Quote:
Originally Posted by jee7s
If you can describe a bit more of that scope flicker, it may lend an explanation.
Here's a possibility: If you get rapid flicker when the object is present, then it's probably a supply issue where the system can operate with little load (i.e. it's not pulling current through your 1K pullup). Once it has to switch, however, the current draw causes a power dropout. This could be either the internal circuitry going undervoltage or your supply line going undervoltage. Once the unit loses power, the supply returns to the nominal condition, it turns on, and it tries to signal again, repeating the power loss. This would explain a fast flicker with an object constantly presented to it.
As your teammate said, verify your supply voltages and report back.
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Sorry if I wasn't clear on that point; by "flickering" I meant to say that the sensor appropriately responds to the presence of something within its field of vision by turning on and off. The latter issue has since been rectified (it was inducing an output overload signal, which is how I noticed it).
Quote:
Originally Posted by jee7s
As a cautionary note, I'm not sure if the DSC is 12V tolerant. Those 5V pullups on the DSC PCB would do the job you want.
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The RightSight sensors last year were wired in a similar fashion; their power was supplied by the PDB, and their outputs directly into Digital I/O, so I'm inclined to believe that this isn't necessarily the case, though I could be wrong. (In that event, would I have to wire in voltage converters or something similar? - that seems excessively complex to me).
What exactly do you mean by the 5V pullups on the DSC
PCB? emphasis mine.