Électronique
Circuit analysis, RF/microwave, signal processing, embedded systems, and power electronics calculators.
Calculateur de la Loi d'Ohm
Apply Ohm's Law to find voltage, current, or resistance in a circuit. Enter any two values to solve for the third.
Calculateur de Résistance pour LED
Calculate the correct current-limiting resistor for an LED circuit to prevent burnout.
Calculateur de Diviseur de Tension
Calculate the output voltage of a resistive voltage divider network given two resistor values and input voltage.
Calculateur de Circuit Série
Calculate how current splits between two parallel branches using the current divider rule.
Calculateur de Circuit Série
Calculate total resistance, current, and voltage drops in a series circuit with up to three resistors.
Calculateur de Circuit Parallèle
Find the equivalent resistance of two resistors in parallel and the branch currents.
Calculateur d'Équivalent de Thévenin
Analyze a Wheatstone bridge circuit to find the bridge voltage and determine balance condition.
Calculateur d'Équivalent de Norton
Apply Kirchhoff's Voltage Law to verify that voltage drops around a loop sum to the source voltage.
Calculateur de Transfert de Puissance Maximum
Apply Kirchhoff's Current Law at a node to verify that currents in equal currents out.
Calculateur de Résistance de Fil
Calculate the Thevenin equivalent voltage and resistance for a simple source-divider circuit.
Calculateur d'Intensité Admissible du Fil
Calculate Norton equivalent current and resistance from a simple source-resistor circuit.
Calculateur de Dimensionnement de Fusible
Find the load resistance for maximum power delivery and the maximum power from a Thevenin source.
Calculateur de Dissipation de Puissance
Estimate wire resistance based on AWG gauge, length, and copper resistivity.
Calculateur de Code Couleur des Résistances
Estimate safe current-carrying capacity of copper wire based on AWG gauge.
Calculateur de Tolérance de Résistance
Determine the correct fuse rating based on operating current and safety margin.
Calculateur de Code Résistance CMS
Calculate power dissipated by a component from voltage and current.
Calculateur de Sortie de Potentiomètre
Decode a 4-band resistor color code to find its resistance value.
Calculateur de Charge de Condensateur
Calculate the actual resistance range given nominal value and tolerance percentage.
Calculateur d'Énergie de Condensateur
Decode a 3-digit SMD resistor marking to find resistance.
Calculateur d'Impédance de Condensateur
Calculate the output voltage of a potentiometer at a given wiper position.
Calculateur de Charge de Condensateur
Calculate the charge stored in a capacitor given voltage and capacitance using Q = C x V.
Calculateur de Condensateurs en Série
Calculate the energy stored in a capacitor from capacitance and voltage.
Calculateur d'Énergie d'Inductance
Calculate the AC impedance (reactance) of a capacitor at a given frequency.
Calculateur d'Impédance d'Inductance
Calculate the total capacitance of capacitors connected in parallel.
Calculateur d'Inductances en Parallèle
Calculate the total capacitance of two capacitors connected in series.
Calculateur d'Inductances en Série
Calculate the energy stored in an inductor from inductance and current.
Calculateur de Résonance LC
Calculate the AC impedance (reactance) of an inductor at a given frequency.
Calculateur de Circuit RLC
Calculate total inductance of two inductors in parallel (no mutual coupling).
Calculateur de Fréquence de Coupure RC
Calculate total inductance of inductors connected in series (no mutual coupling).
Calculateur de Résonance LC
Calculate the resonant frequency of an LC circuit from inductance and capacitance.
Calculateur de Filtre Passe-Bande
Analyze a series RLC circuit: resonant frequency, impedance, and damping factor.
Calculateur de Filtre Coupe-Bande
Calculate the -3 dB cutoff frequency of a simple RC low-pass or high-pass filter.
Calculateur de Temps de Décharge de Condensateur
Calculate the -3 dB cutoff frequency of an RL filter.
Calculateur de Constante de Temps d'Inductance
Calculate center frequency and bandwidth of a series RLC bandpass filter.
Calculateur de Facteur de Qualité
Calculate the notch (rejection) frequency of a parallel LC notch filter.
Calculateur d'Effet de Peau
Calculate the RC time constant and time to discharge to a target voltage.
Calculateur d'Adaptation d'Impédance
Calculate the RL time constant for an inductor-resistor circuit.
Calculateur de Tension Directe de Diode
Calculate the quality factor (Q) of a series RLC resonant circuit.
Calculateur de Régulateur Zener
Calculate the skin depth in a conductor at a given frequency, which determines effective current-carrying area at high frequencies.
Calculateur de Polarisation de Transistor
Calculate L-network component values to match source impedance to load impedance.
Calculateur de Puissance MOSFET
Estimate the voltage remaining after a diode drop in a circuit. Enter supply voltage, diode forward voltage, and load current.
