Components

Ideal voltage source. Modelled as V-source in SPICE.

Linear resistor. Appears as R element in netlist.

Ideal capacitor. DC open-circuit; charges in transient analysis.

Modelled as a diode with a configurable forward voltage (Vf). Glows when current exceeds threshold.

Normally-open switch. Closed state is a short (0.001Ω); open is a break.

Three-terminal variable resistor. SIG pin outputs a fraction of total resistance set by the slider value.

Momentary switch. Same SPICE model as switch; toggles on click.

Passive piezo buzzer. Simulated as a resistive load; activation threshold shown in inspector.

1N4007 rectifier. Standard diode model with ~0.7V forward drop.

Energy storage in magnetic field

Bipolar junction transistor (NPN/PNP)

Operational amplifier (5-pin)

Voltage regulation diode

Sinusoidal AC voltage source

Ideal DC current source

Magnetically coupled inductors

Field-effect transistor (N/P channel)

Linear voltage regulator (LM78xx)

Temperature-sensitive resistor (NTC)

Light-dependent resistor (photoresistor)

Toggleable HIGH (1) / LOW (0) source. Drives the Boolean propagation engine.

Reads a Boolean signal and displays HIGH/LOW state with a colour indicator.

Output = A AND B. HIGH only when all inputs are HIGH.

Output = A OR B. HIGH when any input is HIGH.

Output = NOT A. Inverts a single input.

Output = A XOR B. HIGH when inputs differ.

Output = NOT (A AND B). AND with inverted output.

Output = NOT (A OR B). OR with inverted output.

Periodic square wave oscillator

Rising-edge triggered D flip-flop

Set-Reset latch with Q and Q̄ outputs

Rising-edge triggered JK flip-flop

Toggle flip-flop — toggles Q on rising clock edge when T is HIGH

4-bit binary counter, increments on rising clock edge

BCD to 7-segment display decoder

4-to-1 multiplexer — routes one of 4 inputs to output

1-to-4 demultiplexer — routes input to one of 4 outputs

2-to-4 binary decoder — activates one output per input combination