A set of closed-form circuit calculators in the browser. Everything is computed client-side; there is no backend.
| Calculator | What it computes |
|---|---|
| BJT voltage-divider bias | Thevenin voltage and resistance of the base divider, base and collector current, Q-point |
| Op-amp | Gain and transfer curve for inverting and non-inverting amplifiers; Bode magnitude for the integrator and differentiator |
| RC transient | Charge and discharge curves and the time constant |
| RC filter | Low-pass or high-pass cutoff frequency, and magnitude at a test frequency, with a Bode plot |
| Diode / regulator | Series resistor and its power for an LED; series-resistor limit for a Zener regulator |
| Voltage divider | Output voltage and divider current |
Built with Next.js 16, React 19, Tailwind CSS 4 and Recharts.
npm install
npm run devThen open http://localhost:3000.