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

AllStarLink
1

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 :wink: is not available in N. America. There must be other equivalents out there.....

Anyone have a lead on such a product?

Thanks!

Ramesh, VA3UV

2

Hey!,
Don't pick on Florida, we have enough problems. :wink:

···

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 :wink: is not available in N. America. There must be other equivalents out there.....

Anyone have a lead on such a product?

Thanks!

Ramesh, VA3UV

3

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 :wink: 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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4

I like that…didn’t see the one with the micro usb plug when I bought a box of the other ones with just fly leads 6 months ago.

···

I’d complete it with a good 12v PS, a powergate, nice sealed gel auto battery, and a brace of these to power both the step-down feeding the Pi and the radios.

I guess if you wanted to get fancy, you could wire in a couple coax bypass relays (if you’ve an amplifier after the exciter) controlled by wall current presence to cut the flamethrower out of the circuit and run in degraded mode if you lost mains.

Isn’t this more fun designing?

–
Bryan

Sent from my iPhone 6S…No electrons were harmed in the sending of this message.

On Jul 10, 2017, at 12:13, Scott Zimmerman n3xcc@repeater-builder.com wrote:

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 :wink: is not available in N. America. There must be other equivalents out there…
Anyone have a lead on such a product?
Thanks!
Ramesh, VA3UV

App_rpt-users mailing list
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http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users
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5

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@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 :wink: 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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http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users

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6

OK. so now your Pi is backed up. What about the rest of the network? Is the ethernet swich, cable modem etc etc also on a UPS? No point otherwise.

···

On Mon, Jul 10, 2017 at 1:03 PM, Carl carl@n7kuw.com wrote:

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@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 :wink: is not available in N. America. There must be other equivalents out there…

Anyone have a lead on such a product?

Thanks!

Ramesh, VA3UV

App_rpt-users mailing list

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http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users

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confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.

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7

I've looked at these 13 v devices and always wonder it they will handle the 15 CDC of an auto charging system like all our radios. Some 12 vdc evils will only work properly if the have 12 vdc not 13.8 vdc for example. The information on these devices is lacking. Any insight into to this issue? Just too bad the rest of the electronics world does not have a ham background. Sigh!

Thanks,
Bob
k6ecm
73

···

Sent from my iPhone

On Jul 10, 2017, at 9:13 AM, Scott Zimmerman <n3xcc@repeater-builder.com> wrote:

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 :wink: is not available in N. America. There must be other equivalents out there.....
Anyone have a lead on such a product?
Thanks!
Ramesh, VA3UV
_______________________________________________
App_rpt-users mailing list
App_rpt-users@lists.allstarlink.org
http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users
To unsubscribe from this list please visit http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button"
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To unsubscribe from this list please visit http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button"
You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.

8

I use one of these to power the Pi that runs my 3D printer. It’s wired in to the printer supply. One switch does it all. they are great little gizmo’s. I bought a second one to run the Pi based hotspot in my car - when I get around to it.

Mark

···

On Mon, Jul 10, 2017 at 12:13 PM, Scott Zimmerman n3xcc@repeater-builder.com wrote:

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 :wink: is not available in N. America. There must be other equivalents out there…

Anyone have a lead on such a product?

Thanks!

Ramesh, VA3UV

App_rpt-users mailing list

App_rpt-users@lists.allstarlink.org

http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users

To unsubscribe from this list please visit http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the “Unsubscribe or edit options button”

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9

Tested mine on the shack supply. Works OK at up to 15V. YMMV though.

Mark

···

On Mon, Jul 10, 2017 at 1:11 PM, Bob Pyke k6ecm1@gmail.com wrote:

I’ve looked at these 13 v devices and always wonder it they will handle the 15 CDC of an auto charging system like all our radios. Some 12 vdc evils will only work properly if the have 12 vdc not 13.8 vdc for example. The information on these devices is lacking. Any insight into to this issue? Just too bad the rest of the electronics world does not have a ham background. Sigh!

Thanks,

Bob

k6ecm

73

Sent from my iPhone

On Jul 10, 2017, at 9:13 AM, Scott Zimmerman n3xcc@repeater-builder.com wrote:

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 :wink: is not available in N. America. There must be other equivalents out there…

Anyone have a lead on such a product?

Thanks!

Ramesh, VA3UV

App_rpt-users mailing list

App_rpt-users@lists.allstarlink.org

http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users

To unsubscribe from this list please visit http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the “Unsubscribe or edit options button”

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10

For 5v power, I’ve used one of these with good results:

https://powerwerx.com/usbbuddy-powerpole-usb-converter-device-charger

73

Stephen

K1LNX

···

On Mon, Jul 10, 2017 at 1:12 PM, Mark Phillips g7ltt@g7ltt.com wrote:

Mark

I use one of these to power the Pi that runs my 3D printer. It’s wired in to the printer supply. One switch does it all. they are great little gizmo’s. I bought a second one to run the Pi based hotspot in my car - when I get around to it.

