
Temperature drift of resistance
Table of temperature coefficients
Internal resistance of a power source
Decibel, votage, power converter
Decibel - factor converter


Alternating voltage values
Alternating voltage and time
Frequency and wavelength
Alternating voltage value and angle
Frequency and periodic time
RMS values of AC voltage

Circuits with resistors

Total resistance of a resistor in parallel
Parallel- total resistance of 2 resistors
Series resistance for a voltmeter
Parallel resistance for an ampere meter
Voltage divider
Loaded voltage divider
Pi Attenuator
T Attenuator

Circuits with capacitors

Capacitance of a capacitor series circuit
Total capacitance and series capacitors
Reactance Xc of a capacitor
Time constant of an R/C circuit (low pass)
Capacitor charging voltage at a time
Capacitor discharge voltage at a time
Series circuit R/C
Parallel circuit R/C
Low pass-filter R/C
High pass-filter R/C
Integrator R/C
Differentiator R/C
Cutoff-frequency R,C
R and C for a given impedance

Circuits with inductors

Reactance of a coil
Cutoff frequency R/L
Differentiator R/L
Highpass filter R/L
Lowpass filter R/L
Series circuit R/L
Parallel circuit R/L

Capacitor and inductors

Resonant frequency f0 calculator
Resistors-capacitors-inductors series circuit
Resistors-capacitors-inductors parallel circuit
Resonance of RCL parallel circuit
Resonance of RCL series circuit


LED resistor
Zener diode resistor (variable)
Zener diode resistor (fix)
more electrical functions are under construction