Hi, I am a newbie when it comes to PBP and PIC. I am having problem with setting up my PIC to monitor the battery voltage. I am running 12C671 on 4.5V and it is simply getting used to glow few LEDs in my college project
I would like to have more insight into using this wonderful feature of PIC to monitor low battery. I have seen a project for 12F635 but they have an inbuilt feature to detect the voltage and at predefined levels.

Is there any article on voltage checking while PIC is sleep for example article(s) showing the hardware setup, code insight etc. I want a starting point to take this further. Thanks