Date   

Re: 5V power supplies #hampi

Michael WA7SKG
 

I found a wonderful device called the MoPi 2 HotSwap mobile power supply. It is a hat for the RPi that has a number of neat features. It has two inputs of 6.5-24VDC. Each input is configurable as to power source. There is also a charging input to charge a battery. The idea is to connect a power supply to one input and a battery to the other. If the main power drops, the battery instantly takes over. If the power source starts dropping to a preset level, it will cleanly shut down the RPi. There is an ON/OFF switch for cleanly starting and shutting down the RPi. There is a 5v switched output to control an external device.

In my case, I use this with a TNC-Pi for APRS. The pushbutton lets me fire it up and the switched output controls a relay that turns on the radio. The primary input is the vehicle 12V and the backup is a small battery. The charge input is from a dashtop solar panel. If the vehicle battery goes below about 10 volts, it switches to the backup. If the backup goes below 10 volts, it shuts the whole thing down cleanly.

Very slick device.

Michael WA7SKG


Charles Albert wrote on 11/17/20 2:12 PM:

When a power supply is/is not 5V:  Guys, I have experienced the following error on my 3B+ machines- - Low Voltage Warning, check power supply- -when using power supplies 5V, 2.5A.  2 of my 3B+s have given that warning. Also, the video degrades when watching live video.  I have worked with power supplies on the zero w, 3B+ and 4B machines. The 5V, 2.4 A supply is OK with the zero w.  I obtained a few 5.25V, 3A supplies and the 3B+s work perfectly each time. Note, that on the input of the pis, there is a zener and a 47uF capacitor, no other conditioning or regulating. When the 3B+ has both USB ports loaded with the mouse and keyboard, a HDMI port sending video and audio to the monitor, in this case either a 7" or 12" monitor, and the LAN cable connected to a Netgear router/switch; there is a load on the power supply in addition to the machine itself.  After studying the effects of the power supplies on the 3B+, I have come to the conclusion that for optimal operation of a fully loaded 3B+, use NOTHING other than a 5.25V, 3A power supply. Interestingly, the Canakit 5.1V, 3A supply which came with the 4B works perfectly with the 4B.  that other 0.1V obviously helps with the 4B. I wouldn't think about putting the 4B on a 5V supply.  So tolerances matter. I hope this is usable info for y'all, 73 Charles A. KK4AC, incidentally, the 5.25V 3A supplies can be had from Amazon for about $11.00
_._,_._,_
-----------------------------------------


Re: Hey everyone!

Charles Rich AK4SR
 

You have to wonder what "she" would be gaining by spamming this topic, though. I agree it looks like a spambot, but maybe it's just someone's idea of an efficient way to contact the most people about learning about the Raspberry Pi. Kind of fishing for mentors. Although in a ham radio group that's like fishing with dynamite. You will get lots of replies ;-)  
--
Charles Rich
AK4SR
https://stemhamradio.net
https://www.facebook.com/groups/1460319574150873/


Re: 5V power supplies #hampi

Larry Macionski
 

Here are my experiences with about 7-9 RPI's... Note I have never used a RPI4 yet.
Plug in the wall "wall warts" I believe the best quality  for the money:
 VILROS.COM--- Their power supplies have an in-line power -ON-OFF switch and a ferrite bead.
NOT for RPI4- https://vilros.com/collections/raspberry-pi-accessories/products/2-5a-micro-usb-power-supply-on-off-switch
ONLY RPI4/400- https://vilros.com/collections/raspberry-pi-accessories/products/vilros-usb-c-5v-3a-power-supply-with-switch-designed-for-pi-4
NOTE- VIRLOS.COM has FREE SHIPPING on these.. I have ordered 2 only and they shipped. They are in NJ. I am in KS and I get in 2 days. You East Coasters should do better.

For HAM RADIO GO BOX 12V in and a USB out. I have used these for 3-4 months now. One is in 24x7 repeater operation with ALLSTAR. Simply foam taped to a chassis.
https://www.amazon.com/gp/product/B01HXU1C6U/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1
Priced VERY Right...

Regards,

Larry W8LM


Re: Hey everyone!

Michael WA7SKG
 

"She" is a spambot. I found a number of messages, all almost identical, of her joining a bunch of groups. One of the reasons I set "New Member Moderation" on all the groups I manage.

Moderators may want to attend to this.

Michael WA7SKG

John N8JJO wrote on 11/18/20 5:07 AM:

"Barbara" seems to be appearing on a number of groups.


Re: HamPi on Raspberry Pi 400

 

I took my Pi 4 SD card out and put it in the Pi 400 and booted right up. I did apt update and upgrade and loaded latest firmware. 

I haven't tried the Ham Pi image on it, but don't foresee any problems. 

On Wed, Nov 18, 2020, 08:01 <john.chubick@...> wrote:
Has anyone tried running HamPi on the new Raspberry Pi 400? I have one on the way so I'll be trying it out. Just wondered if any of you already have. I know the 400 is much like the Pi 4 but I have heard "not exactly" in terms of OS support.

