Undriven rail
▲ warningconnectivity/undriven-rail
What it looks like
+3V3 powers 4 loads but nothing drives it — connect a source, or mark it off-board.
What it checks
A net with loads attached but no declared source anywhere on it.
Why it matters
Four chips waiting on a rail nobody generates is a design that ships dead. The common real cause: the rail is supposed to arrive from off-board, but the connector pin was never declared, so the engine — like the bench — sees nothing.
How to fix it
Add the regulator or supply that makes the rail, or declare the connector pin where it enters the board (voltage and current), which both fixes the finding and lets every other check see the real source.
This check runs live while you wire
Findings name the exact net and pin, with the numbers behind the verdict. Free, in your browser, no account needed.
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