Gear tooth sensor vs. Optical Encoders

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Gear tooth sensor vs. Optical Encoders

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14-01-2006, 14:31

Don Reid

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Re: Gear tooth sensor vs. Optical Encoders

Quote:

Originally Posted by Avarik

Also, can the gear tooth sensors sense the direction of the spin, or just velocity?

According to the datasheet, this sensor outputs a 45 us pulse for one direction and a 90 us pulse for the other. I think you can detect this difference with the uP.

If you only want to know the speed of rotation though, just the number of pulses in a fixed period of time is enough. A simplified version of the encoder code could count pulses (in an interrupt function) without worrying about the other input.

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