One slightly sad consequence, then, (besides the fact I've expended valuable bench time on a impossibility), would be that, now that I think about use of a PV to detect FAST stuff, is that a person could have used a fast-responding PV cell to have large area for detecting incoming faint light signals, vs. a small diameter cds or pin diode detector. I'd suppose a lens and reflector would get you that increase, for really faint incoming signals.
Oh well, but at least THAT item is explained.
Knowledge gained, at little cost, THANKS EEVBLOG people!
That explains that a hard connection, with wires can bring in the lower or zero signal levels which then cause response (go to nighttime mode). Electrically, the little controller might or might not track that fast signal.
But, clearly the response is as a non-inverting follower, less of interest than an inverting logic.
Going with that, can't simply use, say, a 2n2222 NPN BJtransistor, unless design a higher turn-on threshold, higher than the usual 0.7 base to emitter.
Tempting to put an inverter in the path, but I fear that wouldn't be enough, if you've viewed the diagram, a couple posts back, one state is 1.5 VDC from battery, and other is 'vibrating'.
Had a dream, a while back, that the human brain stores things in that format; either vibrating or silent, as coding for the two states.
FCB ? That is, Frequency Encoded Binary...
Better is; VCB. or 'vibrationally coded binary'
Not necessarily so strange, as you could build up a system using those rules, assuming proper resources.
Code1 + 0 =. Code1,
Code1 + Code1 = Code0 + carry
That part is easy.