> With your OPB702 reflective sensor, it probably has a molded
> lens with a definite focal point where it will work best.You might
> try adding additional illumination, at least temporarily, to figure out
> where that focal point is

The datasheet says 0.15", which is what I set the guide to, and it does
seem to be its sweet spot. That particular opto might work if a Schmitt
Trigger or PIC smarts was added, as it's not too definite on edges or
thin lines. Think I'm veering towards through-paper though

Joe
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