Circuit calculators
Each one computes the numbers AND shows the real circuit they belong to — with a one-click path to designing it for real.
Series resistor, nearest standard value, actual current and power.
Output voltage, output impedance, standing current — plus reverse mode.
The two caps from rated CL and board strays.
Resistance, divider ratio, and ADC counts across temperature.
Non-inverting and inverting gain; reverse mode picks standard resistors.
Kv to torque, rewind turns scaling, wye/delta, cogging steps, winding wire math.
How current splits between parallel resistors — the voltage divider's mirror.
Resistor triangle to star and back — bridges and three-phase networks.
Resonant frequency, XL/XC at any frequency, series/parallel L & C math.
Real/reactive/apparent power, single & three phase, PF correction sizing.
Synchronous speed, slip, rotor frequency, shaft torque, efficiency.
Butterworth order 2–8 as cascaded Sallen-Key stages — standard parts, achieved response.
Any number in parallel + series, and what to parallel with what you have.
Frequency, duty cycle, HIGH/LOW times from Ra, Rb, and C.
Cutoff from R and C; reverse picks the resistor for your target.
Solve V, I, or R — with the wattage number that decides part survival.