Re: [Gumstix-users] Monitoring battery voltage from lipo's

[alxx <al...@al...>]

> Alex would you mind posting any information about how you made the LVC
> you use in your project? I have been wondering about those as well and
> like that yours has to be manually reset. If its a hassle no worries.
>
> Using the ADC on the summit seems difficult from what I read. But does
> sound like the cleanest solution. These are the times I wish I was an
> electrical engineer so I actually knew what I needed and how to make
> it :P
>
> And again I appreciate the examples and help
>

The circuit I'm using isn't going to be much use for you as I'm using
sealed lead acid batteries(gel cells) 6V 12Ah/24Ah .

Some of the newer regulators (switch mode) have low voltage cut outs builtin.

See
Low-battery voltage cutoff consumes just 1 mA
http://www.edn.com/archives/1998/091198/19di.htm
http://www.edn.com/archives/1998/091198/pdfs/17d22531.pdf

Just pick the version of the MN1380 that gives the voltage level you want.
solarbotics sells them(in the US) as does small parts and bearings in
Australia
http://www.solarbotics.com/products/1381/

For another
similar circuit to the bottom circuit on this page
except using it to control the output(power) via a solid state relay.
http://www.siliconchip.com.au/cms/A_104378/article.html

Alex