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Electronics Tools
42 tools in this collection. Choose a task below or search the complete FeuTex toolkit.
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555 Astable Timing
Estimate high time, low time, frequency and duty cycle for a standard astable.
Open tool →ElectronicsAnalog Integrator Ramp
Estimate the output ramp from a constant input pulse.
Open tool →ElectronicsBoost Converter CCM Ripple
Evaluate ideal duty and inductor currents for a boost power stage.
Open tool →ElectronicsBuck Converter CCM Ripple
Evaluate duty cycle, inductor ripple and peak current under ideal CCM.
Open tool →ElectricalCapacitive Reactance Calculator
Calculate capacitive reactance with labeled inputs, explicit units and the formula Xc = 1/(2πfC).
Open tool →ElectronicsCapacitor Charge Sharing
Estimate final voltage and energy dissipated when charged capacitors are connected.
Open tool →ElectronicsCapacitor Ripple Heating
Separate ripple voltage and ESR dissipation for sinusoidal ripple current.
Open tool →ElectricalCapacitor Stored Energy Calculator
Calculate capacitor stored energy with labeled inputs, explicit units and the formula E = ½CV².
Open tool →ElectronicsClock Drift over an Interval
Estimate worst-sign relative timestamp drift for two independent frequency bounds.
Open tool →ElectronicsDifference Amplifier Resistor Mismatch
Expose unwanted common-mode gain caused by unmatched resistor ratios.
Open tool →ElectricalElectricity Energy Cost Calculator
Calculate electricity energy cost with labeled inputs, explicit units and the formula cost = kW × hours × price/kWh.
Open tool →ElectronicsFinite Open-Loop Gain Error
Quantify closed-loop gain error from finite DC loop gain.
Open tool →ElectricalIdeal Battery Runtime Calculator
Calculate ideal battery runtime with labeled inputs, explicit units and the formula t = usable Ah / current.
Open tool →ElectricalInductive Reactance Calculator
Calculate inductive reactance with labeled inputs, explicit units and the formula XL = 2πfL.
Open tool →ElectricalInductor Stored Energy Calculator
Calculate inductor stored energy with labeled inputs, explicit units and the formula E = ½LI².
Open tool →ElectronicsInverting Amplifier Stage
Estimate signal gain, noise gain and dominant-pole bandwidth.
Open tool →ElectronicsInverting Buck-Boost Stress
Estimate ideal duty, switch blocking voltage and average inductor current.
Open tool →ElectronicsI²C Pull-Up Resistance Window
Compare rise-time and sink-current limits for a bus pull-up.
Open tool →ElectricalLC Resonant Frequency Calculator
Calculate lc resonant frequency with labeled inputs, explicit units and the formula f = 1/(2π√LC).
Open tool →ElectronicsLinear Regulator Thermal Budget
Estimate dissipation and junction temperature from a linear-regulator operating point.
Open tool →ElectronicsMOSFET Gate-Drive Charge Budget
Estimate average gate-drive load and charge-delivery time.
Open tool →ElectronicsMOSFET Hard-Switching Loss Budget
Separate approximate conduction and switching overlap losses.
Open tool →ElectricalOhm’s Law Current Calculator
Calculate ohm’s law current with labeled inputs, explicit units and the formula I = V/R.
Open tool →ElectronicsOp-Amp Bias Resistor Balance
Compute the balancing resistor and remaining offset-current error.
Open tool →ElectronicsParallel Thermal Paths
Combine two heat-flow paths and estimate steady-state temperature rise.
Open tool →ElectronicsPWM Frequency and Resolution
Relate an edge-aligned timer period to PWM duty steps.
Open tool →ElectricalRC Filter Cutoff Frequency Calculator
Calculate rc filter cutoff frequency with labeled inputs, explicit units and the formula f = 1/(2πRC).
Open tool →ElectronicsRC Threshold Crossing
Calculate charging time to a specified comparator threshold.
Open tool →ElectricalRC Time Constant Calculator
Calculate rc time constant with labeled inputs, explicit units and the formula τ = RC.
Open tool →ElectricalResistive Electrical Power Calculator
Calculate resistive electrical power with labeled inputs, explicit units and the formula P = I²R.
Open tool →ElectronicsRL Step Current
Evaluate inductor current and magnetic settling after a voltage step.
Open tool →ElectronicsSeries RLC Damping Regime
Calculate damping ratio and critical resistance of a series RLC transient.
Open tool →ElectronicsSeries RLC Impedance at Frequency
Compute impedance magnitude, phase and current for a series RLC load.
Open tool →ElectronicsSine-Wave Slew Headroom
Compare sine-wave slope against the supplied slew-rate limit.
Open tool →ElectronicsThree-Op-Amp Instrumentation Gain
Calculate the gain of the classic symmetric instrumentation topology.
Open tool →ElectronicsTimer Divider Quantization
Find the nearest integer divider and resulting timing error.
Open tool →ElectronicsTransimpedance DC Error Budget
Estimate sensor-current output and offset/bias contributions.
Open tool →ElectricalTwo Resistors in Parallel Calculator
Calculate two resistors in parallel with labeled inputs, explicit units and the formula R = R₁R₂/(R₁+R₂).
Open tool →ElectronicsTwo-Input Summing Amplifier
Combine two analog channels with distinct resistor weights.
Open tool →ElectronicsUART Framing Throughput
Estimate serial character timing and useful data rate for an asynchronous frame.
Open tool →ElectricalUnloaded Voltage Divider Calculator
Calculate unloaded voltage divider with labeled inputs, explicit units and the formula Vout = Vin R₂/(R₁+R₂).
Open tool →ElectronicsWheatstone Bridge Imbalance
Calculate differential bridge voltage and source loading.
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