feat: reduce comparison voltage for 4.5V to 0.6V
feat: reduce comparison voltage for 4.5V to 0.6V

we have added an 1k resistor before the voltage divider.
Reaching 0.8V wouldn't be possible if we wanted 3.8V as
minimum supply voltage.  (poti has only 220Ω)

close2/nebenuhr,close2/nebenuhr