RS-485 & CAN Bus Trunk-and-Drop Stub Length, Slew-Rate & Star-Topology Reflection Checker

Deterministic Lumped-vs-distributed stub criterion L_stub_max = (t_rise * c * VF) / 10 + loaded trunk impedance Z_loaded = Z_0 / sqrt(1 + N_stubs * C_stub / (L_trunk * C_line)) engine (.json, .csv, .pdf) built for Texas Instruments, Analog Devices, CiA 303-1, Phoenix Contact — zero-upload ephemeral Wasm RAM execution.

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