I need a cct to turn off up to 10 LEDS after 4-6 hrs but I need to do it from a supply that could range from 5v down to 3.5v. The dear old 555 doesn't seem able and someone recommended a ZN1034 but I cannot find anything about it that's current.
A question. Does this chip need an external clock? If so it would make it phisically too big. The time accuracy doesn't have to be 100% accurate. + or- 5 mins is fine.
This IC contains an internal oscillator (need external R(poti) and C) and a programmable divider. I've tryed to find my old design, but no luck...)
In my design (the big advantage of IC) i can adjust the long time in few minutes: i put a jumper the low divider position, set the the time with poti, and thereafter put the jumper to high divider position.