cause i use the comparator for catch the moment when the battery goes under the 3 volts (this happened only after many months cause the rtc absorbe only a few uA) but the pic is...
If you use this one instead of BC327, then you may use 100K resistor instead of 10K.
Thus, current drawing gets super low.
But, first, just test the idea...
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Re: with the pic16f628a off, a voltage on an1 comes out from main voltage pin, why?
ok, since you have two power sources, your options are:
Ioannis - 14th June 2019, 13:531. The circuits above with transistors etc contrlled by the PIC itself.
2. None of the above, just count a year or two and ask the user...