Stan that's a great suggestion, but one problem. As I said the TT is complex. Under the table is a set of electronics/relays to activate sound--(currently also trying to learn how to use DFPlayer module to replace that stuff). Power (~5.4VDC) to that audio setup and to the TT (via the slip ring) is supplied from a voltage regulator that receives 12VDC. I could add a 2nd voltage regulator to supply 5V to the detection/override functions. I guess it's a matter of what is most convenient and effective. Also, it doesn't seem reasonable to keep those components always powered even if not being used--so maybe that's best approach.
By the way I did keep increasing resistance values and am using 15K.
By the way, if I haven't been too much of a pest, I would really like to know why current level (if that's what is the controlling agent) through an IR sensor affects its' sensitivity (or at least that's what I observed). Maybe I need to check some spec.s.
Thanks again for all of the help & suggestions.
Ken
