Welcome Charu,
I am under the sBitx's spell for the last week!
73, Raj
On 02/08/2022 4:51 PM, Charudatt Uplap
wrote:
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So
Ravi,
?
This
updated schematic now makes a lot of sense. I guess Farhan
should also update his schematic on github.
?
Thanks
Raj, you really made me sound like a dumb guy when you
answered with the C4 comment. Nevertheless thanks
?
regards
charudatt
¨C vu2upx
?
?
see here Ravi, attached circuits -
On 02/08/2022 4:14 PM, Ravi Miranda
wrote:
Hi Raj,?
Yes, the C4 goes to RF Tag, the wire
from Pin 4 (U3) seems to be a remnant of some link
unless it is meant to go to a specific location??
Looking a bit further, The Antenna
route goes from the Antenna jack via the LPF (not
energised) then via pin 7? to U3, so it would therefore
seem that the RF would reach the two RF tags is when the
LPF relay is energised, and then from there on to the
30MHz LPF.
Apologies, if I'm missing something,
thought I would chip in.
|
Can we run this Radio over VNC ? ? regards charudatt ¨C VU2UPX ?
|
Hi Farhan, ? Well this schematic is not up-to-date. ? Well one of your pledgers shared the updated schematic and made a things clear ? Can you please explain why did you use U3 instead of a simple DPDT relay for Antenna for Rx/Tx Cycle. ? Also if you may , explain the use of a Zener Diode for FSA switch supply ? ? Are there any heat issues with U7 , connecting 12V directly to it ? ? I ask you , since I am designing it at my end ? regards charudatt ¨C VU2UPX ?
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From: [email protected] <[email protected]> On Behalf Of Ashhar Farhan
Sent: 02 August 2022 15:18
To: [email protected]
Subject: Re: [BITX20] sBitx doubt ? The circuit is a direct plot from the production circuit layout. Charu, can you tell me where exactly is the problem? ? C4 goes to RF Tag. On 02/08/2022 2:06 PM, Charudatt Uplap wrote: Hi Farhan, ? Studying your circuit I have stumbled upon a query, how the antenna connected to your RF tag in the schematic. ? Is there anything missing in this section ? ?
? regards charudatt ¨C VU2UPX
|
Charu, Thanks for pointing this out. I will update it- f
So Ravi, ? This updated schematic now makes a lot of sense. I guess Farhan should also update his schematic on github. ? Thanks Raj, you really made me sound like a dumb guy when you answered with the C4 comment. Nevertheless thanks ? regards charudatt ¨C vu2upx ? ? see here Ravi, attached circuits - On 02/08/2022 4:14 PM, Ravi Miranda wrote: Hi Raj,? Yes, the C4 goes to RF Tag, the wire from Pin 4 (U3) seems to be a remnant of some link unless it is meant to go to a specific location?? Looking a bit further, The Antenna route goes from the Antenna jack via the LPF (not energised) then via pin 7? to U3, so it would therefore seem that the RF would reach the two RF tags is when the LPF relay is energised, and then from there on to the 30MHz LPF. Apologies, if I'm missing something, thought I would chip in. ? C4 goes to RF Tag. On 02/08/2022 2:06 PM, Charudatt Uplap wrote: Hi Farhan, ? Studying your circuit I have stumbled upon a query, how the antenna connected to your RF tag in the schematic. ? Is there anything missing in this section ? ?
? regards charudatt ¨C VU2UPX
-- I'm here to add more value to the world than I'm using up.
|
So Ravi, ? This updated schematic now makes a lot of sense. I guess Farhan should also update his schematic on github. ? Thanks Raj, you really made me sound like a dumb guy when you answered with the C4 comment. Nevertheless thanks ? regards charudatt ¨C vu2upx ?
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From: [email protected] <[email protected]> On Behalf Of Raj vu2zap
Sent: 02 August 2022 16:30
To: [email protected]
Subject: Re: [BITX20] sBitx doubt? see here Ravi, attached circuits - On 02/08/2022 4:14 PM, Ravi Miranda wrote: Hi Raj,? Yes, the C4 goes to RF Tag, the wire from Pin 4 (U3) seems to be a remnant of some link unless it is meant to go to a specific location?? Looking a bit further, The Antenna route goes from the Antenna jack via the LPF (not energised) then via pin 7? to U3, so it would therefore seem that the RF would reach the two RF tags is when the LPF relay is energised, and then from there on to the 30MHz LPF. Apologies, if I'm missing something, thought I would chip in. ? C4 goes to RF Tag. On 02/08/2022 2:06 PM, Charudatt Uplap wrote: Hi Farhan, ? Studying your circuit I have stumbled upon a query, how the antenna connected to your RF tag in the schematic. ? Is there anything missing in this section ? ? 
? regards charudatt ¨C VU2UPX
-- I'm here to add more value to the world than I'm using up.
|
Hi Raj,?
Thank you for this information, at first glance this is different to the one posted here:?
Anyway, will read the new one now.?
Cheers,
Best 73,
Ravi/M0RVI
see here Ravi, attached circuits -
On 02/08/2022 4:14 PM, Ravi Miranda
wrote:
Hi Raj,?