Calculateur de Gain d'AOP Inverseur
Design a simple zener diode voltage regulator. Calculate the series resistor value and power ratings.
Calculateur de Gain d'AOP Non-Inverseur
Calculate the base resistor for a BJT in common-emitter configuration to set a target collector current.
Calculateur de Bande Passante d'AOP
Calculate MOSFET conduction losses from on-resistance and drain current plus switching losses.
Calculateur de Gain d'Ampli-Op Inverseur
Calculate voltage gain and output of an inverting op-amp configuration from feedback and input resistors.
Calculateur d'Amplificateur Sommateur
Calculate voltage gain and output of a non-inverting op-amp configuration.
Calculateur de Suiveur de Tension
Calculate closed-loop bandwidth of an op-amp circuit from its gain-bandwidth product and gain setting.
Calculateur d'Hystérésis de Comparateur
Calculate the output of a single op-amp differential amplifier with matched resistor pairs.
Calculateur de Trigger de Schmitt
Calculate the output voltage of an inverting summing amplifier with up to three inputs.
Calculateur de Timer 555 Astable
Analyze a voltage follower (unity-gain buffer) showing output voltage, input impedance boost, and current capability.
Calculateur de Timer 555 Monostable
Calculate the upper and lower trip points for a comparator with positive feedback hysteresis.
Calculateur de Rapport Cyclique PWM
Calculate the upper and lower switching thresholds of an inverting Schmitt trigger built with an op-amp.
Calculateur de Temporisateur 555 Astable
Calculate frequency, period, and duty cycle for a 555 timer in astable (free-running) mode.
Calculateur de Décharge de Batterie
Calculate the output pulse width for a 555 timer in monostable (one-shot) mode.
Calculateur de Dimensionnement de Panneau Solaire
Calculate the average output voltage and power delivery of a PWM signal given duty cycle and amplitude.
Calculateur d'Autonomie de Batterie
Estimate how long a battery will last given its capacity and the load current draw.
Calculateur de Chaleur de Régulateur de Tension
Calculate the required discharge current to drain a battery in a specified time, and the energy delivered.
Calculateur d'Efficacité de Régulateur Linéaire
Calculate the solar panel wattage needed to charge a battery or run a load given daily energy needs and sun hours.
Calculateur d'Efficacité de Régulateur à Découpage
Calculate the inverter size needed for your AC loads, accounting for surge requirements and efficiency.
Calculateur de Rapport de Spires de Transformateur
Calculate power dissipated as heat by a linear voltage regulator and the resulting junction temperature.
Calculateur d'Ondulation d'Alimentation
Calculate the efficiency of a linear voltage regulator from input and output voltages.
Calculateur de Condensateur de Découplage
Calculate the input power and current draw of a switching regulator given output requirements and efficiency.
Calculateur de Rapport de Transformation
Calculate transformer turns ratio, secondary voltage, and secondary current from primary specifications.
Calculateur de Résolution CNA
Calculate the output ripple voltage of a capacitor-filtered rectifier power supply.
Calculateur de Fréquence de Nyquist
Calculate the minimum decoupling capacitance needed to limit voltage droop during a transient current spike.
Calculateur de Débit Binaire
Calculate the voltage resolution (LSB size) and dynamic range of an analog-to-digital converter.
Calculateur de Débit en Bauds
Calculate the output voltage step size and maximum output of a digital-to-analog converter.
Calculateur de Largeur de Piste PCB
Calculate the minimum sampling rate needed to faithfully capture a signal using the Nyquist-Shannon theorem.
Calculateur de Courant de Via PCB
Calculate the data bit rate for a digital signal from sampling rate, bit depth, and number of channels.
Calculateur de Résistance Thermique
Calculate the relationship between baud rate (symbol rate) and bit rate for digital communication links.
Calculateur de Largeur de Piste PCB
Calculate the minimum PCB trace width for a given current using IPC-2221 guidelines.
Calculateur de Longueur d'Antenne
Estimate the current carrying capacity of a PCB via based on its dimensions and allowed temperature rise.
Calculateur Fréquence-Longueur d'Onde
Calculate junction temperature through a chain of thermal resistances from junction to ambient.
Calculateur d'Impédance Coaxiale
Calculate the maximum allowed heat sink thermal resistance to keep a component within temperature limits.
Calculateur de Longueur d'Antenne
Calculate the physical length of dipole and quarter-wave antennas for a given frequency.
Calculateur de Puissance RF en dBm
Convert between frequency and wavelength for electromagnetic waves in free space.
Calculateur de Facteur de Bruit
Calculate the characteristic impedance of a coaxial cable from its dimensions and dielectric constant.
Calculateur de Gain d'Antenne
Calculate propagation delay and electrical length of a transmission line from physical length and velocity factor.
Calculateur d'Affaiblissement en Espace Libre
Convert between watts and dBm for RF power measurements, and calculate voltage into a given impedance.
