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  #1 (permalink)  
Old 10-04-2006, 06:00 PM
HotRod
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Default Linksys WRT54G Power issues Have you ever had this?

I have two Linksys WRT54G V1.? wireless routers that are designed to run
on 5V DC. A few weeks ago both routers, located at different locations 1/2
km apart failed. Upon further investigation I've determinded that the power
supplies both failed at the same time, however there was still enough power
to keep the lights up and running but the routers would not complete their
diagnostic test and just left the diagnostic light on.

I grabber a 5v power supply from on of our other Linksys routers and
both "wrecked" routers started functioning normally, SO I found some 5V DC
power supplies from other sources, tested them with a meter and then plugged
them into the routers. THEY DON'T WORK. What is so unique about the Linksys
5V powersupply? I ended up trying three different styles of power including
taking 5V DC from a USB port.

IDEAS, COMMENTS.



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  #2 (permalink)  
Old 10-04-2006, 06:29 PM
Bryant Smith
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

HotRod wrote:
> I have two Linksys WRT54G V1.? wireless routers that are designed to run
> on 5V DC. A few weeks ago both routers, located at different locations 1/2
> km apart failed. Upon further investigation I've determinded that the power
> supplies both failed at the same time, however there was still enough power
> to keep the lights up and running but the routers would not complete their
> diagnostic test and just left the diagnostic light on.
>
> I grabber a 5v power supply from on of our other Linksys routers and
> both "wrecked" routers started functioning normally, SO I found some 5V DC
> power supplies from other sources, tested them with a meter and then plugged
> them into the routers. THEY DON'T WORK. What is so unique about the Linksys
> 5V powersupply? I ended up trying three different styles of power including
> taking 5V DC from a USB port.
>
> IDEAS, COMMENTS.
>
>


There are two parts to the power adapter rating: The voltage and the
current. What is the current output rating of the other adapters that
don't? It could be that the routers take 1-2 Amps and the generic
adapters are capable of less than that. A USB port can only source
500mA per hub which unlikely to be able to power an entire router.

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  #3 (permalink)  
Old 10-05-2006, 01:49 AM
Peter Pan
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

Bryant Smith wrote:
> HotRod wrote:
>> I have two Linksys WRT54G V1.? wireless routers that are
>> designed to run on 5V DC. A few weeks ago both routers, located at
>> different locations 1/2 km apart failed. Upon further investigation
>> I've determinded that the power supplies both failed at the same
>> time, however there was still enough power to keep the lights up and
>> running but the routers would not complete their diagnostic test and
>> just left the diagnostic light on. I grabber a 5v power supply from on of
>> our other Linksys routers
>> and both "wrecked" routers started functioning normally, SO I found
>> some 5V DC power supplies from other sources, tested them with a
>> meter and then plugged them into the routers. THEY DON'T WORK. What
>> is so unique about the Linksys 5V powersupply? I ended up trying
>> three different styles of power including taking 5V DC from a USB
>> port. IDEAS, COMMENTS.
>>
>>

>
> There are two parts to the power adapter rating: The voltage and the
> current. What is the current output rating of the other adapters that
> don't? It could be that the routers take 1-2 Amps and the generic
> adapters are capable of less than that. A USB port can only source
> 500mA per hub which unlikely to be able to power an entire router.


The older ones (my v2 was 1000 ma), but the newer ones are 500 ma.. And
won't run the older ones (same problem for me too).. However, the newer N
(probably pre-n but not called that) have 1000 ma adapters again, and when I
used that one on my v2 (that wouldn't work with the 500ma), worked fine...



