电子
Circuit analysis, RF/microwave, signal processing, embedded systems, and power electronics calculators.
欧姆定律计算器
Apply Ohm's Law to find voltage, current, or resistance in a circuit. Enter any two values to solve for the third.
LED限流电阻计算器
Calculate the correct current-limiting resistor for an LED circuit to prevent burnout.
分压器计算器
Calculate the output voltage of a resistive voltage divider network given two resistor values and input voltage.
串联电路计算器
Calculate how current splits between two parallel branches using the current divider rule.
并联电路计算器
Calculate total resistance, current, and voltage drops in a series circuit with up to three resistors.
惠斯通电桥计算器
Find the equivalent resistance of two resistors in parallel and the branch currents.
戴维宁等效电路计算器
Analyze a Wheatstone bridge circuit to find the bridge voltage and determine balance condition.
诺顿等效电路计算器
Apply Kirchhoff's Voltage Law to verify that voltage drops around a loop sum to the source voltage.
最大功率传输计算器
Apply Kirchhoff's Current Law at a node to verify that currents in equal currents out.
导线电阻计算器
Calculate the Thevenin equivalent voltage and resistance for a simple source-divider circuit.
导线载流量计算器
Calculate Norton equivalent current and resistance from a simple source-resistor circuit.
熔断器选型计算器
Find the load resistance for maximum power delivery and the maximum power from a Thevenin source.
功率耗散计算器
Estimate wire resistance based on AWG gauge, length, and copper resistivity.
电阻色环计算器
Estimate safe current-carrying capacity of copper wire based on AWG gauge.
电阻容差计算器
Determine the correct fuse rating based on operating current and safety margin.
贴片电阻代码计算器
Calculate power dissipated by a component from voltage and current.
色环电阻计算器
Decode a 4-band resistor color code to find its resistance value.
电容充电计算器
Calculate the actual resistance range given nominal value and tolerance percentage.
电容储能计算器
Decode a 3-digit SMD resistor marking to find resistance.
电容阻抗计算器
Calculate the output voltage of a potentiometer at a given wiper position.
并联电容计算器
Calculate the charge stored in a capacitor given voltage and capacitance using Q = C x V.
串联电容计算器
Calculate the energy stored in a capacitor from capacitance and voltage.
电感储能计算器
Calculate the AC impedance (reactance) of a capacitor at a given frequency.
电感阻抗计算器
Calculate the total capacitance of capacitors connected in parallel.
并联电感计算器
Calculate the total capacitance of two capacitors connected in series.
串联电感计算器
Calculate the energy stored in an inductor from inductance and current.
LC谐振计算器
Calculate the AC impedance (reactance) of an inductor at a given frequency.
RLC电路计算器
Calculate total inductance of two inductors in parallel (no mutual coupling).
RC滤波器截止频率计算器
Calculate total inductance of inductors connected in series (no mutual coupling).
LC谐振计算器
Calculate the resonant frequency of an LC circuit from inductance and capacitance.
带通滤波器计算器
Analyze a series RLC circuit: resonant frequency, impedance, and damping factor.
陷波滤波器计算器
Calculate the -3 dB cutoff frequency of a simple RC low-pass or high-pass filter.
电容放电时间计算器
Calculate the -3 dB cutoff frequency of an RL filter.
电感时间常数计算器
Calculate center frequency and bandwidth of a series RLC bandpass filter.
品质因数计算器
Calculate the notch (rejection) frequency of a parallel LC notch filter.
趋肤效应计算器
Calculate the RC time constant and time to discharge to a target voltage.
阻抗匹配计算器
Calculate the RL time constant for an inductor-resistor circuit.
二极管正向电压计算器
Calculate the quality factor (Q) of a series RLC resonant circuit.
稳压二极管稳压器计算器
Calculate the skin depth in a conductor at a given frequency, which determines effective current-carrying area at high frequencies.
晶体管偏置计算器
Calculate L-network component values to match source impedance to load impedance.
MOSFET功率计算器
Estimate the voltage remaining after a diode drop in a circuit. Enter supply voltage, diode forward voltage, and load current.
反相运放增益计算器
Design a simple zener diode voltage regulator. Calculate the series resistor value and power ratings.
同相运放增益计算器
Calculate the base resistor for a BJT in common-emitter configuration to set a target collector current.