Yes, the C4 goes to RF Tag, the wire from Pin 4 (U3) seems
to be a remnant of some link unless it is meant to go to a
specific location??
Looking a bit further, The Antenna route goes from the
Antenna jack via the LPF (not energised) then via pin 7? to
U3, so it would therefore seem that the RF would reach the two
RF tags is when the LPF relay is energised, and then from
there on to the 30MHz LPF.
Apologies, if I'm missing something, thought I would chip
in.
Kind regards
Ravi/M0RVI
C4 goes to RF Tag.
On 02/08/2022 2:06 PM, Charudatt Uplap wrote:
Hi
Farhan,
?
Studying
your circuit I have stumbled upon a query, how the
antenna connected to your RF tag in the schematic.
?
Is
there anything missing in this section ?
?
?
regards
charudatt
¨C VU2UPX
--
I'm here to add more value
to the world than I'm using up.
-- I'm here to add more value to the world than I'm using up.
|
Great scot! I am wondering if there is a single document that describes the js8call
Hi Ashhar,
Thanks for the clarification.? I didn¡¯t think the demo was from the wjstx code.? I assumed it was ¡°native¡± code.
I will look forward to native sbitx JS8Call functionality but I am going to experiment with display operation and all the challenges of display sizing to see if I can really muck it up.? Yee haw!
Thanks for making such a cool platform, Scott?
|
see here Ravi, attached circuits -
On 02/08/2022 4:14 PM, Ravi Miranda
wrote:
toggle quoted message
Show quoted text
Hi Raj,?
Yes, the C4 goes to RF Tag, the wire from Pin 4 (U3) seems
to be a remnant of some link unless it is meant to go to a
specific location??
Looking a bit further, The Antenna route goes from the
Antenna jack via the LPF (not energised) then via pin 7? to
U3, so it would therefore seem that the RF would reach the two
RF tags is when the LPF relay is energised, and then from
there on to the 30MHz LPF.
Apologies, if I'm missing something, thought I would chip
in.
Kind regards
Ravi/M0RVI
C4 goes to RF Tag.
On 02/08/2022 2:06 PM, Charudatt Uplap wrote:
Hi
Farhan,
?
Studying
your circuit I have stumbled upon a query, how the
antenna connected to your RF tag in the schematic.
?
Is
there anything missing in this section ?
?
?
regards
charudatt
¨C VU2UPX
--
I'm here to add more value
to the world than I'm using up.
|
Hi Raj,?
Yes, the C4 goes to RF Tag, the wire from Pin 4 (U3) seems to be a remnant of some link unless it is meant to go to a specific location?? Looking a bit further, The Antenna route goes from the Antenna jack via the LPF (not energised) then via pin 7? to U3, so it would therefore seem that the RF would reach the two RF tags is when the LPF relay is energised, and then from there on to the 30MHz LPF.
Apologies, if I'm missing something, thought I would chip in.
Kind regards
Ravi/M0RVI
C4 goes to RF Tag.
On 02/08/2022 2:06 PM, Charudatt Uplap
wrote:
Hi
Farhan,
?
Studying
your circuit I have stumbled upon a query, how the antenna
connected to your RF tag in the schematic.
?
Is
there anything missing in this section ?
?
?
regards
charudatt
¨C VU2UPX
-- I'm here to add more value to the world than I'm using up.
|
Hi Ashhar,
Thanks for the clarification. ?I didn¡¯t think the demo was from the wjstx code. ?I assumed it was ¡°native¡± code.
I will look forward to native sbitx JS8Call functionality but I am going to experiment with display operation and all the challenges of display sizing to see if I can really muck it up. ?Yee haw!
Thanks for making such a cool platform, Scott?
|
The circuit is a direct plot from the production circuit layout. Charu, can you tell me where exactly is the problem? - f
C4 goes to RF Tag.
On 02/08/2022 2:06 PM, Charudatt Uplap
wrote:
Hi
Farhan,
?
Studying
your circuit I have stumbled upon a query, how the antenna
connected to your RF tag in the schematic.
?
Is
there anything missing in this section ?
?
?
regards
charudatt
¨C VU2UPX
|
On Mon, Aug 1, 2022 at 06:03 PM, Bob Benedict, KD8CGH wrote:
From time to time Microcenter has Pi 4s at list price. They were available locally and I picked a 4 GB one up on the 26th, just before the sBitx became available. They had "25+" in stock and none the next day, in spite of the limiting one to a customer.
I signed up for their daily email flyer and I just checked it every morning for availability. Seems they have a batch every month or so. Looks like you have to treat getting one like getting rock concert tickets.
--
? 73
??? Bob? KD8CGH
And they don't ship the Pis, so for those of us in FL, a trek to Atlanta just not worth it.
|
C4 goes to RF Tag.
On 02/08/2022 2:06 PM, Charudatt Uplap
wrote:
toggle quoted message
Show quoted text
Hi
Farhan,
?
Studying
your circuit I have stumbled upon a query, how the antenna
connected to your RF tag in the schematic.
