5V DC 40mm × 10mm Ball Bearing Cooling Fan – 7.7 CFM Airflow (Model CFA054010HB)

Description

Locked Rotor Alarm Signal Output (yellow wire lead): Under normal conditions a locked rotor alarm signal outputs a constant signal frequency… if the fan stops spinning or “locks”, it then outputs a “LOW” condition signal. If the fan starts spinning again, the “LOW” condition signal will go away.

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