Car cigar-lighter plug-ins

[foggy]

Just curious.
My mobile phone is powered by a 6v battery (4x1.5).
My car has a 12v battery.
I have an in-car cigar-lighter plug-in for the phone.
Does this adapt the voltage to 6v and if so how?
It looks like a simple plug and cable.
Thanks for any answers.
foggy

 

[Peter Hawken]

"foggy" <foggy.hill@nospam.com> wrote in message
news:Khjac.2739$qP2.9302@news.indigo.ie...

Just curious.
My mobile phone is powered by a 6v battery (4x1.5).
My car has a 12v battery.
I have an in-car cigar-lighter plug-in for the phone.
Does this adapt the voltage to 6v and if so how?
It looks like a simple plug and cable.
Thanks for any answers.
foggy



In order to charge a 6V battery, the incoming supply needs to be higher than

the peak voltage that the battery will reach during charge. For example, a
1.2V NiMH cell will reach about 1.5V when fully charged. Your 6V battery
pack will reach in excess of 7V (I'm not sure of the voltages for Li Ion
cells) and theincoming voltage needs to be higher than that, so the phone is
quite likely to accept 12V or more and regulate it to the voltage required
to charge the battery and to power the phone. However, before you plug the
phone into a 12V supply, it might be worth checking for any reguilation in
the car connector - you can fit a lot of circuit into one of those
connectors. It will be obvious once you look inside whether there is any
circuitry in there or not.

 

[Don Bruder]

In article <Khjac.2739$qP2.9302@news.indigo.ie>,
"foggy" <foggy.hill@nospam.com> wrote:

Just curious.
My mobile phone is powered by a 6v battery (4x1.5).
My car has a 12v battery.
I have an in-car cigar-lighter plug-in for the phone.
Does this adapt the voltage to 6v and if so how?
It looks like a simple plug and cable.
Thanks for any answers.

Either the plug itself (There's plenty of room for all kinds of nifty
electronic wizardry inside the lighter-socket plug with the size of
components these days) or the phone takes care of regulating the voltage
to what the phone actually needs. Chances are good that you could run a
pretty wide range of voltages (at least 7-8 volts as a minimum, though -
to charge a battery, you need more voltage than the battery's "fully
charged" voltage) into that plug and have things work exactly as they
should. Of course, if you're going to "experiment" that way, you better
keep an eye on your upper limit, otherwise you're likely to cook
something. I don't think I'd try feeding it anything more than about
18-24 volts.

--
Don Bruder - dakidd@sonic.net - New Email policy in effect as of Feb. 21, 2004.
I respond to Email as quick as humanly possible. If you Email me and get no
response, see <http://www.sonic.net/~dakidd/main/contact.html> Short
form: I'm trashing EVERYTHING that doesn't contain a password in the subject.

 

[JeB]

On Tue, 30 Mar 2004 19:47:00 +0100, "foggy" <foggy.hill@nospam.com>
wrote:

Just curious.
My mobile phone is powered by a 6v battery (4x1.5).
My car has a 12v battery.
I have an in-car cigar-lighter plug-in for the phone.
Does this adapt the voltage to 6v and if so how?

a "chip" type regulator can adapt voltage by either burning off the
excess as heat (a linear regulator) or turning the higher volatage off
and on very fast (a switching regulator) to get the desired voltage.

 

[Jeffrey Turner]

Don Bruder wrote:

"foggy" <foggy.hill@nospam.com> wrote:


Just curious.
My mobile phone is powered by a 6v battery (4x1.5).
My car has a 12v battery.
I have an in-car cigar-lighter plug-in for the phone.
Does this adapt the voltage to 6v and if so how?
It looks like a simple plug and cable.
Thanks for any answers.


Either the plug itself (There's plenty of room for all kinds of nifty
electronic wizardry inside the lighter-socket plug with the size of
components these days)

Amazing, isn't it? There's all sorts of complicated electronics
inside a little mobile phone for transmitting and receiving the
signals - and most of the space is for the batteries, the keypad
and the structural plastic - but the voltage adapter gets the
question. Just amazing.

--Jeff

or the phone takes care of regulating the voltage
to what the phone actually needs. Chances are good that you could run a
pretty wide range of voltages (at least 7-8 volts as a minimum, though -
to charge a battery, you need more voltage than the battery's "fully
charged" voltage) into that plug and have things work exactly as they
should. Of course, if you're going to "experiment" that way, you better
keep an eye on your upper limit, otherwise you're likely to cook
something. I don't think I'd try feeding it anything more than about
18-24 volts.
--

A man, a plan, a cat, a canal - Panama!

Ho, ho, ho, hee, hee, hee
and a couple of ha, ha, has;
That's how we pass the day away,
in the merry old land of Oz.

 

[foggy]

JeB <no@spam.org> wrote in message
news:im2m605f4p8ob9rd85t1de07mkjjb1fl3d@4ax.com...

On Tue, 30 Mar 2004 19:47:00 +0100, "foggy" <foggy.hill@nospam.com
wrote:

snip

Thanks for all the answers.
Cleared up a few things.
Thanks.
foggy