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PICList Thread
'[OT] Desperation'
2011\06\21@222303 by RussellMc

face picon face
Desperation
   Chinese hotel room
       August 2008
           Nothing sordid :-) (except technically) (VG take note)

   http://public.fotki.com/RussellMc/misc-1/piclistdesktops/pict0070-liion-char.html

You picture here:  email to   russellmc+spam_OUTPICDTTakeThisOuTspamfotki.com

Subject line = Photo title

                Russel

2011\06\21@223342 by Chris McSweeny

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Like

On Wed, Jun 22, 2011 at 3:22 AM, RussellMc <.....apptechnzKILLspamspam@spam@gmail.com> wrote:
> Desperation
>    Chinese hotel room
>        August 2008
>            Nothing sordid :-) (except technically) (VG take note)
>
>    http://public.fotki.com/RussellMc/misc-1/piclistdesktops/pict0070-liion-char.html
>
> You picture here:  email to   russellmc+PICDTspamKILLspamfotki.com
>
> Subject line = Photo title
>
>                 Russell
>

2011\06\21@231348 by Veronica Merryfield

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On 2011-06-21, at 7:33 PM, Chris McSweeny wrote:

> Like

Seconded. Never had to do this in a hotel room but done plenty of similar things, often with the phone or network lines.

{Quote hidden}

2011\06\22@001658 by RussellMc

face picon face
>>> Desperation
>>>    Chinese hotel room
>>>        August 2008
>>>            Nothing sordid :-) (except technically) (VG take note)
>>>
>>>    http://public.fotki.com/RussellMc/misc-1/piclistdesktops/pict0070-liion-char.html

> Chris McSweeny wrote:
>> Like

> Veronica Merryfield wrote:
>> Seconded. Never had to do this in a hotel room but done
>> plenty of similar things, often with the phone or network lines.

Phone line.
Yes !!!
Constant current source ! :-)
Near universally available.
Adaptor cord may be found on many office desks.
"Hello, .... hello ...?"
Somewhat slow charge, but needs must.
Whipping up a GSR would give about 10:1 charge boost into a single
LiIon or 5:1 for DSLR  (DSLR camera batteries typically use 2 cells in
series)

Then there's the room PC's USB ports.
....
Checkout: "Sir, room service reports that the cord is missing from the
'mouse' in your room."



        R


{Quote hidden}

>

2011\06\22@020629 by V G

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On Wed, Jun 22, 2011 at 12:16 AM, RussellMc <KILLspamapptechnzKILLspamspamgmail.com> wrote:

>  > Veronica Merryfield wrote:
> >> Seconded. Never had to do this in a hotel room but done
> >> plenty of similar things, often with the phone or network lines.
>

Yeah, had to do crazy things like that too at certain points. It was a
really cold winter storm and the roads were very dangerous. I had almost
nothing at my apartment and an old drained cell phone. I had to dismantle
the intercom thing in my apartment and somehow managed to find a 5V (or was
it 6V?) line to charge the battery. Obviously dangerous to overcharge at 5V,
but did it for a few minutes just to get a bit of emergency talk time.

Phone line.
> Yes !!!
> Constant current source ! :-)
>

Seriously - is it? How many mA? Maximum voltage? Useful information if I
ever need it.


> Near universally available.
> Adaptor cord may be found on many office desks.
> "Hello, .... hello ...?"
> Somewhat slow charge, but needs must.
> Whipping up a GSR would give about 10:1 charge boost into a single
>

What's a GSR?


> LiIon or 5:1 for DSLR  (DSLR camera batteries typically use 2 cells in
> series)
>
> Then there's the room PC's USB ports.
> ...
> Checkout: "Sir, room service reports that the cord is missing from the
> 'mouse' in your room."



Had to do that more than once

2011\06\22@033912 by Michael Watterson

face picon face
On 22/06/2011 07:06, V G wrote:
> Seriously - is it? How many mA? Maximum voltage? Useful information if I
> ever need it.

About nominal 48V open circuit (Historically about 40V to 56V as it was 24 x 2V lead acid, (or 4 x 6v, or 2 x 12V) on float charge).
Drops to about 9V when a phone is off hook, so I'd guess about 5mA?

Er... Ringing voltage isn't pleasant.

