Favorite reverse bias protection for battery circuits [Design]

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From: Joerg on 23 Mar 2010 10:59

Michael A. Terrell wrote:
> Joerg wrote:
>> D Yuniskis wrote:
>>> Joerg wrote:
>>>>> I just want something for my bugout-bag that I can rely on
>>>>> *without* having to worry that some component (e.g., a
>>>>> battery *buried* inside the "emergency light") has died
>>>>> because it's been in storage for 10 years... I *think*
>>>>> this thing will work good as there are no "components"
>>>>> that I'd have to worry about crapping out (just the little
>>>>> DC "motor/generator" and a bunch of mechanical bits)
>>>>>
>>>>> What good are emergency devices if you can't rely on
>>>>> them in an emergency?? :>
>>>> That's what preventive maintenance is for :-)
>>> Bug out bag isn't something that sits in a prominent
>>> position in the house. I.e., you've got to go *looking*
>>> for it. And, hopefully, *never* need it. (out of sight,
>>> out of mind)
>>>
>> Ahm, what about the food items in there? Just imagine, you and your
>> family have successfully evacuated. Now dad does the manly thing and
>> starts the fire. Mom pulls out a can of Progresso, says 'Best before
>> 1998' on there, puts in can opener ... *POOF* .. *SPLAT* ... a horrid
>> stench wafts through the area ... "Oh, maybe that's why the can was
>> bulging" :-)
>
>
> Didn't they teach you about stock rotation in Europe? Once a year
> the emergency food and batteries are replaced with fresh stock, and the
> old stock is put into the regular stock.
>

That's exactly what I was explaining, to include batteries in the
rotating scheme.

> BTW, some canned goods were found in 'Old West' ghost towns that were
> about 100 years old. Other than loss of flavor, they were supposed to
> still be safe to eat.
>

We had some stuff like that in the army. As for flavor, that was rather
debatable even when "fresh" :-)

--
Regards, Joerg

http://www.analogconsultants.com/

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From: D Yuniskis on 23 Mar 2010 17:55

Hi Joerg,

Joerg wrote:
> Michael A. Terrell wrote:
>> BTW, some canned goods were found in 'Old West' ghost towns that were
>> about 100 years old. Other than loss of flavor, they were supposed to
>> still be safe to eat.
>
> We had some stuff like that in the army. As for flavor, that was rather
> debatable even when "fresh" :-)

<grin> As a kid, I spent a few months living on C-rations (research).
It's hard to imagine doing that for a prolonged period. Even the
"chocolate" was abysmal!

I am surprised, though, that things *can* stay preserved, canned,
for such a long period of time. I imagine it depends on the
foodstuffs involved, the materials from which the cans are made,
any *coatings* applied to the insides of the cans and the
mechanical integrity of those cans.

I would imagine vacuum packing something like beans in glass
(or metal) would also have a very long shelf life -- but I'm
not a big fan of legumes! :-(

From: Charlie E. on 23 Mar 2010 18:29

On Tue, 23 Mar 2010 14:55:47 -0700, D Yuniskis
<not.going.to.be(a)seen.com> wrote:

>Hi Joerg,
>
>Joerg wrote:
>> Michael A. Terrell wrote:
>>> BTW, some canned goods were found in 'Old West' ghost towns that were
>>> about 100 years old. Other than loss of flavor, they were supposed to
>>> still be safe to eat.
>>
>> We had some stuff like that in the army. As for flavor, that was rather
>> debatable even when "fresh" :-)
>
><grin> As a kid, I spent a few months living on C-rations (research).
>It's hard to imagine doing that for a prolonged period. Even the
>"chocolate" was abysmal!
>
>I am surprised, though, that things *can* stay preserved, canned,
>for such a long period of time. I imagine it depends on the
>foodstuffs involved, the materials from which the cans are made,
>any *coatings* applied to the insides of the cans and the
>mechanical integrity of those cans.
>
>I would imagine vacuum packing something like beans in glass
>(or metal) would also have a very long shelf life -- but I'm
>not a big fan of legumes! :-(

I had a similiar experience. Visiting a friend, I noticed a bunch of
boxes of C-rations sitting in the garage. Asked about them, and found
they were expired rations from a fallout shelter. I asked if I could
have some, and soon found myself in possession of about six cases of
them. Over the next few months, tried them out, and found which were
tolerable, and which were really, really bad! A couple of years
later, at ROTC summer camp, when we were issued C-rations, I knew
which ones to get, and which ones to trade... ;-)

Charlie

From: Michael A. Terrell on 23 Mar 2010 20:37

"Charlie E." wrote:
>
> I had a similiar experience. Visiting a friend, I noticed a bunch of
> boxes of C-rations sitting in the garage. Asked about them, and found
> they were expired rations from a fallout shelter. I asked if I could
> have some, and soon found myself in possession of about six cases of
> them. Over the next few months, tried them out, and found which were
> tolerable, and which were really, really bad! A couple of years
> later, at ROTC summer camp, when we were issued C-rations, I knew
> which ones to get, and which ones to trade... ;-)

Some of the ones I got while in the Army were over 20 years old. When
its -20 to -30 degrees and the only food for 15 miles, you don't
complain, if you want your next meal.

--
Lead free solder is Belgium's version of 'Hold my beer and watch this!'

From: Michael A. Terrell on 23 Mar 2010 20:38

Joerg wrote:
>
> Michael A. Terrell wrote:
> > Joerg wrote:
> >> D Yuniskis wrote:
> >>> Joerg wrote:
> >>>>> I just want something for my bugout-bag that I can rely on
> >>>>> *without* having to worry that some component (e.g., a
> >>>>> battery *buried* inside the "emergency light") has died
> >>>>> because it's been in storage for 10 years... I *think*
> >>>>> this thing will work good as there are no "components"
> >>>>> that I'd have to worry about crapping out (just the little
> >>>>> DC "motor/generator" and a bunch of mechanical bits)
> >>>>>
> >>>>> What good are emergency devices if you can't rely on
> >>>>> them in an emergency?? :>
> >>>> That's what preventive maintenance is for :-)
> >>> Bug out bag isn't something that sits in a prominent
> >>> position in the house. I.e., you've got to go *looking*
> >>> for it. And, hopefully, *never* need it. (out of sight,
> >>> out of mind)
> >>>
> >> Ahm, what about the food items in there? Just imagine, you and your
> >> family have successfully evacuated. Now dad does the manly thing and
> >> starts the fire. Mom pulls out a can of Progresso, says 'Best before
> >> 1998' on there, puts in can opener ... *POOF* .. *SPLAT* ... a horrid
> >> stench wafts through the area ... "Oh, maybe that's why the can was
> >> bulging" :-)
> >
> >
> > Didn't they teach you about stock rotation in Europe? Once a year
> > the emergency food and batteries are replaced with fresh stock, and the
> > old stock is put into the regular stock.
> >
>
> That's exactly what I was explaining, to include batteries in the
> rotating scheme.
>
> > BTW, some canned goods were found in 'Old West' ghost towns that were
> > about 100 years old. Other than loss of flavor, they were supposed to
> > still be safe to eat.
> >
>
> We had some stuff like that in the army. As for flavor, that was rather
> debatable even when "fresh" :-)

It wasn't intened to be 'good', it was meant to keep you alive.

--
Lead free solder is Belgium's version of 'Hold my beer and watch this!'