3D SPR Visualizer — PDN Toy Tools

Source Instance

Target Domain

Speed: 1.0x

🎥 Follow Path Camera

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How SPR Works

Shortest Path Resistance answers: "What is the easiest route for current to flow from this circuit to a power supply?"

Select an instance, pick a domain with bumps, then click "Find SPR". The tool will find paths to every bump simultaneously and show you which one wins.

Metal Stack (bottom → top)

Instances (bottom)

M1 Horizontal

M2 Vertical

M3 Horizontal

M4 Vertical

Domain A bumps (top)

Domain B bumps (top)

Domain C bumps (top)

Domain D bumps (top)

Drag to rotate · Scroll to zoom · Click cubes/bumps

Initializing 3D view…