Electrical Circuit Diagram with Four Nodes and One Active Node #1222508 (License: Personal Use)

This diagram depicts a square-shaped electrical or logical network with four circular nodes at each corner. Three nodes are uncolored (white), while the bottom-left node is filled yellow, signifying activation, selection, or a fault condition. Short diagonal slashes on the connecting lines suggest open circuits, switches, or broken connections, implying conditional behavior in the system.

Commonly used in educational materials for teaching circuit theory, digital logic, or graph-based problem solving; also appears in technical documentation for fault tree analysis, sensor networks, or state machine diagrams where one node is emphasized as primary or active.