Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Current Amperes (A)

Required number input.

Capacitance Farads (F)

Required number input.

Voltage Swing Volts (V)

Required number input.

Full-cycle frequency for symmetric constant-current charging and discharging across a voltage swing ΔV. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Frequency Hz (Hz)

The resulting frequency hz returned as a number.

• Compact electronics formulas omit some combination of tolerances, temperature drift, bandwidth, loading, parasitics, noise spectrum, nonlinearity, clipping, calibration, layout, and device-specific limits. Typical datasheet values are not guaranteed limits.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Schmitt Oscillator Frequency

  Frequency of a symmetric inverting RC Schmitt oscillator with switching thresholds at ±β times saturation voltage.

• Charge Current C-Rate

  Compute a safe constant-current charge rate for a battery from its capacity and a C-rate multiple.

• Charging Time Hours

  Estimate the hours needed to fully charge a battery at a constant current, including a documented 1.2 inefficiency factor that accounts for taper and losses.