Cheers, 
John - KB9LNS


HamPi on Raspberry Pi 400

John Chubick
 

Has anyone tried running HamPi on the new Raspberry Pi 400? I have one on the way so I'll be trying it out. Just wondered if any of you already have. I know the 400 is much like the Pi 4 but I have heard "not exactly" in terms of OS support.

Cheers, 
John - KB9LNS


Re: 5V power supplies #hampi

jerry.wade01@...
 

Can you send a link for the exact UBEC you are using?



On Wed, Nov 18, 2020 at 9:32 AM <dkc2030@...> wrote:
I started using a UBEC to power my Pi systems from 12 VDC that is used for my radio equipment.  UBEC stands for Universal Battery Eliminator Circuit.  These are made for the RC hobby to take a higher battery voltage and regulate it down to either 5V or 6V (actually 5.3 VDC).  Since they are in aircraft they have to be RF quiet or you could lose control of the aircraft.  There are some that have a ferrite toroid included and sell for $6-8 on Amazon.  Make sure you set it up for 5 VDC.  There is a connector on the output that will mate with the bus on Pis - be really sure you get the polarity correct or GOODBYE PI

John mentioned the DRAWS hat.  In addition to providing power it has a GPS on board and two connections to radios.  Check them out at NW Digital.


Re: 5V power supplies #hampi

dkc2030@...
 

I started using a UBEC to power my Pi systems from 12 VDC that is used for my radio equipment.  UBEC stands for Universal Battery Eliminator Circuit.  These are made for the RC hobby to take a higher battery voltage and regulate it down to either 5V or 6V (actually 5.3 VDC).  Since they are in aircraft they have to be RF quiet or you could lose control of the aircraft.  There are some that have a ferrite toroid included and sell for $6-8 on Amazon.  Make sure you set it up for 5 VDC.  There is a connector on the output that will mate with the bus on Pis - be really sure you get the polarity correct or GOODBYE PI

John mentioned the DRAWS hat.  In addition to providing power it has a GPS on board and two connections to radios.  Check them out at NW Digital.


Re: Hey everyone!

John N8JJO
 

"Barbara" seems to be appearing on a number of groups.


Re: Hey everyone!

Jason A. Powell <jason.powell.us@...>
 

Welcome to Linux, Barbara!

If I can ever help you (or anyone else in this list) with command-line stuff, feel free to ping me!

(I’ve been doing UNIX professionally for 20+ years, and there are probably scores of others on this list with just as much experience.)

Jason
KD8FMR

On Tue, Nov 17, 2020 at 23:24 <barbaradavison935@...> wrote:

Hey everyone!


My name is Barbara and I’m relatively new with the Raspberry Pi. Looking forward to learning more about it so please feel free to message me :)


Thanks!


Hey everyone!

barbaradavison935@...
 

Hey everyone!


My name is Barbara and I’m relatively new with the Raspberry Pi. Looking forward to learning more about it so please feel free to message me :)


Thanks!


Re: 5V power supplies #hampi

 

Good info.

Also consider lead length and gauge -- too many folks grab random supplies that are just not up to the load.

Many of my Pis for Amateur Radio have a radio interface HAT (DRAWS™) with a built in 9-15VDC to 5.1 VDC supply and feed the 5V to the 5V rail via the GPIO. This eliminates some of these issues.

On Tue, Nov 17, 2020 at 2:12 PM Charles Albert <mrcwa2@...> wrote:
When a power supply is/is not 5V:  Guys, I have experienced the following error on my 3B+ machines- - Low Voltage Warning, check power supply- -when using power supplies 5V, 2.5A.  2 of my 3B+s have given that warning. Also, the video degrades when watching live video.  I have worked with power supplies on the zero w, 3B+ and 4B machines. The 5V, 2.4 A supply is OK with the zero w.  I obtained a few 5.25V, 3A supplies and the 3B+s work perfectly each time. Note, that on the input of the pis, there is a zener and a 47uF capacitor, no other conditioning or regulating. When the 3B+ has both USB ports loaded with the mouse and keyboard, a HDMI port sending video and audio to the monitor, in this case either a 7" or 12" monitor, and the LAN cable connected to a Netgear router/switch; there is a load on the power supply in addition to the machine itself.  After studying the effects of the power supplies on the 3B+, I have come to the conclusion that for optimal operation of a fully loaded 3B+, use NOTHING other than a 5.25V, 3A power supply. Interestingly, the Canakit 5.1V, 3A supply which came with the 4B works perfectly with the 4B.  that other 0.1V obviously helps with the 4B. I wouldn't think about putting the 4B on a 5V supply.  So tolerances matter. I hope this is usable info for y'all, 73 Charles A. KK4AC, incidentally, the 5.25V 3A supplies can be had from Amazon for about $11.00