Calculateur de Bilan de Liaison
Calculate the cascaded noise figure of a receiver chain using the Friis formula.
Calculateur de Facteur de Bruit en Cascade
Calculate the gain of a parabolic dish antenna from its diameter and operating frequency using the standard aperture formula.
Calculateur de Profondeur de Peau
Calculate the signal attenuation over distance in free space using the Friis transmission equation.
Calculateur d'Adaptation d'Impédance RF
Calculate a radio link budget to determine whether a wireless link will close by summing gains and subtracting losses.
Calculateur de TOS
Calculate the overall noise figure of a cascaded receiver chain using the Friis noise formula with up to three stages.
Skin Depth Calculator
Calculate the skin depth (penetration depth) of electromagnetic waves in a conductor at a given frequency.
Impedance Matching Calculator
Design an L-network impedance matching circuit to transform one impedance to another at a given frequency.
VSWR Calculator
Calculate the Voltage Standing Wave Ratio from load and characteristic impedance, or from reflection coefficient.
Return Loss Calculator
Calculate return loss in dB from VSWR or reflection coefficient, and convert between mismatch metrics.
S-Parameter Conversion Calculator
Convert S-parameter magnitudes between linear and dB, and calculate derived metrics like insertion loss and isolation.
Transmission Line Impedance Calculator
Calculate the characteristic impedance of a coaxial cable from its physical dimensions and dielectric constant.
Nyquist Frequency Calculator
Calculate the Nyquist frequency (maximum signal frequency that can be represented) from the sampling rate.
Sampling Rate Calculator
Calculate the minimum sampling rate needed to capture a signal without aliasing, with optional oversampling ratio.
Aliasing Frequency Calculator
Calculate the apparent (aliased) frequency when a signal above the Nyquist limit is sampled.
FFT Resolution Calculator
Calculate the frequency resolution, number of bins, and maximum frequency of a Fast Fourier Transform.
Window Function Bandwidth Calculator
Compare the equivalent noise bandwidth and main lobe width for common window functions used in spectral analysis.
SNR Calculator
Calculate the signal-to-noise ratio in decibels from signal and noise power or voltage levels.
Total Harmonic Distortion Calculator
Calculate THD from the amplitudes of harmonic components relative to the fundamental frequency.
Dynamic Range Calculator
Calculate the dynamic range of a system from its maximum signal level and noise floor.
Quantization Noise Calculator
Calculate the theoretical SNR and noise level introduced by analog-to-digital quantization.
DAC Resolution Calculator
Calculate the voltage resolution, step size, and output range of a digital-to-analog converter.
Clock Frequency Calculator
Calculate clock period, instruction throughput, and timer settings from an oscillator or PLL frequency.
Duty Cycle Calculator
Calculate the duty cycle of a periodic signal from its on-time and period, or frequency and pulse width.
PWM Voltage Calculator
Calculate the average (DC equivalent) voltage output from a PWM signal based on duty cycle and peak voltage.
ADC Resolution Calculator
Calculate the voltage resolution, step size, and digital output code of an analog-to-digital converter.
SPI Data Rate Calculator
Calculate SPI bus data throughput from clock speed and transfer parameters.
I2C Pull-Up Resistor Calculator
Calculate the optimal pull-up resistor value for I2C bus lines based on bus capacitance and supply voltage.
UART Baud Rate Calculator
Calculate UART bit timing, actual baud rate from divider settings, and baud rate error.
Memory Address Space Calculator
Calculate the total addressable memory from the number of address lines and data bus width.
Stack Size Calculator
Estimate the required stack size for an embedded application based on call depth, local variables, and interrupt overhead.
Interrupt Latency Calculator
Calculate the total interrupt response latency from detection to start of ISR execution.
Transformer Turns Ratio Calculator
Calculate transformer turns ratio, secondary voltage, and current from primary and secondary winding parameters.
Three-Phase Power Calculator
Calculate real, reactive, and apparent power in a balanced three-phase AC system.
Power Factor Correction Calculator
Calculate the capacitor bank size needed to improve power factor to a target value, reducing reactive power charges.
Motor Starting Current Calculator
Calculate the inrush (starting) current of an electric motor from its nameplate data and starting method.
Cable Ampacity Calculator
Estimate the current-carrying capacity (ampacity) of a copper conductor based on cross-section area and installation method.
Short Circuit Current Calculator
Estimate the prospective short-circuit current at a point in the electrical system from transformer and cable impedance.
Ground Fault Current Calculator
Estimate ground fault current magnitude from system voltage and ground path impedance.
Harmonic Filter Calculator
Calculate the tuning capacitor and inductor values for a single-tuned passive harmonic filter.
Surge Protection Calculator
Calculate the energy absorption requirements and clamping voltage for surge protection devices (SPDs).
UPS Battery Sizing Calculator
Calculate the battery capacity needed for an uninterruptible power supply to support a load for a specified runtime.