App_rpt-users mailing list

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http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users

To unsubscribe from this list please visit http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the “Unsubscribe or edit options button”

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On Mon, Jul 10, 2017 at 12:13 PM, Scott Zimmerman n3xcc@repeater-builder.com wrote:

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 :wink: is not available in N. America. There must be other equivalents out there…

Anyone have a lead on such a product?

Thanks!

Ramesh, VA3UV

App_rpt-users mailing list

App_rpt-users@lists.allstarlink.org

http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users

To unsubscribe from this list please visit http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the “Unsubscribe or edit options button”

You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.

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11

Sure there is...if you're using asterisk as your repeater controller. OK, no network connectivity would suck, but no repeater would suck more.

···

--
Buddy Brannan, KB5ELV - Erie, PA
Mobile (preferred): (814) 431-0962
Phone: (814) 860-3194
Email: buddy@brannan.name

On Jul 10, 2017, at 1:10 PM, Mark Phillips <g7ltt@g7ltt.com> wrote:

OK. so now your Pi is backed up. What about the rest of the network? Is the ethernet swich, cable modem etc etc also on a UPS? No point otherwise.

On Mon, Jul 10, 2017 at 1:03 PM, Carl <carl@n7kuw.com> wrote:
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@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 :wink: 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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12

That's how I power my piGATE.
12v battery charged via solar with a nearly identical converter w/usb port.

Good luck OP

Chris
KB0WLF

···

-----Original Message-----
From: App_rpt-users [mailto:app_rpt-users-
bounces@lists.allstarlink.org] On Behalf Of Scott Zimmerman
Sent: Monday, July 10, 2017 11:14 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

13

OK I’ll jump in. Check when they go on sale. If they aren’t ask for the sale price. They work great on my MMDVMHost Raspberry Pi and my motorcycle.

https://www.cyclegear.com/accessories/trackside-usb-outlet

David

···

On Mon, Jul 10, 2017 at 10:23 AM, Chris Curtis demoman@rollanet.org wrote:

That’s how I power my piGATE.

12v battery charged via solar with a nearly identical converter w/usb port.

Good luck OP

Chris

KB0WLF

-----Original Message-----

From: App_rpt-users [mailto:app_rpt-users-

bounces@lists.allstarlink.org] On Behalf Of Scott Zimmerman

Sent: Monday, July 10, 2017 11:14 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

App_rpt-users mailing list

App_rpt-users@lists.allstarlink.org

http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users

To unsubscribe from this list please visit http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the “Unsubscribe or edit options button”

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–

Thanks, David

“Laws that forbid the carrying of arms…disarm only those who are neither inclined nor determined to commit crimes. Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than prevent homicides, for an unarmed man may be attacked with greater confidence than an armed one.”

Thomas Jefferson

14

<-- Hi Carl: Absolutely, I have some of those converters from "CPT" and just as you describe, I found them to induce noise into the Pi / fob, which then get into the audio stream. Not good!

My original plan was to use the Battery Bank (dual USB output) to power both the Pi and my Baofeng BF888s... but, in doing so, I get a humm on the TX audio out of the Baofeng. When I move the Baofeng's over to a separate wallwart / USB charger, the noise goes away.

To Mark's question (Gee, where did you crawl out from? :wink: keeping the Pi up during a power blip, etc., eliminates the need for someone to go to site to recycle power to the Pi. Everything else, losing power, isn't such a big issue... just trying to keep the Pi somewhat immune to power blips.

Cheers!

Ramesh.

···

On 2017-07-10 1:03 PM, Carl wrote:

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

15

This thread has been useful for some other projects I have going at the moment. I think the “proper” way to do this is to power the Pi from a 12V source and a buck converter. There are any number of 12V pwrgate doo-dads that you could make to handle the UPS side. I found this on Thingiverse that is not only a Pi case but also has a buck convertor too … https://www.thingiverse.com/thing:2286741

I think this is the way I’m going to go for my node rebuild. I’m going to do this Pi setup and one of these http://www.repeater-builder.com/products/usb-rim-lite.html for a spare Motorola SM50 down at the farm. It’ll be solar powered with a WiFi connection back to the office. The whole lot will be mounted on some 3/4 plywood on the barn wall. I’m building one of those 18650 Tesla type battery packs to store the power. Should get about a week of run time just on the batteries.