--
John D. Hays
Kingston, WA
K7VE

 


5V power supplies #hampi

Charles Albert
 

When a power supply is/is not 5V:  Guys, I have experienced the following error on my 3B+ machines- - Low Voltage Warning, check power supply- -when using power supplies 5V, 2.5A.  2 of my 3B+s have given that warning. Also, the video degrades when watching live video.  I have worked with power supplies on the zero w, 3B+ and 4B machines. The 5V, 2.4 A supply is OK with the zero w.  I obtained a few 5.25V, 3A supplies and the 3B+s work perfectly each time. Note, that on the input of the pis, there is a zener and a 47uF capacitor, no other conditioning or regulating. When the 3B+ has both USB ports loaded with the mouse and keyboard, a HDMI port sending video and audio to the monitor, in this case either a 7" or 12" monitor, and the LAN cable connected to a Netgear router/switch; there is a load on the power supply in addition to the machine itself.  After studying the effects of the power supplies on the 3B+, I have come to the conclusion that for optimal operation of a fully loaded 3B+, use NOTHING other than a 5.25V, 3A power supply. Interestingly, the Canakit 5.1V, 3A supply which came with the 4B works perfectly with the 4B.  that other 0.1V obviously helps with the 4B. I wouldn't think about putting the 4B on a 5V supply.  So tolerances matter. I hope this is usable info for y'all, 73 Charles A. KK4AC, incidentally, the 5.25V 3A supplies can be had from Amazon for about $11.00


Re: cgps? xgps?

Bill Cherepy <jcherepy@...>
 

Thanks very much for all of the replies, folks.

Bill WB4WTN

John D Hays - K7VE wrote on 11/15/20 7:23 PM:

apt install gpsd gpsd-clients

On Sun, Nov 15, 2020, 16:03 Bill Cherepy <jcherepy@...> wrote:
I'm thinking of playing with a GPS on my Pi and I've seen and read references to cgps and xgps, but I can't find if these are apps or services or what. Can anyone help?

--
Sent from Postbox


Re: cgps? xgps?

 

apt install gpsd gpsd-clients


On Sun, Nov 15, 2020, 16:03 Bill Cherepy <jcherepy@...> wrote:
I'm thinking of playing with a GPS on my Pi and I've seen and read references to cgps and xgps, but I can't find if these are apps or services or what. Can anyone help?


Re: cgps? xgps?

Ray Wells
 



On 16/11/20 10:51 am, Bill Cherepy wrote:
I'm thinking of playing with a GPS on my Pi and I've seen and read references to cgps and xgps, but I can't find if these are apps or services or what. Can anyone help?

They're in the package gpsd-clients but be warned, the version in Buster is broken. However the version in backports is ok. If you search gpsd-clients buster backports you should find a howto for getting/installing. This will get you pointed in essentially the right direction. https://www.satsignal.eu/raspberry-pi/UpdatingGPSD.html

Ray vk2tv


Re: cgps? xgps?

KN6FOA
 

They come with one of the gps packages (service).  CGPS is a console GPS program and XGPS is an x-interface (UI-based) gps program.


cgps? xgps?

Bill Cherepy <jcherepy@...>
 

I'm thinking of playing with a GPS on my Pi and I've seen and read references to cgps and xgps, but I can't find if these are apps or services or what. Can anyone help?


Re: New Member with questions

Jason A. Powell <jason.powell.us@...>
 

Your 7" display will really limit you, unfortunately. Its native resolution is only 800 x 480, whereas most modern displays are closer to full HD (1920x1080).

Jason
KD8FMR

On Wed, Nov 11, 2020 at 3:34 PM Adam Karsin <kg4wwh@...> wrote:
Good morning,
      my current setup is:
Xiegu G90
Signalink USB
RPi 3 B+ running Ham-Pi
   the RPi is set in a Smarti Pi Touch 7" display with a small mouse and keyboard.

The ultimate goal is to have this all in a small pelican case as a "go-kit", but I definitely need to work out the bugs.

The Ham-Pi is a loaded image with more ham radio applications than I will ever use... But it also comes highly recommended.

My first and most aggravating issue is the screen size of a program. for example, i open WSJT-X and the program screen is huge!! (see attachment). it is the same with most of the programs. i SUSPECT it is a resolution setting, but i am BRAND NEW to RPi and Linux. i really am (unfortunately) a GUI point and click guy, but that is because i have never learned anything else.

from there I am having minor issues getting some of the configuration in place, such as in WSJT what is the signalink called? there are over a dozen possible audio inputs and the same for outputs.... i havent really jumped into that part as i cant even see most of the screen, so it really doesn't matter yet....


thanks for any insight!

Adam


Re: New Member with questions

Mark Griffith
 

Anyone what?

Mark 
KD0QYN 



On Sun, Nov 15, 2020 at 5:16 PM, Adam Karsin
<kg4wwh@...> wrote:
Anyone? 

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