Hi to all ,
I am going to implement a system that detects the AC power removal from my PIC18F452 board in order to save data before the Pic stops to operate definitively. I am thinking to use a LVD ( low voltage detect ) input of the PIC connected to a resistor voltage divider connected at the full wave rectifier of the power supply. Some sort of clamping will be used to avoid input voltage greather than 5 Vdc.
Any suggestion ?
Thanks
Ambrogio
IW2FVO
North Italy