Calculator catalog
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Found 53 calculators
LED resistor calculator
Calculates resistance and resistor power for an LED current limiting resistor.
LED series resistor
Calculates a current limiting resistor for multiple LEDs connected in series.
LED resistor power
Calculates power dissipated in an LED current limiting resistor.
Zener resistor
Calculates the series resistor for a simple Zener diode regulator.
BJT base resistor
Calculates a base resistor for simplified BJT transistor drive.
Bridge rectifier average output
Estimates average voltage of an unloaded full-wave waveform without a smoothing capacitor.
Rectifier smoothing capacitor
Calculates ripple for a selected capacitance or required capacitance for an allowed ripple.
Diode conduction power loss
Calculates diode power loss from constant forward voltage and average current or conduction current with duty cycle.
BJT voltage divider bias
Calculates a simplified BJT operating point from base divider, emitter resistor and collector resistor.
MOSFET external gate resistor
Estimates required external gate resistance from gate charge and switching time.
MOSFET conduction loss
Calculates conduction loss from RMS current, Rds(on) and duty cycle.
MOSFET switching loss
Estimates MOSFET dynamic losses from voltage, current, switching times, frequency and gate-drive power.
Semiconductor junction temperature
Calculates junction temperature from ambient or case temperature with known power loss and thermal resistance.
Inverting op-amp gain
Calculates voltage gain of an ideal inverting operational amplifier.
Non-inverting op-amp gain
Calculates voltage gain of an ideal non-inverting operational amplifier.
RC low-pass cutoff
Calculates cutoff frequency of a simple RC low-pass filter.
RC high-pass cutoff
Calculates cutoff frequency of a simple RC high-pass filter.
PWM average voltage
Calculates PWM average voltage for duty cycle in the 0..1 range.
ADC resolution
Calculates ADC voltage step from reference voltage and bit count.
ADC code from voltage
Calculates ideal ADC code from input voltage, reference voltage and bit count.
Resistor voltage divider
Calculates output voltage of an ideal two-resistor divider.
Loaded voltage divider
Calculates output voltage of a resistor divider with load resistance in parallel with the lower resistor.
Current divider for two resistors
Calculates branch currents in an ideal two-resistor current divider.
Op-amp inverting gain
Calculates gain and output voltage of an ideal inverting op-amp.
Op-amp non-inverting gain
Calculates gain and output voltage of an ideal non-inverting op-amp.
Three-input op-amp summing amplifier
Calculates output voltage of an ideal inverting summing amplifier with three input resistors.
Matched-ratio op-amp differential amplifier
Calculates differential amplifier output for matched resistor ratios.
Op-amp integrator for constant input
Calculates output change and final voltage of an ideal integrator for a constant input voltage.
Op-amp differentiator for linear ramp
Calculates ideal op-amp differentiator output for a constant input voltage slope.
Op-amp maximum frequency from slew rate
Estimates maximum sine frequency from slew rate and peak output voltage.
Op-amp closed-loop bandwidth
Estimates closed-loop bandwidth from gain-bandwidth product and gain magnitude.
Duty cycle from on-time
Calculates PWM duty cycle and frequency from on-time and period.
Resistor power dissipation
Calculates power dissipated in a resistor from voltage and resistance.
Basic RL time constant
Calculates the time constant of a simple RL circuit from inductance and resistance.
PCB trace resistance
Calculates resistance of a simple PCB trace from resistivity, length, width and copper thickness.
PCB trace width and current
Estimates required width or approximate current of a PCB trace with an older simplified empirical model.
Logic gate
Calculates the output of a NOT, AND, OR, NAND, NOR, XOR, or XNOR gate for boolean/0/1 values.
Truth table up to 3 inputs
Generates a truth table for the selected gate and 1-3 inputs without an expression parser.
First-order RC filter
Solves f_c = 1/(2*pi*R*C) for a simple first-order RC filter.
RC cutoff frequency
Calculates cutoff frequency of a simple RC filter.
RL cutoff frequency
Calculates cutoff frequency of a simple RL filter.
RL low-pass cutoff
Calculates cutoff frequency of a simple ideal RL low-pass filter.
LC resonant frequency
Calculates resonant frequency of an ideal LC circuit.
Preferred E-series resistor
Selects the nearest E12, E24, E48 or E96 resistor value.
Resistor color code
Decodes 4-, 5- and 6-band resistors.
Rectifier and ripple
Estimates rectifier voltage and ripple with a filter capacitor.
Power ratio and dB
Converts a positive power ratio and decibels.
Voltage ratio and dB
Converts voltage ratio to dB for equal impedances.
dBm and dBW power levels
Converts watts and dBm/dBW power levels.
dBm and dBW converter
Converts dBm and dBW power levels.
555 astable timer
Calculates ideal 555 astable oscillator parameters.
555 monostable timer
Calculates the pulse time of an ideal 555 monostable circuit.
Advanced PCB designer
Interactive stack-up, trace-segment and via-group designer with resistance, voltage drop, power loss and user-defined limits.