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  #4 (permalink)  
Old 10-05-2006, 02:10 AM
Tony Hwang
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

HotRod wrote:
> I have two Linksys WRT54G V1.? wireless routers that are designed to run
> on 5V DC. A few weeks ago both routers, located at different locations 1/2
> km apart failed. Upon further investigation I've determinded that the power
> supplies both failed at the same time, however there was still enough power
> to keep the lights up and running but the routers would not complete their
> diagnostic test and just left the diagnostic light on.
>
> I grabber a 5v power supply from on of our other Linksys routers and
> both "wrecked" routers started functioning normally, SO I found some 5V DC
> power supplies from other sources, tested them with a meter and then plugged
> them into the routers. THEY DON'T WORK. What is so unique about the Linksys
> 5V powersupply? I ended up trying three different styles of power including
> taking 5V DC from a USB port.
>
> IDEAS, COMMENTS.
>
>

Hi,
Compatible Polarity, Voltage, Current rating?

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  #5 (permalink)  
Old 10-05-2006, 03:07 AM
hstamm
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

On Wed, 4 Oct 2006 14:00:48 -0400, "HotRod" <NoSpam@YourEmail.com>
wrote:

> I have two Linksys WRT54G V1.?


Snip....snip...

Bryant got it right.
You have to look for the same specification, and in top of it, the
power supply should be a "switched" power supply.

Specs: Model: 12100SA
Input: 240v 110 mA
Output: 12VDC 1000 mA

Regards
Helmut



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  #6 (permalink)  
Old 10-05-2006, 03:13 AM
hstamm
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

On Wed, 4 Oct 2006 14:00:48 -0400, "HotRod" <NoSpam@YourEmail.com>
wrote:

> I have two Linksys WRT54G V1.?


snip.... snip....

Sorry, just in case you're in the USA, please select the input voltage
according to your local currency.

Regards
Helmut


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  #7 (permalink)  
Old 10-05-2006, 03:50 AM
Jeff Liebermann
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

"HotRod" <NoSpam@YourEmail.com> hath wroth:

> I have two Linksys WRT54G V1.? wireless routers that are designed to run
>on 5V DC.


Actually, the WRT54G/GS will run on anything between 3.7VDC and about
18VDC. The internal switching regulator has a very wide input voltage
range. For my WRT54G v1.1:
Volts Amps
15 0.25
12 0.3
5 0.8
4 1.0


>A few weeks ago both routers, located at different locations 1/2
>km apart failed. Upon further investigation I've determinded that the power
>supplies both failed at the same time, however there was still enough power
>to keep the lights up and running but the routers would not complete their
>diagnostic test and just left the diagnostic light on.


Yep. The original v1.x WRT54G routers used 5V 2A(?) power supplies.
They were junk. I've lost 2 or 3 of them at various locations. Later
revisions use 12V 1A power supplies which had a better survival
record.

> I grabber a 5v power supply from on of our other Linksys routers and
>both "wrecked" routers started functioning normally, SO I found some 5V DC
>power supplies from other sources, tested them with a meter and then plugged
>them into the routers. THEY DON'T WORK.


I'll assume that "they don't work" means that the lights don't turn
on.

Careful. Just because they say 5V doesn't mean that they will work.
You need to verify that it has the proper connector. If the hole in
the power supply connector is too large, it won't make a connection.
Same with current rating. If it draws 0.8A at 5VDC, then methinks the
minimum rated current should be 1.5A. Any less and it will probably
get quite warm.

Of course, it has to be 5VDC, not AC and should be a positive center
pin, not a negative. Use a digital volts guesser if you're not sure.
If you plugged in an AC or reverse polarized adapter, you probably
fried the internal protection diode. It's a fairly easy replacement.

>What is so unique about the Linksys
>5V powersupply? I ended up trying three different styles of power including
>taking 5V DC from a USB port.


5V from a USB port is current limited to 1A total. You might be able
to run the WRT54G from a USB port, but I suspect the initial inrush
current (charging the cazapitors) might cause the USB overcurrent
protection to cause the port to shut down.

>IDEAS, COMMENTS.


Beware the ideas of March.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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  #8 (permalink)  
Old 10-05-2006, 12:50 PM
HotRod
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Default Re: Linksys WRT54G Power issues Have you ever had this?

On the early WRT54G's you can only power them with the proper polarity, if
it's reversed the will not light up at all. I believe that I need to find a
power supply with a little more amprage as the two I've been trying are only
300ma and 500ma, when I get my hands on one that is 1-2 amps I'll give it a
try.



