Electronics > Beginners

Potting a battery?

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Lee697:
I only have a fairly small space to use for this, hence the small battery, I've got several packs of various lithium AA/AAA's/9V around, I'd certainly use those if I could. The cost of the battery doesn't worry me, at 1200mAh it should deliver through to its expiry, if I can keep it all dry.... :) I haven't discounted trying a CR2032 or two instead, although capacity would take a hit....

I'll take a look at the the regulators you've linked. Cheers.

The reason I've chosen the ATtiny85V is I have some here, and find them easy to program, and they're small enough. I only really need the one output, but may add a little battery state LED as well yet.



--- Quote from: mariush on September 10, 2019, 01:29:32 pm ---Have you considered using AA batteries ?

-----
There are microcontrollers that run from battery but if you need 3v, why not just use a very efficient voltage doubler IC... would be over 95% efficient at a few mA of current.
.....

There's also very efficient switching regulators.. here's ex

.....


--- End quote ---

mzzj:

--- Quote from: mariush on September 10, 2019, 01:29:32 pm ---Have you considered using AA batteries ?

You can get lithium based AA batteries like Energizer Ultimate Lithium that have something like 3500mAh at around 1.4v..1.7v ... see : http://data.energizer.com/pdfs/l91.pdf
They're not cheap at around 2-3$ each but it's way cheaper than your 14$ battery.


--- End quote ---
3.6v primary lithiums can be also found cheaper than 14$
IE:
https://www.digikey.com/product-detail/en/tadiran-batteries/TL-5101-P/439-1003-ND/512505
https://www.digikey.com/product-detail/en/panasonic-bsg/BR-1-2AAE2PN/P630-ND/1118808

Lee697:

--- Quote from: mzzj on September 10, 2019, 09:23:05 pm ---
3.6v primary lithiums can be also found cheaper than 14$
...

--- End quote ---

I'm sure they can... by the time I factor in USD/AUD conversion and shipping, or buying a bunch of stuff I don't really need right now to get free shipping (I seem to do that a lot!), it becomes a bloody expensive saving.... :D

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