运放带宽计算器
Calculate MOSFET conduction losses from on-resistance and drain current plus switching losses.
反相运放增益计算器
Calculate voltage gain and output of an inverting op-amp configuration from feedback and input resistors.
加法器放大器计算器
Calculate voltage gain and output of a non-inverting op-amp configuration.
电压跟随器计算器
Calculate closed-loop bandwidth of an op-amp circuit from its gain-bandwidth product and gain setting.
比较器迟滞计算器
Calculate the output of a single op-amp differential amplifier with matched resistor pairs.
施密特触发器计算器
Calculate the output voltage of an inverting summing amplifier with up to three inputs.
555定时器无稳态计算器
Analyze a voltage follower (unity-gain buffer) showing output voltage, input impedance boost, and current capability.
555定时器单稳态计算器
Calculate the upper and lower trip points for a comparator with positive feedback hysteresis.
PWM占空比计算器
Calculate the upper and lower switching thresholds of an inverting Schmitt trigger built with an op-amp.
555定时器无稳态计算器
Calculate frequency, period, and duty cycle for a 555 timer in astable (free-running) mode.
电池放电计算器
Calculate the output pulse width for a 555 timer in monostable (one-shot) mode.
太阳能板选型计算器
Calculate the average output voltage and power delivery of a PWM signal given duty cycle and amplitude.
电池续航计算器
Estimate how long a battery will last given its capacity and the load current draw.
稳压器散热计算器
Calculate the required discharge current to drain a battery in a specified time, and the energy delivered.
线性稳压器效率计算器
Calculate the solar panel wattage needed to charge a battery or run a load given daily energy needs and sun hours.
开关稳压器效率计算器
Calculate the inverter size needed for your AC loads, accounting for surge requirements and efficiency.
变压器匝比计算器
Calculate power dissipated as heat by a linear voltage regulator and the resulting junction temperature.
电源纹波计算器
Calculate the efficiency of a linear voltage regulator from input and output voltages.
去耦电容计算器
Calculate the input power and current draw of a switching regulator given output requirements and efficiency.
ADC分辨率计算器
Calculate transformer turns ratio, secondary voltage, and secondary current from primary specifications.
DAC分辨率计算器
Calculate the output ripple voltage of a capacitor-filtered rectifier power supply.
奈奎斯特采样率计算器
Calculate the minimum decoupling capacitance needed to limit voltage droop during a transient current spike.
ADC分辨率计算器
Calculate the voltage resolution (LSB size) and dynamic range of an analog-to-digital converter.
波特率计算器
Calculate the output voltage step size and maximum output of a digital-to-analog converter.
PCB走线宽度计算器
Calculate the minimum sampling rate needed to faithfully capture a signal using the Nyquist-Shannon theorem.
PCB过孔电流计算器
Calculate the data bit rate for a digital signal from sampling rate, bit depth, and number of channels.
热阻计算器
Calculate the relationship between baud rate (symbol rate) and bit rate for digital communication links.
PCB走线宽度计算器
Calculate the minimum PCB trace width for a given current using IPC-2221 guidelines.
天线长度计算器
Estimate the current carrying capacity of a PCB via based on its dimensions and allowed temperature rise.
频率与波长转换计算器
Calculate junction temperature through a chain of thermal resistances from junction to ambient.
同轴电缆阻抗计算器
Calculate the maximum allowed heat sink thermal resistance to keep a component within temperature limits.
传输线计算器
Calculate the physical length of dipole and quarter-wave antennas for a given frequency.
射频功率dBm计算器
Convert between frequency and wavelength for electromagnetic waves in free space.
噪声系数计算器
Calculate the characteristic impedance of a coaxial cable from its dimensions and dielectric constant.
天线增益计算器
Calculate propagation delay and electrical length of a transmission line from physical length and velocity factor.
自由空间路径损耗计算器
Convert between watts and dBm for RF power measurements, and calculate voltage into a given impedance.
链路预算计算器
Calculate the cascaded noise figure of a receiver chain using the Friis formula.
级联噪声系数计算器
Calculate the gain of a parabolic dish antenna from its diameter and operating frequency using the standard aperture formula.
趋肤深度计算器
Calculate the signal attenuation over distance in free space using the Friis transmission equation.
射频阻抗匹配计算器
Calculate a radio link budget to determine whether a wireless link will close by summing gains and subtracting losses.
驻波比计算器
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.