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  #9 (permalink)  
Old 10-05-2006, 03:59 PM
HotRod
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Default Re: Linksys WRT54G Power issues Have you ever had this?

OK thats it I've decided to dive right over the cliff and take this "Work
Around" to the extreme. This is what I'm going to try using two Linksys
WRT54G routers that aren't working right now and an old PC.

I will be pulling the 5V DC from the PC tower, and hooking it into pins 4,5
and 7,8 on my ethernet card in order to facilitate my own version of POE
"Power over Ethernet". IF this goes right I'll have the PC power the Router
which works great because I only need the router powered up when the
computer is on anyway.

I'll post back if I fry something or if it goes OK. f it works others could
pull from the 12V side of the tower to power their owen routers. Actually it
might make sense for me to add a switch right away to select between 5V and
12V just in case I change my router.


YES I KNOW I'm NUTS



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  #10 (permalink)  
Old 10-05-2006, 04:28 PM
Jeff Liebermann
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Default Re: Linksys WRT54G Power issues Have you ever had this?

"HotRod" <NoSpam@YourEmail.com> hath wroth:

>OK thats it I've decided to dive right over the cliff and take this "Work
>Around" to the extreme. This is what I'm going to try using two Linksys
>WRT54G routers that aren't working right now and an old PC.


Oh-oh. Welcome to Learn By Destroying(tm).

>I will be pulling the 5V DC from the PC tower, and hooking it into pins 4,5
>and 7,8 on my ethernet card in order to facilitate my own version of POE
>"Power over Ethernet". IF this goes right I'll have the PC power the Router
>which works great because I only need the router powered up when the
>computer is on anyway.


Use the 12V instead of the 5V. My guess(tm) is that you're going to
run a fairly long length of CAT5 between your PC source of power and
that WRT54G. You'll have less voltage loss in the CAT5 if you use the
higher 12v voltage. See:
| http://groups.google.com/group/alt.i...22ff4585ef4381
for a sample cable loss calculation.

Also, be sure to add some filtering at the WRT54G. There's a
non-trivial amount of high frequency crud coming out of the typical PC
that nearby AM/FM/SSB/TV/whatever receivers will not appreciate.

>I'll post back if I fry something or if it goes OK. f it works others could
>pull from the 12V side of the tower to power their owen routers. Actually it
>might make sense for me to add a switch right away to select between 5V and
>12V just in case I change my router.


Don't bother with the switch. However, a fuse would be nice.

>YES I KNOW I'm NUTS


Not really. It will work. I made a few metal brackets for the back
of PC's with a cheapo power connector and fuse for the purpose. It's
quite useful in cramped relay racks and cabinets full of odd boxes.
Mostly, I use them to power USB hubs.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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  #11 (permalink)  
Old 10-05-2006, 06:57 PM
HotRod
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

Thanks Jeff, however for the time being I'm going toonly run a few feet of
Cat5 cable. The biggest problem I have at home and work is way to many
things to plub in around my PC's Right now at work I have all of these on
there own plug right next to my desk.

1) Notebook
2) Two LCD screens
3) PDA
4) Cell phone dock
5) Radio
6) Bluetooth headset
7) Finger print reader
8) 2 Routers
9) USB Hub
10) external DVD Burner
11) Computer
12) Speakers
13) Heated Chair

Probably something I'm missing, but I'm sure if everyone would use a common
power voltage you could make a single plug that would power 4 or 5 low
voltage items.




"Jeff Liebermann" <jeffl@comix.santa-cruz.ca.us> wrote in message
news:9ubai2lo0utrbitn8es29v82u7vngp6pv9@4ax.com...
> "HotRod" <NoSpam@YourEmail.com> hath wroth:
>
>>OK thats it I've decided to dive right over the cliff and take this "Work
>>Around" to the extreme. This is what I'm going to try using two Linksys
>>WRT54G routers that aren't working right now and an old PC.