Most Telcos regard it as theft though

2011\06\22@043104 by Yigit Turgut

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I like it and would like to share a similar experience (:

In 2009 summer I was on a vacation in south coast of France,  I rented
the safe in the room and used it for a couple of days. It took me a
while to realize the bug in safe controller algorithm due to alcohol
emission and such ; when the PIN was typed really fast (4 digits in a
sec or so) the LCD on it prints the first and last digit of the PIN
where other digits are shown as asterisk. It was probably designed for
jtag interface for some sort of diagnostics. I cracked the safe open
and ripped apart the controller board on it. Chin Chinn -- PIC 16f875
was running inside. I took the mcu with me to Turkey and reversed the
code in it where I found an obvious bug. Reported the vendor (I think
it was german) and shipped the mcu back to the hotel. I am not sure if
they put it back or threw the mcu away but I am pretty sure that the
vendor fixed it. It was a lame safe but I cared for it. Back then I
was following responsible disclosure policy but now I don't care that
much. Especially after I submit a huge fully reproducible bug in IE7
in 2010 and got nothing, not even a thanks. (I was fit for a thanks
but it never came).



On Wed, Jun 22, 2011 at 5:22 AM, RussellMc <RemoveMEapptechnzTakeThisOuTspamgmail.com> wrote:
{Quote hidden}

>

2011\06\22@051020 by RussellMc

face picon face
> Phone line.
>> Yes !!!
>> Constant current source ! :-)

> Seriously - is it? How many mA? Maximum voltage? Useful information if I
> ever need it.

Approximates constant current.
Value will change with line length and situation.
Some circuits will shut down if shorted.

Looks like about -50 Volts wrt ground for central office phones. PBC
are often 50V but also may be less.

Probably 100+ mA up close to CO (Central Office)
Custmer line can be 1000 Ohm so at 50 V that alone would limit  I to 20 mA.
Safer is to assume it is over current regulated 50V supply.

If line is not to be tripped to off-hook state allowable current is
low . Under to well under 1 mA.

>> Whipping up a GSR would give about 10:1 charge boost into a single

> What's a GSR?

"God's Switching Regulator".
But a fair ring in is seen here

     http://sound.westhost.com//appnotes/an006.htm



2011\06\22@103924 by Herbert Graf

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Next time have something like this with you:

https://www.dealextreme.com/p/universal-cell-phone-lithium-battery-charger-white-100-240v-71874

I have two. This one will charge pretty much any single cell lithium ion
battery. There are others for other configs.

TTYL

On Wed, 2011-06-22 at 14:22 +1200, RussellMc wrote:
{Quote hidden}

2011\06\22@133110 by RussellMc

face picon face
> Next time have something like this with you:
>
> https://www.dealextreme.com/p/universal-cell-phone-lithium-battery-charger-white-100-240v-71874
>
> I have two. This one will charge pretty much any single cell lithium ion
> battery. There are others for other configs.
>

If I can leave the real charger behind I can leave that one too :-).
May have been at factory.
May have been on lounge floor :-)
The latter I think.

They sell single cell chargers in the markets - swivel arms you adjust
for cell of choice.
Two cell ones less known.

2011\06\22@140522 by Herbert Graf

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On Thu, 2011-06-23 at 05:30 +1200, RussellMc wrote:
> > Next time have something like this with you:
> >
> > www.dealextreme.com/p/universal-cell-phone-lithium-battery-charger-white-100-240v-71874
> >
> > I have two. This one will charge pretty much any single cell lithium ion
> > battery. There are others for other configs.
> >
>
> If I can leave the real charger behind I can leave that one too :-).

That's very true.
The difference for me of course is those two chargers live in my carry
on bag and my suitcase. They don't leave, even when I'm at home (since I
don't generally need them at home).

There is nothing more frustrating than not having a charger. Went on a
trip last year to Mexico. Bought a waterproof point and shoot just for
that trip (also had my normal point and shoot with me). Got to the
destination and realized I'd packed a charger for a camera I didn't
bring. Had to ration that one charge on the point and shoot. Actually
managed to not exhaust the battery by the end of the trip (it took far
more pictures on that charge then I expected), but I certainly didn't
use it as much as I'd have liked.

Never even considered using the phone line or something like that to
charge it!

This has been a very educational thread for me! :)

TTYL

2011\06\22@143138 by Spehro Pefhany

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At 10:22 PM 21/06/2011, you wrote:
>Desperation
>     Chinese hotel room
>         August 2008
>             Nothing sordid :-) (except technically) (VG take note)
>
>
>http://public.fotki.com/RussellMc/misc-1/piclistdesktops/pict0070-liion-char.html
>
>You picture here:  email to   russellmc+RemoveMEPICDTspamTakeThisOuTfotki.com
>
>Subject line = Photo title
>
>                  Russell

Nice work. Worked up a 'charger' one time using toilet paper tubes,
disposable cells, paperclips etc. when I was caught short in Sarawak.

