[App_rpt-users] USB Battery Bank that supports 'Pass Through Charging' and acts as a UPS for Allstar Nodes running on a Pi

Carl carl at n7kuw.com
Mon Jul 10 13:03:05 EDT 2017


I have not used the buck converter linked below, but I have tried using a different buck converter to go from 12V to 5V for the Pi, and found it introduced an excessive amount of noise into the Pi (which carried over into the radio audio). Something to check as you develop your power scheme.
Carl

-----Original Message-----
From: App_rpt-users [mailto:app_rpt-users-bounces at lists.allstarlink.org] On Behalf Of Scott Zimmerman
Sent: Monday, July 10, 2017 9:14 AM
To: Users of Asterisk app_rpt; app_rpt
Subject: Re: [App_rpt-users] USB Battery Bank that supports 'Pass Through Charging' and acts as a UPS for Allstar Nodes running on a Pi

Ramesh,

If it were me, I would use a 7ah 12v backup battery with a "normal" 12v float charger, then use a buck converter to lower the voltage down to 5v. Something like this would do nicely:
http://www.ebay.com/itm/262908222815

Using 12v storage makes things more "standard".

Just my 2c.

Scott

Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Road
Boswell, PA 15531

On 7/10/2017 11:38 AM, Ramesh Dhami wrote:
> Hi Folks:
> 
> Wonder if anyone has a lead on a USB Battery Bank that supports 
> pass-through charging and does NOT interrupt the output voltage when there is loss of commercial power?
> 
> I'd like to use a battery bank on my remote node down in FL (renowned 
> for electrical storms!), so keeping the Pi up during brown-outs and loss of commercial power is a big plus.
> 
> In case folks are interested - here is a link to a good article providing a review of various products:
> 
> http://www.theoutpost.org/6-techy/raspberry-pi-usb-power-bank-ups-pass
> -through/
> 
> Unfortunately, the leading contender, the product from RS Electronics 
> (brings back memories of my "jollies" as an Apprentice heading up to Alum Rock in Birmingham ;) is not available in N. America.  There must be other equivalents out there.....
> 
> Anyone have a lead on such a product?
> 
> Thanks!
> 
> Ramesh, VA3UV
> 
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