>
> Oh-oh. Welcome to Learn By Destroying(tm).
>
>>I will be pulling the 5V DC from the PC tower, and hooking it into pins
>>4,5
>>and 7,8 on my ethernet card in order to facilitate my own version of POE
>>"Power over Ethernet". IF this goes right I'll have the PC power the
>>Router
>>which works great because I only need the router powered up when the
>>computer is on anyway.

>
> Use the 12V instead of the 5V. My guess(tm) is that you're going to
> run a fairly long length of CAT5 between your PC source of power and
> that WRT54G. You'll have less voltage loss in the CAT5 if you use the
> higher 12v voltage. See:
> |
> http://groups.google.com/group/alt.i...22ff4585ef4381
> for a sample cable loss calculation.
>
> Also, be sure to add some filtering at the WRT54G. There's a
> non-trivial amount of high frequency crud coming out of the typical PC
> that nearby AM/FM/SSB/TV/whatever receivers will not appreciate.
>
>>I'll post back if I fry something or if it goes OK. f it works others
>>could
>>pull from the 12V side of the tower to power their owen routers. Actually
>>it
>>might make sense for me to add a switch right away to select between 5V
>>and
>>12V just in case I change my router.

>
> Don't bother with the switch. However, a fuse would be nice.
>
>>YES I KNOW I'm NUTS

>
> Not really. It will work. I made a few metal brackets for the back
> of PC's with a cheapo power connector and fuse for the purpose. It's
> quite useful in cramped relay racks and cabinets full of odd boxes.
> Mostly, I use them to power USB hubs.
>
> --
> Jeff Liebermann jeffl@comix.santa-cruz.ca.us
> 150 Felker St #D http://www.LearnByDestroying.com
> Santa Cruz CA 95060 http://802.11junk.com
> Skype: JeffLiebermann AE6KS 831-336-2558




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  #12 (permalink)  
Old 10-05-2006, 10:48 PM
Jeff Liebermann
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

On Thu, 5 Oct 2006 14:57:12 -0400, "HotRod" <NoSpam@YourEmail.com>
wrote:

>Probably something I'm missing, but I'm sure if everyone would use a common
>power voltage you could make a single plug that would power 4 or 5 low
>voltage items.


Bochert had something like what you want. A common power supply would
go from 117VAC to a 48VDC bus. Sitting on the bus would be multiple
individual switching regulators to go down to 12V, 9V, 5V, and 3V DC.
Very expensive but also very handy.

I have an "octupus" with a bunch of power plugs going to a 0.093 Molex
2 pin connector for 12VDC. That takes care of everything that runs on
12VDC (DSL modem, router, wireless, switch). The 12V comes from a big
gel cell battery and a float charger. Very handy when the power dies.


--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558 jeffl@comix.santa-cruz.ca.us
# http://802.11junk.com jeffl@cruzio.com
# http://www.LearnByDestroying.com AE6KS

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  #13 (permalink)  
Old 10-06-2006, 12:30 PM
HotRod
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

"Very handy when the power dies"


I'm not sure I want things to work when the power dies. The way my office is
setup now everything on the south side of the building was wired new and
still has power when the rest of the building goes black. This sucks since
95% of the employees are on the North side and get to hang out at the water
cooler or go home. ME I get to keep working.



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  #14 (permalink)  
Old 10-06-2006, 03:51 PM
Percival P. Cassidy
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

On 10/04/06 11:50 pm Jeff Liebermann wrote:

> Yep. The original v1.x WRT54G routers used 5V 2A(?) power supplies.
> They were junk. I've lost 2 or 3 of them at various locations. Later
> revisions use 12V 1A power supplies which had a better survival
> record.


My ver. 1.0 WRT54G with 5v 2A p/s has been going for at least 3 years
(it was unused for a couple of years because I thought it was toast, but
it worked fine after a full reset and is now operating as an Access Point).

Perce

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  #15 (permalink)  
Old 10-06-2006, 03:55 PM
Percival P. Cassidy
Guest
 
Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

On 10/05/06 06:48 pm Jeff Liebermann wrote:

> I have an "octupus" with a bunch of power plugs going to a 0.093 Molex
> 2 pin connector for 12VDC. That takes care of everything that runs on
> 12VDC (DSL modem, router, wireless, switch). The 12V comes from a big
> gel cell battery and a float charger. Very handy when the power dies.