Looked like a bomb. Worked well enough that I got at least some photos.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speffEraseMEspam.....interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

2011\06\22@152848 by V G

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On Wed, Jun 22, 2011 at 3:38 AM, Michael Watterson <EraseMEmikespamradioway.org>wrote:

> About nominal 48V open circuit (Historically about 40V to 56V as it was
> 24 x 2V lead acid, (or 4 x 6v, or 2 x 12V) on float charge).
> Drops to about 9V when a phone is off hook, so I'd guess about 5mA?
>
> Er... Ringing voltage isn't pleasant.
>
> Most Telcos regard it as theft though.
>
>
It's okay. I consider them to be thieves as well.

If anything goes wrong, blame it on a faulty phone.

Haha

2011\06\22@153039 by V G

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On Wed, Jun 22, 2011 at 5:09 AM, RussellMc <RemoveMEapptechnzEraseMEspamEraseMEgmail.com> wrote:

> "God's Switching Regulator".
> But a fair ring in is seen here
>

Never heard of this. What does the concept of god have anything to do with a
switching regulator?

Honest question

2011\06\22@170025 by Barry Gershenfeld

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>
> Never heard of this. What does the concept of god have anything to do with
> a
> switching regulator?
>
> Honest question.
>

Is he paying you to ask the straight lines? :)

So, imagine you woke up one morning with an idea for a circuit, a complete
one, and you built it, and it worked without needing changes.  And you knew
this wasn't something you were normally capable of.  What would you
attribute it to?  Even if in fun?  Even if you just wanted a metaphor for
it

2011\06\22@170431 by V G

picon face
On Wed, Jun 22, 2011 at 5:00 PM, Barry Gershenfeld <RemoveMEgbarry42spam_OUTspamKILLspamgmail.com>wrote:

> Is he paying you to ask the straight lines? :)
>
> So, imagine you woke up one morning with an idea for a circuit, a complete
> one, and you built it, and it worked without needing changes.  And you knew
> this wasn't something you were normally capable of.  What would you
> attribute it to?  Even if in fun?  Even if you just wanted a metaphor for
> it.
>

I still don't understand. It would be attributed to chance

2011\06\22@172953 by RussellMc

face picon face
>> Never heard of this. What does the concept of god have anything to do with
>> a
>> switching regulator?
>>
>> Honest question.

> Is he paying you to ask the straight lines? :)

> So, imagine you woke up one morning with an idea for a circuit, a complete
> one, and you built it, and it worked without needing changes.  And you knew
> this wasn't something you were normally capable of.  What would you
> attribute it to?  Even if in fun?  Even if you just wanted a metaphor for
> it.

Rushing.
More anon maybe.

Note: I too can "explain away" any "miraculous " occurrences. Some
manage to explain away occurrences with probabilities that far
outweigh the capabilities of the universe to produce the observed
result. (eg Proton decay may be more probable). If these are no
problem to true-disbelievers then any "miracle" that I can muster will
be easily dismissed.

Impossibilish spec.
Out of time.
No budget
Much thought had been expended.
Glasshouse at bottom of garden.
Set a while... .
Write a spec. Not overly technical terms but specific.
About 10points.
Add date and time.
Sign it (not anything I'd ever done before).
Stand up and walk up yard though garden.
10 seconds (maybe it took that long to realise).
The full design (very simple in reality)(as the spec required).
Built and running in an hour to two hours.
Met every point.
That was 2001.
Yes, of course I still have the piece of paper (or a copy?) - taped on
toilet door with other interesting stuff..
10 seconds isn't bad.
Yes, of course it can be explained away.
So can abiogenesis :-)


           R

2011\06\22@211024 by Carey Fisher

face picon face
On Wed, Jun 22, 2011 at 5:29 PM, RussellMc <RemoveMEapptechnzTakeThisOuTspamspamgmail.com> wrote:

> >> Never heard of this. What does the concept of god have anything to do
> with
> >> a
> >> switching regulator?
> >>
>
..........................

> So can abiogenesis :-)
>
>
>            R
>

Once again Russell, thank you for an hour-long "research" distraction. I'd
read about the Miller-Urey experiment but there's a lot more to the various
theories than I was aware of.
Care

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