Wireless at Osh

Try this. I bought one last year from this guy. Works great.


http://cgi.ebay.com/Brand-New-12V-Br...QQcmdZViewItem





..Blueskies. wrote:

"john smith" wrote in message
...

In article , John T
wrote:


This has been a recurring topic with no clear answers.

I say, hoof it over to the hilton. They have wireless for their guests.
There is no sign on page, but I have no idea what their range is.

And someone will be sitting there with their laptop watching everything
streaming by in the ether. Google "ethereal" for more information. :-))
Beware of ARP cache poisoning, also.
Never use any program which transmits any of your passwords over an open
wireless network.


What about power for the laptop while camping by the plane. I don't think using an inverter through the aircraft battery
would be a good idea ;-)

I could see were this would come in very handy.
Lou

Newps wrote:
Try this. I bought one last year from this guy. Works great.


http://cgi.ebay.com/Brand-New-12V-Br...QQcmdZViewItem




Can you just hook this up directly to maybe a sealed lead acid battery
or a gel cell and charge it? I've never been clear on whether or not
electronic circuits are used to prevent overcharging or whether one of
these puts out enough juice to be concerned.

Tom

Most small solar panels have low amperage and will not over
charge a wet cell battery. If they were used to directly
charge a dry cell battery, such as a C or D cell they might
over charge, but a wet cell battery with an AHr rating of 25
amps can be charged indefinitely at a rate of 2-3 amps and
you will be using the battery to run an inverter to power
various other loads.


"Tom McQuinn" wrote in message
...
| Newps wrote:
| Try this. I bought one last year from this guy. Works
great.
|
|
|
http://cgi.ebay.com/Brand-New-12V-Br...QQcmdZViewItem
|
|
|
|
| Can you just hook this up directly to maybe a sealed lead
acid battery
| or a gel cell and charge it? I've never been clear on
whether or not
| electronic circuits are used to prevent overcharging or
whether one of
| these puts out enough juice to be concerned.
|
| Tom

On Sun, 25 Jun 2006 09:51:51 -0500, "Jim Macklin"
wrote in
JTxng.49575$ZW3.40014@dukeread04::

Most small solar panels have low amperage and will not over
charge a wet cell battery.

The solar panel mentioned has a 13 watt rating. That's a little over
1 amp at 12 volts (in full sun).

I looked up the item after I sent it out, the specs say 750
milliwatt and 14 volts. It is a good trickle charger, as
long as you don't put too much load on the battery. It
should do fine for charging cellphones, cameras, and even
the laptop. But if they are all on the inverter at one time,
the battery will be discharged.



"Larry Dighera" wrote in message
...
| On Sun, 25 Jun 2006 09:51:51 -0500, "Jim Macklin"
| wrote in
| JTxng.49575$ZW3.40014@dukeread04::
|
| Most small solar panels have low amperage and will not
over
| charge a wet cell battery.
|
| The solar panel mentioned has a 13 watt rating. That's a
little over
| 1 amp at 12 volts (in full sun).
|

meant to say 750 milliamps (3/4 of an amp).


"Jim Macklin" wrote
in message news:h9Cng.49592$ZW3.38038@dukeread04...
|I looked up the item after I sent it out, the specs say 750
| milliwatt and 14 volts. It is a good trickle charger, as
| long as you don't put too much load on the battery. It
| should do fine for charging cellphones, cameras, and even
| the laptop. But if they are all on the inverter at one
time,
| the battery will be discharged.
|
|
|
| "Larry Dighera" wrote in message
| ...
|| On Sun, 25 Jun 2006 09:51:51 -0500, "Jim Macklin"
|| wrote in
|| JTxng.49575$ZW3.40014@dukeread04::
||
|| Most small solar panels have low amperage and will not
| over
|| charge a wet cell battery.
||
|| The solar panel mentioned has a 13 watt rating. That's a
| little over
|| 1 amp at 12 volts (in full sun).
||
|
|

"Jim Macklin" wrote in message
news:JTxng.49575$ZW3.40014@dukeread04...
Most small solar panels have low amperage and will not over
charge a wet cell battery. If they were used to directly
charge a dry cell battery, such as a C or D cell they might
over charge, but a wet cell battery with an AHr rating of 25
amps can be charged indefinitely at a rate of 2-3 amps and
you will be using the battery to run an inverter to power
various other loads.

This may be true for a few days of operation at a campsite, but overcharging
is overcharging, and it will eventually trash your battery. Take it from a guy
who ruined far too many batteries with cheap one-amp trickle chargers before he
learned. In general, solar panels need charge controllers for long-term
successful operation.

Vaughn

Probably true, but this is a week long camping trip, with
the battery being used as the power source for an inverter
to use the 110 VAC to charge the laptop. It would be best
to get a cigarette lighter adapter for the cellphone and
skip the step of the inverter.

If you fly-in, just go to a nearby store and buy a cheap car
battery and after the event, donate it to the shop for the
airport beater or tractor.



"Vaughn Simon" wrote in
message
...
|
| "Jim Macklin" wrote
in message
| news:JTxng.49575$ZW3.40014@dukeread04...
| Most small solar panels have low amperage and will not
over
| charge a wet cell battery. If they were used to
directly
| charge a dry cell battery, such as a C or D cell they
might
| over charge, but a wet cell battery with an AHr rating
of 25
| amps can be charged indefinitely at a rate of 2-3 amps
and
| you will be using the battery to run an inverter to
power
| various other loads.
|
| This may be true for a few days of operation at a
campsite, but overcharging
| is overcharging, and it will eventually trash your
battery. Take it from a guy
| who ruined far too many batteries with cheap one-amp
trickle chargers before he
| learned. In general, solar panels need charge controllers
for long-term
| successful operation.
|
| Vaughn
|
|

Jim Macklin wrote:

Most small solar panels have low amperage and will not over
charge a wet cell battery. If they were used to directly
charge a dry cell battery, such as a C or D cell they might
over charge, but a wet cell battery with an AHr rating of 25
amps can be charged indefinitely at a rate of 2-3 amps and
you will be using the battery to run an inverter to power
various other loads.

Your understanding of electricity is only exceeded by your understanding
of stall dynamics. It would take in increasing voltage to maintain 2
amps into a wet cell battery as it becomes charged. If you maintain
that rate for more than 12-13 hours, you will soon ruin the battery.
The good news is that most chargers (and certainly a PV cell) maintain a
roughly constant voltage so that the amperage tapers off as the battery
approaches full charge.


Matt