Electronics Lab

Simulate circuits, diodes, transistors and op-amps. Plot V-I curves, load lines and Bode plots, with a live oscilloscope.

About the Electronics Lab

The Electronics Lab is a bench you can carry in a browser tab. It covers the analogue electronics taught in the first two years of an electrical or electronics engineering degree: resistor networks, diodes, transistors and operational amplifiers.

Instead of solving each circuit on paper and hoping, you can change a resistor and watch the currents, the load line or the Bode plot move. Rectifiers and clippers run on a live oscilloscope, the Zener regulator shows the output holding steady as the load changes, and the BJT experiments show how temperature drags the operating point and how a good bias design fights back.

It suits diploma and engineering students preparing for lab sessions or exams, and hobbyists who want to understand a circuit before building it. There are no parts to buy and nothing to burn out.

Experiments in this lab

  1. Resistor networks: Series and parallel resistors, currents and voltage drops.
  2. Thevenin and Norton: Replace a whole network with one source and one resistor.
  3. Diode V-I curve: Forward bias, reverse bias and the load line.
  4. Wave shaping: Rectifiers, clippers and clampers on a live oscilloscope.
  5. Zener regulator: Hold the output voltage steady as the load changes.
  6. BJT biasing: Place the operating point on the load line.
  7. Thermal stability: How temperature drifts the operating point, and how bias design fights it.
  8. Frequency response: Gain and phase across frequency on a Bode plot.
  9. Inverting and non-inverting: Set the gain of an op-amp amplifier with two resistors.
  10. Math operations: Summers, integrators and differentiators.
  11. Active filters: Low-pass, high-pass and band-pass responses.