I'm building a project which has a PIC16F877. It will store data averaging. I would like to have a battery back up so the data isn't lost duing a power outage.
The unit is powered by a 12v wall wart and stepped down by 78L05's for circuit power. Is there a battery backup system that will switch fast enough so the memory in the PIC won't be lost? I also was wondering if I should/could use a rechargable battery and trickle charge it to keep it at full charge?
The unit is powered by a 12v wall wart and stepped down by 78L05's for circuit power. Is there a battery backup system that will switch fast enough so the memory in the PIC won't be lost? I also was wondering if I should/could use a rechargable battery and trickle charge it to keep it at full charge?