Auto-Generated Diagrams

SpiceBook can generate a schematic diagram from any SPICE cell. Click the Schematic button in the cell toolbar, and the backend parses the netlist into a circuit diagram rendered as an inline SVG.

How It Works

The schematic generator:

1. Parses the netlist to identify components (resistors, capacitors, inductors, voltage sources, current sources) and their node connections
2. Determines layout by walking the circuit graph and positioning components to minimize wire crossings
3. Renders SVG with standard electrical engineering symbols — IEEE zigzag for resistors, parallel plates for capacitors, coil for inductors, ± symbols for sources
4. Labels components with their reference designator (R1, C1, V1) and value

The result is a clean, readable diagram that matches what you’d draw by hand.

Supported Components

Component	Netlist Prefix	Symbol
Resistor	R	IEEE zigzag (with optional color bands)
Capacitor	C	Parallel plates
Inductor	L	Coil
Voltage source	V	Circle with ±
Current source	I	Circle with arrow
Ground	node 0	Standard ground symbol

Component Map

The schematic endpoint returns a component_map alongside the SVG, listing each component and its type:

{
  "svg": "<svg ...>...</svg>",
  "success": true,
  "component_map": {
    "R1": "resistor",
    "V1": "voltage_source",
    "C1": "capacitor"
  }
}

This is useful for programmatic tools that need to know what’s in the circuit without parsing the SVG.

API Access

Generate schematics programmatically:

curl -X POST https://spicebook.warehack.ing/api/notebooks/{id}/cells/{cell_id}/schematic

The cell must be type spice. No request body is needed — the cell’s source netlist is used directly. See the Waveforms & Schematics API reference for the full response format.

Note

Schematic generation works for both ngspice and LTspice netlists. The generator parses the netlist text directly rather than relying on engine-specific features, so it works identically with either engine.