Open net
▲ warningconnectivity/open-net
What it looks like
U2.vin (power) isn't wired to anything yet.
What it checks
A terminal that connects to nothing — a power pin with no rail, an output driving nobody.
Why it matters
Sometimes it's just unfinished work. But an unwired power pin means a block silently does nothing, and a floating input picks up whatever the nearest electric field suggests — the classic source of 'it randomly toggles'.
How to fix it
Wire it, or remove the block if it isn't meant to be there yet. For deliberately-unused pins, leaving them open is often fine — the warning is the design's to-do list.
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