Sam Gorman

Work out how fast a capacitor loses voltage through a resistor. You can either find the time to reach a chosen voltage, or find the voltage after a set time. Find time to reach a voltage Find voltage after a time Starting capacitor voltage (V0) volts V Target voltage (Vt) volts, must be lower than … Read more

Enter a resistor value and a capacitor value to find the time constant. This helps you estimate how fast the capacitor charges or discharges. Resistance (R) required ohmkOhmMOhm Capacitance (C) required pFnFuFmFF Time constant: tau = R x C Advanced options (optional) v Step type Charging (rising) Discharging (falling) Charging level approaches the final value. … Read more

Enter two or more resistor values to find the single resistor value that would act the same in a parallel circuit. This is sometimes called the “equivalent resistance”. Resistor 1 (R1) required ohmkOhmMOhm Resistor 2 (R2) required ohmkOhmMOhm For two resistors: Req = (R1 x R2) / (R1 + R2) Advanced options (more resistors) v … Read more

Enter the input voltage and two resistors to find the output voltage in the middle. You can also add an optional load and resistor tolerance to see how the result may change. Input voltage (Vin) volts VmV Top resistor (R1) from Vin to the midpoint ohmkOhmMOhm Bottom resistor (R2) from the midpoint to ground ohmkOhmMOhm … Read more