PIC power backup with "super capacitor"

[sayzer]

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Schematic:
http://www.qsl.net/zl1bpu/MICRO/CLOCK/CLOCK2.GIF
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Luciano,

9V battery in that schematic is indeed a good idea.

Thanks.

[flotulopex]

Well,

So many ideas..... :-)

I think, I'm going to make it the simple way first.

I found a super cap on an old PC motherboard so give me a few hours and I'll come back with some news.

Thanks to everybody for all your information. Really Great ;-)

[skimask]

Well,

So many ideas..... :-)

I think, I'm going to make it the simple way first.

I found a super cap on an old PC motherboard so give me a few hours and I'll come back with some news.

Thanks to everybody for all your information. Really Great ;-)

By the time you get done messing with a super-cap, you might find (as I did) that a diode-protected lithium coin cell might do exactly what you wanted the super-cap to do, easier and possibly cheaper (with an occassional replacement). I just wish I could find NiMH coin cells in similar size to the lithium coin cells...for cheap anyways...