[aprssig] DC Power Pole to USB for Pi 4 computers

[Patrick]

The big thing with BEC's is that you need to have a supply that handles the
instant load changes, and well filtered output on the 5v so it stays
stable, the pi gets angry if there's any drop and they will ripple many of
the BEC's without added caps.  My typical setup is running off a deep cycle
battery, and the SBEC array (4x20 amp spread across the display) will pop
30 amp input fuses pretty quickly if I try to display a full white screen,
but no issues with the pi 4 lol.

On Wed, Mar 24, 2021 at 9:39 PM Jason KG4WSV <kg4wsv at gmail.com> wrote:

> Pis are notoriously picky about power. Anything advertised to charge a
> phone is suspect.
>
> I tried some cheap RC BEC supplies, pi 3 didn’t like them. A hefty model
> (10A or 20 A is what it claims) caused the pi to complain regularly.
>
> I have used this one
>
> https://www.pololu.com/product/2851
>
> on a pi zero W that’s also powering an RTL-SDR with no problems. Haven’t
> had a chance to try in on anything larger than the zero W yet.  The holes
> allow it to mount to a standard 2 pin header to a pi prototyping hat; the
> Powerpole is on a pigtail ok my prototype. I plan to do a PCB that includes
> the through-hole Powerpole one of these days.
>
> Some prototyping hats (I’m looking at you adafruit) have extremely wimpy
> power traces. I piggybacked an additional wire to the +5 and ground pins to
> eliminate that problem.
>
> For any pi boards with components that are too tall to stack, a quick and
> easy hack is to just stick a second stacking header on there to jack up the
> top board and allow more clearance.
>
> -Jason
> kg4wsv
>
> On Mar 24, 2021, at 3:07 PM, MJ Inabnit <ke6sls at arrl.net> wrote:
>
> 
> Looks like a whole lot of folks are trying to find a nice tidy Power
> Pole power adapter to supply power to Raspberry Pi 4's.  I know there
> are many small companies building neat stuff like mini-APRS rigs.  So is
> anyone building a Power Pole power supply for the Pi's yet?  Any good
> tips or links would be very welcome as I plan to move my APRS and packet
> systems to a new Pi 4 in the near future.  All my gear is using the
> power poles and the rigrunner/MFJ power pole dc distribution boxes.
>
> Thanks all!  73
>
> Jaye ke6sls
>
>
> --
>
> wishing you well
> Jaye, ke6sls--via the toshiba w/thunderchicken
>
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