Jelc.Simulator: Circuits

Electronic circuit simulator in 10 languages, made for electronics students and
teachers — from technical school to college. Build your circuit with your
finger, wire it up and simulate instantly. Works OFFLINE: once installed it
needs no internet.
▶ THE SIMULATION COMES ALIVE
It is not a static drawing: CURRENT flows through the wires as particles, the
lamp LIGHTS UP according to power, the motor SPINS according to current and the buzzer SOUNDS while it is powered. You see what happens, not just numbers.
▶ REAL ANALYSIS
• DC: operating point, voltages and currents node by node.
• Transient: built-in oscilloscope with cursors, measurements (Vpp, RMS,
frequency) and adaptive step for precise traces.
• Bode (AC): frequency response, gain and phase.
• DC sweep, and a live results panel component by component.
▶ POWER ELECTRONICS (what other simulators leave out)
• Thyristor (SCR), TRIAC and DIAC with phase control — build the real wall
DIMMER and watch it chop the waveform.
• IGBT for switching and choppers.
• Optocoupler and transformer for isolation.
• Relay with real physics: inductive coil, hysteresis and flyback spike.
The industrial-electronics lab the technical curriculum needs.

▶ 57 COMPONENTS
Resistors, capacitors (including polarized electrolytics), inductors, diodes,
LED, Zener, Schottky, lamp, heater, fuse, potentiometer, photoresistor, DC
motor, relay, buzzer, 7-segment display, LCD, DC / sine / pulse (PWM) /triangle / sawtooth / noise sources, BJT and MOSFET transistors, operational amplifier, voltage regulator, transformer, the NE555 timer, logic gates and flip-flops for digital circuits. Edit any value with engineering notation (4.7k, 1µ, 4k7).
▶ 52 GUIDED EXAMPLES
Dividers, rectifiers, Wheatstone bridge, filters and resonance (Bode), a
mains-to-12 V power supply, op-amp amplifiers, 555 oscillator and monostable, a relay switching a lamp, a DIAC dimmer, a three-phase line, a logic latch, a light alarm and more — each with its animated schematic and its explanation.
▶ FORMULAS THAT DO THE MATH
24 calculators built into the theory sheets: Ohm's law, series and parallel,
dividers, RC and RL time constants, reactance, cutoff frequency, resonance, the LED resistor, 555 astable and monostable and more. Leave the unknown blank and it solves it, or load the values straight from the circuit you have on screen.
It also suggests the nearest real E24/E12 resistor and shows the error.
▶ MADE FOR LEARNING
• 10 languages: English, Spanish, Portuguese, German, French, Italian, Polish, Russian, Turkish and Hindi.
• Touch editor with floating buttons: place a part, wire pin to pin with two
taps, lock the circuit to drag a whole connected block.
• Warnings that teach: it tells you when an electrolytic is backwards or when a part is running far over its limit — an LED with no resistor lights up in the
simulator and burns out on the bench.
• Settings screen: light or dark theme, text size, values on the grid and a
step-by-step tutorial.
• Save your circuits, export the schematic or the oscilloscope trace to PNG and share them from the app.
▶ LIGHT AND FAST
Runs even on school netbooks and Chromebooks. Its own simulation engine, no gimmicks: it solves with the same methods as a professional simulator.
Free, with a banner ad at the bottom. A single optional purchase removes the ads forever.

Ideal for analog and power-electronics classes: rectifiers, amplifiers, filters,
phase control with thyristors, timers and digital circuits — experiment without burning anything.