I noted that the 2 GB RPi would use swap space when an external HDMI monitor is used in addition to the 7" touch screen.? This was as reported using htop.? This did not happen when I switched to the 4 GB RPi.? To me, this indicates a performance improvement, as the system does not have to spend time doing external memory management.? I did not see a similar issue with the 4 GB RPi, even when running third-party applications.? Both of these were with the 32-bit version of sbitx.
I had an 8 GB RPi in my DE that I swapped out for a 4 GB.? I did not see a performance hit with the change.
73
Evan
AC9TU
|
@JJ - I originally bought an 8gb pi when I first ordered my sbitx.? Just after I ordered my pi, the sBitx got updated from v2 to v3, so I didn't have a need for the 8gb pi as the v3 came with one installed.? I have purchased the low noise 5v power supply talked
about in other conversations so I had planned to change out the supply and the pi at the same time.? I've been holding off a bit as I wanted the 64bit project to be a bit more stable before I committed to that.? So as soon as the next update to the 64bit version
goes up, I'll pop in the 8gb and let you know how it goes.? But I'm not really sure that there's a way to quantify the performance inprovement (if any).? If there's any thoughts there let me know so I can test the current baseline.
toggle quoted message
Show quoted text
?
On Tue, Apr 2, 2024 at 11:04 PM, <Yo8rc@...> wrote:
Used now a raspberry pi 4b 4gb!thanks
The great Pi shortage resulted in 8GB models to be astronomically priced at the time. I wasn't able to find one for a normal price or in stock.. I'd like to see if someone is using an 8GB Pi and report it's performance.
-JJ
|
Re: Updating a V2 to V3 finals and need info
On Wed, Apr 3, 2024 at 05:10 AM, Jens wrote:
.. what means :? HV voltage ??
?
HV is a label on the schematic. It is the output of the voltage doubler used to reverse bias the PIN diodes in the LPF and T/R switches. HV stands for High Voltage. 73 Evan AC9TU
|
Touchscreen Long Touch for Right Click?
I've been all over the Raspberry Pi groups trying to get long touch to work as a right click.? Has anyone had success getting this working by chance??
Jared
|
Re: Updating a V2 to V3 finals and need info
toggle quoted message
Show quoted text
From: Ashhar
Farhan
Sent: Wednesday, April 3, 2024 1:45 PM
Subject: Re: [BITX20] Updating a V2 to V3 finals and need
info
?
See this?
?
On Sat, Mar 30, 2024, 11:09 PM Jens
<hb9joi@...> wrote:
... can not open the link.
?
From: Ashhar
Farhan
Sent: Saturday, March 30, 2024 6:02 PM
Subject: Re: [BITX20] Updating a V2 to V3 finals and need
info
?
?
On Sat, Mar 30, 2024, 10:22 PM Evan Hand <elhandjr@...> wrote:
Hi
Jens,
Two things come to mind, both around the LPF selection
circuits.
1 - There is diode failure such that only one LPF is
selected
2 - The HV generating circuit has a failure like Gordon Gibby
had.
First, verify the proper operation of the LPF selection changing
frequency in receive mode. Then, verify that the correct filter is
selected.
If receiving works, verify that the HV voltage is higher
than the peak voltage of the output. For 40 watts into 50 ohms, Vpeak =
Squartroot(2*50*power) = 63.4 volts.
Be sure to do all tests with a
dummy load connected.
73
Evan
AC9TU
|
Running with a non-RPi device in an sBitx introduces an additional variable if/when you have problems with the radio.
We are not (yet) at the point where we can drop an RPi 5 in an sBitx, there are OS differences and thermal differences as well. These issues will likely be overcome soon, but I don't think we're there yet.
If contemplating upgrading an sBitx that already has an RPi 4 2 gig in it, you may benefit from an upgrade to a 4 gig RPi 4, but if you're going to swap out the current RPi 2 gig, I'd encourage you to invest another $20 and upgrade to an 8 Gig RPi 4, assuming the $20 price difference isn't an issue for you (but if you're price-sensitive, why are you upgrading?).
Back during and after Covid for a while it was hard to find an RPi for reasonable prices, now the market has normalized, and my local retailer has RPi 4 1, 2, 4, and 8 Gig models as well as RPi 5 4 and 8 Gig models in stock at list prices (Microcenter, specifically their Dallas store), so I'm hard-pressed to justify upgrading to anything other than 8 Gog RPi 4 if you plan to upgrade.
Something made you consider upgrading the RPi 4 in your radio, what was the motivation, and would more memory help address the issue? In my opinion the cost isn't an issue, assuming you can find a use for the removed RPi 4 2 Gig...
toggle quoted message
Show quoted text
On Apr 3, 2024, at 11:26, david todd via groups.io <ac9xh@...> wrote:
?My Bad . it says raspberry Pi 3 compatible,. not sure of PI 4 but it runs alot of different OS..Been trying it out on my mini setup and running some digital on it. there are others that have more memory for a little bit more.Not sure on the touch screen thing though. I quit the PI usage after the prices went bonkers.
