What sensor to use? - Chief Delphi

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What sensor to use?

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#13

06-02-2012, 00:45

Alan Anderson Alan Anderson is offline

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Re: What sensor to use?

Quote:

Originally Posted by carrillo694

I hooked the sensor up to a 'scope today and observed a sinusoidal waveform when an object was present.

I'm guessing you were looking at the black output wire of a QS18VN part, and that you didn't have a pullup resistor connected to it. That output will be pulled to ground when no object is present, and it will float when an object is detected. You were likely seeing ambient 60 Hz noise being picked up by the wire.

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