Hello, Ramesh. Sorry I’ve been out of touch lately. I moved to Delaware 2 years ago after the wife threw me out. Been busy getting divorced and all that goes with that. Good news is that I have sole custody of my kids now and that things are starting to level out.

···

On Mon, Jul 10, 2017 at 3:56 PM, Ramesh Dhami Ramesh@va3uv.com wrote:

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

On 2017-07-10 1:03 PM, Carl wrote:

← Hi Carl: Absolutely, I have some of those converters from “CPT” and just as you describe, I found them to induce noise into the Pi / fob, which then get into the audio stream. Not good!

My original plan was to use the Battery Bank (dual USB output) to power both the Pi and my Baofeng BF888s… but, in doing so, I get a humm on the TX audio out of the Baofeng. When I move the Baofeng’s over to a separate wallwart / USB charger, the noise goes away.

To Mark’s question (Gee, where did you crawl out from? :wink: keeping the Pi up during a power blip, etc., eliminates the need for someone to go to site to recycle power to the Pi. Everything else, losing power, isn’t such a big issue… just trying to keep the Pi somewhat immune to power blips.

Cheers!

Ramesh.

App_rpt-users mailing list

App_rpt-users@lists.allstarlink.org

http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users

To unsubscribe from this list please visit http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of the page. Enter your email address and press the “Unsubscribe or edit options button”

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16

<-- Hi Mark: Yeh using a battery and a 'buck converter' is definitely an option. As I mentioned to Carl the 'CPT' branded converters that I have, are "noisy" they inject audio back into the audio path of the fob, so the audio into the network as well as audio out on your transmitter has an annoying high pitch whine.

In my case, since I intend to install this stuff thousands of miles away, I don't want a battery down there, left unattended. A quick search on Amazon, revealed one of these:

https://www.amazon.com/Kaito-KA-723-Portable-Pass-Through-Compatible/dp/B07171VXHP/ref=sr_1_1?s=wireless&ie=UTF8&qid=1499741035&sr=1-1&keywords=usb+battery+pack+with+pass+through+charging

It supports 'pass through charging' - but does not mention anything about seamless switch-over from AC power to battery power. Of course, some surgery and an electrolytic cap across the output may help during short 'brown-outs'

Good to hear from you... catch me on 27919 sometime!

Cheers,

Ramesh.

···

On 2017-07-12 11:51 AM, Mark Phillips wrote:

This thread has been useful for some other projects I have going at the moment. I think the "proper" way to do this is to power the Pi from a 12V source and a buck converter. There are any number of 12V pwrgate doo-dads that you could make to handle the UPS side. I found this on Thingiverse that is not only a Pi case but also has a buck convertor too .... Thingiverse - Digital Designs for Physical Objects

17

<-- An update to my own post :wink: - I came across this site describing exactly what I was looking for: Ravpower the ultimate UPS

I purchased the RAVPower 16,750mAh model from Amazon. It has 2 USB ports as shown. What I can say is that the 2.4A output does suffer from momentary power loss upon loss of commercial power. HOWEVER, the 2.1A output DOES NOT .... it stays ON and thus is an ideal "UPS" for the Pi (and other USB powered devices).

As Mark, G7LTT / NI2O pointed out previously, of course to be absolutely solid, you'd have to have your entire network on a UPS, etc. However, that's not my intention here. I just want to prevent the Pi from getting confused during power blips / minimize the chances of SD card corruption, etc., since this system is going to a remote location down in FL :).

Oh BTW - another tip - came across this power bar (a really inexpensive alternative to the IP-9255/9258 series):

https://www.amazon.com/Mengyasi-Outlets-Charging-Control-Tablets/dp/B07216SSZY/ref=pd_lpo_vtph_60_tr_t_3?_encoding=UTF8&psc=1&refRID=K1TKYBMRM3JRKX29X4AD

Individual control of the AC outlets ... but the USB devices are ganged together, meaning that they are up or down - but the good thing is that you can cycle them (even if it does mean all at once). Of course, you can use a 120V / USB charger and plug it into an AC outlet for individual control too.

Cheers!

Ramesh, VA3UV
27919 / 29109

···

On 2017-07-10 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 :wink: is not available in N. America. There must be other equivalents out there.....

Anyone have a lead on such a product?

Thanks!

18

Have you considered a device designed for this purpose, like this?

http://www.pimodulescart.com/shop/item.aspx?itemid=30

A number of locals here have repeater controllers running these and
recommend them for that purpose.

Tom KD7LXL

···

On Wed, Aug 9, 2017 at 5:03 AM, Ramesh Dhami <Ramesh@va3uv.com> wrote:

I just want to prevent the Pi from getting confused
during power blips / minimize the chances of SD card corruption, etc., since
this system is going to a remote location down in FL :).