Nah! You're supposed to use Anderson PowerPole connectors. Get with the
program.

"Perce"
(aka Alan NV8A)

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  #16 (permalink)  
Old 10-06-2006, 04:50 PM
Jeff Liebermann
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

"Percival P. Cassidy" <nobody@notmyISP.net> hath wroth:

>On 10/05/06 06:48 pm Jeff Liebermann wrote:
>> I have an "octupus" with a bunch of power plugs going to a 0.093 Molex
>> 2 pin connector for 12VDC. That takes care of everything that runs on
>> 12VDC (DSL modem, router, wireless, switch). The 12V comes from a big
>> gel cell battery and a float charger. Very handy when the power dies.


>Nah! You're supposed to use Anderson PowerPole connectors. Get with the
>program.
>"Perce"
>(aka Alan NV8A)


Sure. All I have to do is replace about 100+ assorted power cables,
pigtails, panel connetors, and power jacks.
http://www.qsl.net/w2vtm/emcomm_molex_conn.html
http://www.qsl.net/ab0mv/molex.htm
The Molex connectors are cheap, survive tripping over the power cord,
impossible to plug in backwards, and can be found at Radio Shock in an
emergency. I also bought the overpriced crimping, insertion, and
removeal tools, and I'm not buying yet another set. The few Anderson
Power Pole pigtails and power adapters that I own evaporated after
Field Day.

Here's a rant on the subject:
http://www.wc-ares.org/molex_vs_power_pole.html

Just don't ask how much current I run through the Molex connectors.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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  #17 (permalink)  
Old 10-06-2006, 05:08 PM
Jeff Liebermann
Guest
 
Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

"Percival P. Cassidy" <nobody@notmyISP.net> hath wroth:

>On 10/04/06 11:50 pm Jeff Liebermann wrote:
>
>> Yep. The original v1.x WRT54G routers used 5V 2A(?) power supplies.
>> They were junk. I've lost 2 or 3 of them at various locations. Later
>> revisions use 12V 1A power supplies which had a better survival
>> record.


>My ver. 1.0 WRT54G with 5v 2A p/s has been going for at least 3 years
>(it was unused for a couple of years because I thought it was toast, but
>it worked fine after a full reset and is now operating as an Access Point).
>Perce


I'm fairly sure that the failures I've seen are the result of AC power
glitches. Two recent failures were at local businesses immediately
following a power glitch. The third was dragged in later by a friend
that might have been caused by the same glitch. Strangely, I've seen
other 5VDC wall warts die that were attached to other hardware
(Netgear switches, no-name hubs, fax-modem switch, Digi serial mux,
etc). Most are switching supplies. The higher voltage wall warts
seem to survive much better, but that's based on a very limited
sampling. I did to an autopsy on one of the 5V 2.5A Netgear supplied
switchers and found the active devices to be blown, and not the usual
defective low-ESR electrolytic cazapitor failures. After a few
creative substitutions, accompanied by and some smog and sparks, I got
the clue and gave up trying to fix it.

Congrats on yours working, but I suggest you buy a spare in
preparation for its inevitable demise. However, I'm not sure whether
the V1.0 WRT54G can handle the wide range of power supply voltages.
http://www.linksysinfo.org/portal/fo...ad.php?t=47124
If you're going to substitute, start with a variable voltage power
supply and measure the current consumption. If the supply current
goes DOWN with increasing voltage, the switcher is working. If it
tries to go up, pull the plug and give up immediately.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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  #18 (permalink)  
Old 10-06-2006, 05:43 PM
HotRod
Guest
 
Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

One of the power supplies was even plugged into an APC power protector and
buckup unit. It should have been fine "SHOULD"



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  #19 (permalink)  
Old 10-06-2006, 11:19 PM
JIMMIEDEE123@YAHOO.COM
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Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?


