Description: Using Hall sensors 3020T, according to Hall-effect principle, the motor shaft of a permanent magnet placed on the edge, do not put a shaft near the 3020T, when the shaft rotates by magnet effect, HUO Di Seoul device output pulse signal, sent to microcontroller interrupt pin, speed count plus 1, the microcontroller internally generated timing 5s to calculate the speed of 1 minute, sent to the display unit,
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电机转速测量.doc
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