@Super Twang, Sure super caps are usable, there are a few on these groups who do use them in place of a battery. Last time I personally looked though, cost was very prohibitive. For instance:
http://www.ebay.com/itm/like/262291173781?lpid=82&chn=ps&ul_noapp=true $16.50 + $5.50 shipping each ? How many farads do we need to keep the board up for 30-60 seconds ? But let's assume two of these in series( because 2.7v is not enough ). versus something like this: http://www.ebay.com/itm/Lipo-Battery-Replacement-battery-for-808-18-Car-Key-Camera-Mini-DVR-60-minutes-/251600381055?hash=item3a948d247f:g:vu4AAOSwRLZT1MJd Anyway, I did not look too long, but lower capacity super caps did not sem to drop in price much. 120 farad caps seemed to be pretty close in price too. So, for a one off solution maybe not too much of a big deal, but for many, many systems. That cost is going to be far too high. On Thu, May 19, 2016 at 8:33 AM, Super Twang <[email protected]> wrote: > @Lachlan > Thanks for the info Lachlan. > > Re: Supercap reliability… > My basic understanding is that if you design with supercaps for a > “Everyday” (ie not too hardcore) indoor use case, and keep them within some > pretty obtainable operating conditions they effectively last forever. > Obviously there’s some ambiguity (“everyday” “pretty obtainable”, > “effectively”) in the prior assertion, but... > > My particular use case — indoor temps but in a wall, 5v power — might see > a temp range of 15° - 35°C max I’d guess. The 70°C - 105°C you’re talking > about would have to be a pretty harsh/industrial environment, no? > > Does anyone (who has done it, or knows how) have a sense of how > straightforward it is to achieve a supercap-based system design that keeps > the components in a range that’d keep them healthy for “Effectively > forever?” ie 20k+ cycles? (better than bats) 100k+? (effectively forever) > Or, do the requirements we’re looking at for a basic, indoor, power system > really push the supercaps into the “Quickly-used-up” zone? > > Best, > ST > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/F2A9E16C-3FED-44BD-AE07-F928C1477305%40gmail.com > . > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORrevWnDi-%2BAYvOt%3D00ws4QeuXyAQu5ejFE7ywqUY%3DYJ9Q%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
