[Commotion-dev] TP-Link WDR4300 with more than 12V power supply

[Danny Iland]

Hi Andy,

I have been running a WDR4300 off unregulated 12V battery power for about a
month, with no problems so far.

Two setups that work fine for me:

1. Connect directly to a car cigarette lighter output with one of these
<http://www.amazon.com/Tenq%C2%AE-Baofeng-Bf-uv-5r-12v-Charger/dp/B00DOR7CBG/>
(or
similar with standard 2.1x5.5mm barrel plug). Voltage is around 12v with
engine off, 14v with engine running. I tend to only use it while engine is
running.

2. Connect to the load output of a solar charge controller connected to a
12V battery. To answer Andy's question off-list, It's not connected
directly to the battery, but connected to a bus bar which is connected to
the charge controller which is connected to the battery. Battery voltage
peaks around 13.5V.

Danny

On Tue, Apr 14, 2015 at 11:34 AM, Andy Gunn <andygunn at opentechinstitute.org>
wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi everyone - I had a discussion with someone as to whether the
> TP-Link WDR4300 routers could run at a higher voltage than the 12 volt
> power supplies they are shipped with. I have done a bit of research
> and testing, but also wanted to hear if anyone else has done some
> experimenting.
>
> The reason for this is to run the router on a backup battery power
> source, to keep things running when the utility electricity shuts off.
> If a charger is left attached to the backup battery, it can keep the
> battery charged and won't require messing with the cables. The only
> issue is that many batteries charge at higher voltages - 13.8 volts or
> higher.
>
> - From my initial inspection of the DC-to-DC converters on the board of
> the WDR4300, most have tolerances that go up to 18 or 20 volts. So, I
> decided to test things with a 15 volt power supply. I am using an
> older Ubiquiti PoE power brick and an adapter to supply the TP-Link. I
> measured the output of the PoE adapter at 15.4 volts, so high enough
> that it gives a bit of margin of error on battery chargers.
>
> So far - so good. The TP-Link is running just fine, it can handle
> connections and doesn't appear to have any issues, or be running any
> warmer than usual. So - initial success.
>
> I will keep it running for a few days just to see if any issues
> appear, and I will report back if anything goes awry. If anyone else
> has done any similar testing, let us know!
>
> Thanks,
> - -Andy
>
>
> - --
> Andy Gunn, Field Engineer
> Open Technology Institute, New America
> andygunn at opentechinstitute.org | 202-596-3484
> PGP: F1D2 CD5E 9F15 EEB0 232A 1EFA EEDC DC5C F1D5 653C
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v2.0.22 (GNU/Linux)
>
> iQEcBAEBAgAGBQJVLV3KAAoJEO7c3Fzx1WU81csH+wXdLKQ5MvSx+Zz85Sodh29/
> tOfehtqbPOH7MhgRmjF2S5inIHDSt7Iu8VnNCZxwc2xA/1Fa9oD57ELfIU3jSPSA
> a2zKfIG78wBzuesq+2fVouqt1iLbradaryKuw0+uV6m4TLac1Cey7QgzbYRLmOyt
> s1SHLzUsRZspqKUBo9Ik1p+K+ZZUsxnRyfNTSjOhfEYXIpn0S/VGWmyQzDm3eQll
> 3otewJy4nCj2dYvAq4r7AAFb3hHkj3Bvkl2jkSCzpH757YGOTW0TnWpSkrN6g7MV
> iK74CAog1IoTitrvdGPnlu+jz00Bd5ba3jiOanbrZZDOWqjXfdY+e6FMDGjgO2k=
> =OijY
> -----END PGP SIGNATURE-----
> _______________________________________________
> Commotion-dev mailing list
> Commotion-dev at lists.chambana.net
> https://lists.chambana.net/mailman/listinfo/commotion-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.chambana.net/pipermail/commotion-dev/attachments/20150414/cb52ed18/attachment.html>