Jeff Liebermann wrote:
> "HotRod" <NoSpam@YourEmail.com> hath wroth:
>
> > I have two Linksys WRT54G V1.? wireless routers that are designed to run
> >on 5V DC.

>
> Actually, the WRT54G/GS will run on anything between 3.7VDC and about
> 18VDC. The internal switching regulator has a very wide input voltage
> range. For my WRT54G v1.1:
> Volts Amps
> 15 0.25
> 12 0.3
> 5 0.8
> 4 1.0
>
>

When the power supply to my router went bad I cut the cord off the wall
wart and connected it to my 12 volt bus on my bench power supply. I
meant to connect it to the 5 volt but it worked fine on 12. Will all
the linksys equipment operate off of 12VDC like this.


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  #20 (permalink)  
Old 10-07-2006, 12:28 AM
Jeff Liebermann
Guest
 
Posts: n/a
Default Re: Linksys WRT54G Power issues Have you ever had this?

JIMMIEDEE123@YAHOO.COM hath wroth:

>Jeff Liebermann wrote:
>> Actually, the WRT54G/GS will run on anything between 3.7VDC and about
>> 18VDC. The internal switching regulator has a very wide input voltage
>> range. For my WRT54G v1.1:
>> Volts Amps
>> 15 0.25
>> 12 0.3
>> 5 0.8
>> 4 1.0


>When the power supply to my router went bad I cut the cord off the wall
>wart and connected it to my 12 volt bus on my bench power supply. I
>meant to connect it to the 5 volt but it worked fine on 12. Will all
>the linksys equipment operate off of 12VDC like this.


The WRT54G/GS and BEFW11S4 will work on anything between 3.7V and
18VDC. 12V or 13.6VDC is fine. There may be other models that also
have wide range switchers inside, but I haven't tested them.

BEFSR41 v4 running just fine on 3.5VDC.
http://802.11junk.com/jeffl/pics/dri.../low-volt.html

WRT54G v1.0 and 1.1 came with 5V power supplies, but later hardware
revisions arrived with 12V 1A supplies. I know for sure that v1.1
will run off 12V but I haven't tested v1.0. Per my previous warning,
try v1.0 with an adjustable power supply first. If the current
decreases with increasing voltage, it's working. If the current tries
to increase when the voltage is increasing, pull the plug and run it
on the original 5VDC.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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  #21 (permalink)  
Old 03-17-2010, 07:41 AM
Junior Member
 
Join Date: Mar 2010
Posts: 2
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Bump, bump, bump (one bump per year, and 3 years old thread?)...

The WRT54G version 1.0 is quite specific, and unique vs. the WRT54G V2+ (I can't speak to the V1.1). The V1.0 requires 5 VDC specifically, and my original (and defective) power supply (wall wart) was 2.5A.

I acquired (dumbly, I paid for) a defective V1.0, assuming that 'defective' meant needing JTAG'd. So...now I learn about the circuit that is v1.0.

In checking, it appears the power supply on my device fried, then the previous owner must have tried another power adapter which, I assume, was either of higher voltage, or, of not enough current, resulting in damage to the backend power circuitry.

The good news? Most of the WRT54G v1.0's chips never see the incoming 5.0 VDC. There's a watchdog circuit (with very limited regulating abilities), and a dual FET, and lastly (per my research), a second voltage regulator (likely to ensure stable voltage into the mini-PCI card (another unique-ness of the v1.0 vs. all other WRT54Gx to my understanding). The watchdog chip is picky, and will accept no more than about 6~7 volts input, then it fries.

Newer models of WRT54G (v2+, at least), according to my readings, have a built in regulator circuit which can take at least up to 20 VDC. The higher the voltage, the lower the required current (amps)(and yes, techies, that's thanks to PIE).

So, be sure to check that replacement power supply you're considering using on a WRT54G v1.0, both that voltage output is 5.0 VDC (not 6, not 4), and, that you've got - to match the original, it outputs AT LEAST 2.5 Amps (or 2500 mA).

I know it's a dinosaur, but I like classic cars, too!
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