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Motor Shaft Magnetic Encoder
The encoder of measures the rotation of a magnetic disk at the motor shaft. The Encoders use custom made 8-pole magnets and 2 hall-effect sensors to provide 2 square waves, 90 degree out of phase with a total of 16 state changes per motor revolution (8 per each encoder output)
The encoder is powered by a voltage between 3-24 V, its maximum current is 10 mA. The two outputs A and B provide a square signal with voltage between 0 and Vcc with a phase shift of approximately 90° (see oscilloscope output below). Each rising and falling edge of both encoders indicate an encoder count. The frequency of these edges indicates the rotation speed (8 square waves per each encoder output, total of 16) and the order of the transitions indicates the direction.
The rubber hubs will press fit over most small motor and drive shafts used in low power gearboxes.