Key Features:
- Quad-Core 64-bit ARMv8 Cortex-A53 CPU with NEON and Crypto Extensions
- Penta-Core ARM Mali-450 MP3 GPU with OpenGL ES 2.0 @ 750MHz
- 2GB of DDR3-2133 SDRAM on 32-bit Bus for up to 69Gb/s Unified Memory Bandwidth
- Multi-Plane Multi-Format 2.5D Programmable Pipeline Display Engine with HDMI 2.0 Output
- 4K Ultra-HD High Dynamic Range Video Decode Engine with Hardware Accelerated Decoder for VP9, H.265, H.264
- Form Factor and GPIO Compatibility with Raspberry Pi 3 for Maximum Re-usability
Supported Operating Sytem Images:
- Latest Linux 6.x With Weekly Security Updates
- Ubuntu 22.10 / 22.04 LTS / 20.04 LTS
- Debian 11
- Raspbian 11
- CoreELEC (Kodi)
- LibreELEC (Kodi)
- Android 9.0 Pie
- Armbian
- Lakka (RetroArch/Retro Gaming)
- Batocera (RetroArch/Retro Gaming)
73 David ac9xh
|
My Bad . it says raspberry Pi 3 compatible,. not sure of PI 4 but it runs alot of different OS..Been trying it out on my mini setup and running some digital on it. there are others that have more memory for a little bit more.Not sure on the touch screen thing though. I quit the PI usage after the prices went bonkers.
Key Features:
- Quad-Core 64-bit ARMv8 Cortex-A53 CPU with NEON and Crypto Extensions
- Penta-Core ARM Mali-450 MP3 GPU with OpenGL ES 2.0 @ 750MHz
- 2GB of DDR3-2133 SDRAM on 32-bit Bus for up to 69Gb/s Unified Memory Bandwidth
- Multi-Plane Multi-Format 2.5D Programmable Pipeline Display Engine with HDMI 2.0 Output
- 4K Ultra-HD High Dynamic Range Video Decode Engine with Hardware Accelerated Decoder for VP9, H.265, H.264
- Form Factor and GPIO Compatibility with Raspberry Pi 3 for Maximum Re-usability
Supported Operating Sytem Images:
- Latest Linux 6.x With Weekly Security Updates
- Ubuntu 22.10 / 22.04 LTS / 20.04 LTS
- Debian 11
- Raspbian 11
- CoreELEC (Kodi)
- LibreELEC (Kodi)
- Android 9.0 Pie
- Armbian
- Lakka (RetroArch/Retro Gaming)
- Batocera (RetroArch/Retro Gaming)
73 David ac9xh
|
JJ, I personally quit the raspberry pi fad. I bought an alternative from amazon which does everything for me .
Libre Computer Board AML-S905X-CC (Le Potato) 2GB 64-bit Mini Computer for 4K Media
|
?
?
?
?
?
?
?
?
$35.00
you can run PI os or linux on this one.And if i read right on the specs sheet i have, the pinouts are the same for the PI too.
73
David
ac9xh
|
From an investment point of view I wonder if it is worth upgrading now from a Pi 4 2GB to a Pi 4 4GB($55) with the much faster 4Gb Pi 5($60) in stock available to buy today.?
How long will it be before this Pi 5 mod comes out? The Pi 5 would eliminate the need for an external Real Time Clock dongle.? But, it would probably require a fan, an upgraded buck power supply and a new ribbon cable.
The sBitx has had three versions in the last year...? Which is a good thing!
Upgrading to 4Gb or 8Gb is so tempting.? But, right now my radio still runs very smooth.? So, from an investment standpoint I'm going to wait.? I've got enough extra Raspberry Pi's laying around right now.? I don't know what I would do with the leftover Pi 4 2GB.
|
On Tue, Apr 2, 2024 at 11:04 PM, <Yo8rc@...> wrote:
Used now a raspberry pi 4b 4gb!thanks
The great Pi shortage resulted in 8GB models to be astronomically priced at the time. I wasn't able to find one for a normal price or in stock.. I'd like to see if someone is using an 8GB Pi and report it's performance. -JJ
|
On Wed, Apr 3, 2024 at 03:41 AM, Paul G8KIG wrote:
I am concerned about the use of this config.txt setting to suppress low battery voltage.
I have successfully fed power to several raspberry pis through the GPIO pins and never had to use this setting.
I think there is insufficient regulation to supply the peak current required by the PI.
Even if the warnings are suppressed the Pi will slow its clocks until the power stress is removed.
Additionally I would only supply the Pi with an absolute maximum of 5.25 volts.
It would be interesting to see if adding a suitable cable from the USB power port on the Pi to the regulator in the sBITX also eliminated the warnings.
Good points made. The low voltage suppress line in config.txt is also present on the as-shipped sBitx 32bit so Jerry and I didn't question it on our builds. I run my sBitx at 12.8-13.8 volts without issues. One could measure the current and voltage at the Pi to see if they are sufficient. -JJ
|
Thanks Farhan. I am going to do it.?
