Circuits I

Interactive circuit calculators in course order: Ohm’s law, voltage dividers, Thevenin/Norton, RC transients, RLC resonance and op-amp filters — with live simulation.

1. 1

   Ohm's Law

   Calculate current, power and energy using Ohm's Law. Instant V=IR calculator with AI-explained results. Free electrical engineering tool.…
2. 2

   Voltage Divider

   Calculate output voltage, current and power dissipation for a two-resistor voltage divider. Instant results. Free electrical engineering cal…
3. 3

   Thévenin / Norton Equivalent

   Calculate load current, voltage, power and maximum power transfer using Thévenin's theorem. Includes Norton equivalent current and power tra…
4. 4

   RC Time Constant

   Calculate RC circuit time constant, charge voltage at any time t, 50% and full-charge times, and low-pass filter cutoff frequency.…
5. 5

   RC/RL/RLC Circuit Transient Response

   Calculate step response of RC, RL and RLC circuits. Returns voltage/current at any time, time constant, natural frequency, damping ratio and…
6. 6

   Series RLC Circuit

   Calculate RLC circuit resonant frequency, impedance, Q-factor, bandwidth and phase angle for series circuits. Free circuit analysis calculat…
7. 7

   Op-Amp Active Filter Designer· Simulation

   Design Butterworth or Chebyshev active low-pass, high-pass or band-pass filters. Returns Bode plot (gain + phase), step response and Sallen-…
8. 8

   Wye–Delta Impedance Converter

   Convert between wye (Y) and delta (Δ) three-phase impedance networks. Essential for 3-phase circuit analysis, motor equivalent circuits and …