?
Is
there anything missing in this section ?
?
?
regards
charudatt
¨C VU2UPX
|
Hi Farhan, ? Studying your circuit I have stumbled upon a query, how the antenna connected to your RF tag in the schematic. ? Is there anything missing in this section ? ? 
? regards charudatt ¨C VU2UPX
|
Re: Postman came with a box from hfsignals
Congrats Neils,
Mine is 0009
After personal coaching from Farhan I found a cheap logitec wireless keyb+mouse
a delight to use. I was able to upgrade after a git pull with instruction from the
manual.
Its about 15$ here in some bright colors!
Raj
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On 01/08/2022 8:54 PM, Niels Jalling wrote: Postman came with a boc from hfsignals a few minutes ago.
In the box was a sBitx Serial no 0014
Time to have fun.
73 de oz9ny, niels
|
Farhan:
Think about it. In my mind, the smartest thing Ritchie did was to develop a language with no inherent I/O. He pushed all of that stuff into the standard I/O libraries, leaving the language unchanged at the core. This is why C is one of the first languages brought up on a new system: The compiler is portable. If you push your I/O stuff into a HAL cubbyhole, I think a lot of things might be easier down the road.
Jack, W8TEE
On Monday, August 1, 2022 at 07:59:23 PM EDT, Ashhar Farhan <farhanbox@...> wrote:
My proposal is that we isolate all the wiring pi stuff (mostly flipping gpio pins and reading them) to a file called hw.c where we can port the sbitx to other platforms and write the required routines like read_key() or set_lpf() etc. Should we? - f
On Tue, Aug 2, 2022, 3:40 AM Bob Benedict, KD8CGH < rkayakr@...> wrote: I also stopped using Wiring Pi in favor of the extensive pigpio library for C/C++ and Python.
--
? 73
??? Bob? KD8CGH
--
Jack, W8TEE
|
Thanks. Just a thought since I have a pi400 and the astronomical price of the pi4. Barry
On Mon, Aug 1, 2022, 8:17 PM Ashhar Farhan < farhanbox@...> wrote: We looked at that option. It is prone to many problems because the gpio needs to be really close to the codec. With the RP400, we will have to use a cable that will create ground loops. While the software will run, you might have to add a USB sound card and change a few lines of code to use the USB sound. Not really recommended unless you have one and want to use it anyway. The present set of boards don't support it. - f
On Tue, Aug 2, 2022, 5:40 AM barry halterman < kthreebo@...> wrote: Would it be possible to run the sBitx on a PI400 with a mouse? ? Sent from for Windows ? ? My proposal is that we isolate all the wiring pi stuff (mostly flipping gpio pins and reading them) to a file called hw.c where we can port the sbitx to other platforms and write the required routines like read_key() or set_lpf() etc. ? On Tue, Aug 2, 2022, 3:40 AM Bob Benedict, KD8CGH <rkayakr@...> wrote: I also stopped using Wiring Pi in favor of the extensive pigpio library for C/C++ and Python.
--
? 73
??? Bob? KD8CGH
|
I agree that it's a good idea to isolate hardware support code into a Hardware Abstraction Layer - HAL.
JAMES
|
We looked at that option. It is prone to many problems because the gpio needs to be really close to the codec. With the RP400, we will have to use a cable that will create ground loops. While the software will run, you might have to add a USB sound card and change a few lines of code to use the USB sound. Not really recommended unless you have one and want to use it anyway. The present set of boards don't support it. - f
On Tue, Aug 2, 2022, 5:40 AM barry halterman < kthreebo@...> wrote: Would it be possible to run the sBitx on a PI400 with a mouse? ? Sent from for Windows ? ? My proposal is that we isolate all the wiring pi stuff (mostly flipping gpio pins and reading them) to a file called hw.c where we can port the sbitx to other platforms and write the required routines like read_key() or set_lpf() etc. ? On Tue, Aug 2, 2022, 3:40 AM Bob Benedict, KD8CGH <rkayakr@...> wrote: I also stopped using Wiring Pi in favor of the extensive pigpio library for C/C++ and Python.
--
? 73
??? Bob? KD8CGH
|
Using a Pi 400 would lose the self-contained aspect, and might present some shielding challenges since it would be outside the box. But it's the same processor with the same ports aside from one USB 2.0 port being permanently assigned to the keyboard, so it should work fine if you can deal with those things.
On Mon, Aug 1, 2022 at 8:10 PM barry halterman < kthreebo@...> wrote: Would it be possible to run the sBitx on a PI400 with a mouse? ? Sent from for Windows ? ? My proposal is that we isolate all the wiring pi stuff (mostly flipping gpio pins and reading them) to a file called hw.c where we can port the sbitx to other platforms and write the required routines like read_key() or set_lpf() etc. ? On Tue, Aug 2, 2022, 3:40 AM Bob Benedict, KD8CGH <rkayakr@...> wrote: I also stopped using Wiring Pi in favor of the extensive pigpio library for C/C++ and Python.
--
? 73
??? Bob? KD8CGH
|
Raj vu2zap
Shirley Dulcey KE1L