I was wondering if anyone has any simple solutions for battery backup. I'm
using a 16C74 that is displaying info. on an alphanumeric led display.
There are times when I'll have to change the main battery , or turn off the
main battery for one or two days. My problem is I don't want to lose the
data in the PIC .  What would people reccomend in this case. Should I add
eeprom? Should I turn off the display  put the pic to sleep and run off a
cap or small battery? What is the simplest way to detect the main battery
being removed from the system and still have time to save important data?
If anyone has any thoughts on this issue I'd love to hear them. Thanks
--
Jim Ruxton              (416)927-7679
Cinematronics
Toronto Canada
cinetron@passport.ca