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-throu... 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 _______________________________________________ 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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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 ;) 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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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

<-- 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? ;) 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 2017-07-12 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 .... https://www.thingiverse.com/thing:2286741

<-- 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/B071... 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.

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 ;) 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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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:

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-ban k-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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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 -- 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 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

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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 :).

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