Arduino Tachometer with Magnetic Hall Sensor

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Arduino tachometer using an inexpensive hall sensor and neodymium magnet. This method allows the user to approximate the RPM of a motor with a lightweight magnet and non-contact hall sensor.

#arduino #sensor #magnet #engineer
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That weight imbalance has to be brutal on the fan's bearings. Maybe double up with a magnet on each side of the hub, then cut the detected RPM in half.

cecilkorik