Hi All
I have a setup with 8051 micro controller and I want to provide a battery backup so that when power fails the micro continues to work. Only the micro needs to work and other peripherals need not.
What will be the minimum circuitry and what is the minimum voltage required to keep this micro up?
-- Thanks for your time and attention ClueLess
Two diodes, for isolation.
That depends on which model of micro - check the data sheet for a "power down" or "sleep" mode or the like; the data sheet knows all. ;-)
Good Luck! Rich
"model"
The spelling police are going to get you!!!
Say, how do you connect them? Is one not enough?
-- Thanks for your time and attention ClueLess
What? How would _you_ spell "model"?
Thanks, Rich
That depends on if you're worried about proper current-sharing; this isn't my forte, so hopefully someone can give a more comprehensive answer - OP asked for the "simplest", and that came to my simple mind. ;-)
Thanks, Rich
+--[DIODE>]--+--[
Rich, that was another worker in this office screwing with my computer when I was making a pit stop. I'm now convinced he is lesdexic or just stupid!
;-)
PS. I'll try to remember to lock the keyboard when I'm out of sight so that won't happen again.
Varies with manufacturer and specific model. Certainly as low as 2.7V IIRC with some Philips (NXP) parts.
Graham
Much thanks for the response. That goes to the others too.
-- Thanks for your time and attention ClueLess
OK, no harm, no foul. :-)
Cheers! Rich
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