--
-P // v3 #766
|
Re: Updating a V2 to V3 finals and need info
toggle quoted message
Show quoted text
On Sat, Mar 30, 2024, 11:09 PM Jens < hb9joi@...> wrote:
... can not open the link.
?
From: Ashhar
Farhan
Sent: Saturday, March 30, 2024 6:02 PM
Subject: Re: [BITX20] Updating a V2 to V3 finals and need
info
?
?
On Sat, Mar 30, 2024, 10:22 PM Evan Hand
<elhandjr@...> wrote:
Hi
Jens,
Two things come to mind, both around the LPF selection
circuits.
1 - There is diode failure such that only one LPF is
selected
2 - The HV generating circuit has a failure like Gordon Gibby
had.
First, verify the proper operation of the LPF selection changing
frequency in receive mode. Then, verify that the correct filter is
selected.
If receiving works, verify that the HV voltage is higher than
the peak voltage of the output. For 40 watts into 50 ohms, Vpeak =
Squartroot(2*50*power) = 63.4 volts.
Be sure to do all tests with a
dummy load connected.
73
Evan
AC9TU
|
This is an old software bug . Do an update and it will go away
Petr
This is what Farhan and I use
Raj
On 03/04/2024 4:49 PM, Petr Ourednik wrote:
Hi folks,
well another sBitx arrived, hi. (How many is enough?)
As its first time I meet the new v3 UI ¡I am a bit confused and
need to learn how to use it.
The first obstacle I have is the s/w UI keyboard. When I am
trying to switch ON the keyboard using KBD icon in the low-right
corner the sBitx app is turning OFF completely instead. Is there
anything what I am missing pls?
Thanks,
--
-P // v3 #766
|
I haven't worked on my sBitx DE for a while and probably won't be, so I thought I'd make it available to the group.
This is the Developers' Edition. It has been updated to V2 with the updated T/R switching and RTC. I've also added Zener diodes on some of the GPIO lines to protect the Raspberry Pi.
It's being offered without the Pi4 or the touch screen as I am using those in another project. It does include the updated hand mic from HFSignals.
I'm located near Columbus, Ohio US.
If you can use it, make me an offer.
--
73,
Mark, N8ME
|
Petr
This is what Farhan and I use
Raj
toggle quoted message
Show quoted text
On 03/04/2024 4:49 PM, Petr Ourednik wrote:
Hi folks,
well another sBitx arrived, hi. (How many is enough?)
As its first time I meet the new v3 UI ¡I am a bit confused and
need to learn how to use it.
The first obstacle I have is the s/w UI keyboard. When I am
trying to switch ON the keyboard using KBD icon in the low-right
corner the sBitx app is turning OFF completely instead. Is there
anything what I am missing pls?
Thanks,
--
-P // v3 #766
_._,_._,_
|
Hi folks,
well another sBitx arrived, hi. (How many is enough?)
As its first time I meet the new v3 UI ¡I am a bit confused and need to learn how to use it.
The first obstacle I have is the s/w UI keyboard. When I am trying to switch ON the keyboard using KBD icon in the low-right corner the sBitx app is turning OFF completely instead. Is there anything what I am missing pls?
Thanks,
--
-P // v3 #766
|
Re: Updating a V2 to V3 finals and need info
?
... what means :? HV voltage
??
?
?
toggle quoted message
Show quoted text
From: Jens
Sent: Saturday, March 30, 2024 6:39 PM
Subject: Re: [BITX20] Updating a V2 to V3 finals and need
info
?
... can not open the link.
?
From: Ashhar
Farhan
Sent: Saturday, March 30, 2024 6:02 PM
Subject: Re: [BITX20] Updating a V2 to V3 finals and need
info
?
?
On Sat, Mar 30, 2024, 10:22 PM Evan Hand
<elhandjr@...> wrote:
Hi
Jens,
Two things come to mind, both around the LPF selection
circuits.
1 - There is diode failure such that only one LPF is
selected
2 - The HV generating circuit has a failure like Gordon Gibby
had.
First, verify the proper operation of the LPF selection changing
frequency in receive mode. Then, verify that the correct filter is
selected.
If receiving works, verify that the HV voltage is higher than
the peak voltage of the output. For 40 watts into 50 ohms, Vpeak =
Squartroot(2*50*power) = 63.4 volts.
Be sure to do all tests with a
dummy load connected.
73
Evan
AC9TU
|
I am concerned about the use of this config.txt setting to suppress low battery voltage.
I have successfully fed power to several raspberry pis through the GPIO pins and never had to use this setting.
I think there is insufficient regulation to supply the peak current required by the PI.
Even if the warnings are suppressed the Pi will slow its clocks until the power stress is removed.
Additionally I would only supply the Pi with an absolute maximum of 5.25 volts.
It would be interesting to see if adding a suitable cable from the USB power port on the Pi to the regulator in the sBITX also eliminated the warnings.
|
Used now a raspberry pi 4b 4gb!thanks
|
Jens/HB9JOI
AE9J
Mark Erbaugh
Raj vu2zap