I did a performance test with my sBITX DE running v2 software and could not run the sbitx code and the Chrome interface on the single Raspberry Pi 4.? That was after swapping out the 2G for a 4G RPi 4 that I had in my parts bin. See this message for the details: /g/BITX20/message/101138Today I tried running with the Chrome interface on my Windows 10 desktop computer.? The performance was good.? No audio stutter, and the decodings were quick.? I do not yet have VNC or SSH and an Xwindow setup to measure the actual load under this condition. I will try again when the new v2 image is available for download. 73 Evan AC9TU
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Cheap too (4N25 $0.16 per 100).
Jack, W8TEE
On Sunday, April 16, 2023 at 04:13:00 PM EDT, Max via groups.io <kg4pid@...> wrote:
I prefer to use an optic isolator. A lot of protection in a small package.?
Max?
On Sunday, April 16, 2023, 02:05:40 PM CDT, Ashhar Farhan <farhanbox@...> wrote:
Rafael, Exposing attin85 pins directly to external lines can be risky. It would be better to tie the tx_line (it goes high on transmit) to a 2n7000 gate and use the drain as an open / close ptt switch. - f
On Sun, Apr 16, 2023, 11:25 PM Rafael Diniz < rafael@...> wrote: If you don't want to use Raj option, other option is to use the ATTiny85
port 6 in order to have independent control (just send the info to the
ATTiny85 via i2c).
Rafael
On 4/16/23 13:21, Ashhar Farhan wrote:
> It is best not to tap this off the raspberry pi line. Perhaps, we can
> use the usb port to signal this?
> - f
>
> On Sun, Apr 16, 2023, 12:54 PM Petr Ourednik <indians@...> wrote:
>
>? ? ?Yes Farhan, ptt out would be important feature as the output power
>? ? ?of V2 seems to be enough to exciting standard amps.
>
>? ? ?- P
>
>
--
Jack, W8TEE
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I prefer to use an optic isolator. A lot of protection in a small package.?
Max?
On Sunday, April 16, 2023, 02:05:40 PM CDT, Ashhar Farhan <farhanbox@...> wrote:
Rafael, Exposing attin85 pins directly to external lines can be risky. It would be better to tie the tx_line (it goes high on transmit) to a 2n7000 gate and use the drain as an open / close ptt switch. - f
On Sun, Apr 16, 2023, 11:25 PM Rafael Diniz < rafael@...> wrote: If you don't want to use Raj option, other option is to use the ATTiny85
port 6 in order to have independent control (just send the info to the
ATTiny85 via i2c).
Rafael
On 4/16/23 13:21, Ashhar Farhan wrote:
> It is best not to tap this off the raspberry pi line. Perhaps, we can
> use the usb port to signal this?
> - f
>
> On Sun, Apr 16, 2023, 12:54 PM Petr Ourednik <indians@...> wrote:
>
>? ? ?Yes Farhan, ptt out would be important feature as the output power
>? ? ?of V2 seems to be enough to exciting standard amps.
>
>? ? ?- P
>
>
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Ah,? a good spot. I wanted to check how fast the adc works. If you see, the pin 5 is being flipped on each iteration of the loop. So, I connected the pin5 to an oscilloscope to measure the time periods. It is cruft. It needs to be removed. - f
On Mon, Apr 17, 2023, 12:11 AM Rafael Diniz < rafael@...> wrote: Hi Ashhar and all,
What does it mean this part of the code of the ATtiny85, I don't get it:
--
?? if(flag == 1){
???? digitalWrite(5, LOW);
???? flag = 0;
?? }
?? else {
???? digitalWrite(5, HIGH);
???? flag = 1;
?? }
--
The example from Nicholas Zambetti does not have this:
Cheers,
Rafael
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Rafael, Exposing attin85 pins directly to external lines can be risky. It would be better to tie the tx_line (it goes high on transmit) to a 2n7000 gate and use the drain as an open / close ptt switch. - f
On Sun, Apr 16, 2023, 11:25 PM Rafael Diniz < rafael@...> wrote: If you don't want to use Raj option, other option is to use the ATTiny85
port 6 in order to have independent control (just send the info to the
ATTiny85 via i2c).
Rafael
On 4/16/23 13:21, Ashhar Farhan wrote:
> It is best not to tap this off the raspberry pi line. Perhaps, we can
> use the usb port to signal this?
> - f
>
> On Sun, Apr 16, 2023, 12:54 PM Petr Ourednik <indians@...> wrote:
>
>? ? ?Yes Farhan, ptt out would be important feature as the output power
>? ? ?of V2 seems to be enough to exciting standard amps.
>
>? ? ?- P
>
>
|
Hi Ashhar and all,
What does it mean this part of the code of the ATtiny85, I don't get it:
--
? if(flag == 1){
??? digitalWrite(5, LOW);
??? flag = 0;
? }
? else {
??? digitalWrite(5, HIGH);
??? flag = 1;
? }
--
The example from Nicholas Zambetti does not have this:
Cheers,
Rafael
|
If you don't want to use Raj option, other option is to use the ATTiny85 port 6 in order to have independent control (just send the info to the ATTiny85 via i2c).
Rafael
toggle quoted message
Show quoted text
On 4/16/23 13:21, Ashhar Farhan wrote: It is best not to tap this off the raspberry pi line. Perhaps, we can use the usb port to signal this?
- f
On Sun, Apr 16, 2023, 12:54 PM Petr Ourednik <indians@...> wrote:
Yes Farhan, ptt out would be important feature as the output power
of V2 seems to be enough to exciting standard amps.
- P
|
Re: Raspberry Pi 4 2GB vs Pi 4 8GB
I just discovered a kink in spectrum_update that was eating up the cpu. I will push out the changes to idle the cpu back to 40% on sbitx. - f
On Sun, Apr 16, 2023, 9:06 PM Joel Caulkins/N6ALT < caulktel@...> wrote: On Sat, Apr 15, 2023 at 10:03 PM, Evan Hand wrote:
When the iso for the v2 software is available
I'm really looking forward to this as my command line skills are somewhat limited.
Joel
N6ALT
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Re: Raspberry Pi 4 2GB vs Pi 4 8GB
On Sat, Apr 15, 2023 at 10:03 PM, Evan Hand wrote:
When the iso for the v2 software is available
I'm really looking forward to this as my command line skills are somewhat limited. Joel N6ALT
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Take the 12V from R10 upper side and feed to a 12V relay. Use the
relay contacts
as you want. The relay will isolate sBitx from your circuit.
Raj
On 16/04/2023 11:33 AM, Neluuu via
groups.io wrote:
toggle quoted message
Show quoted text
Does the subitx have the possibility of a PTT (one contact output)?
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Farhan
I am not sure about USB spec.?
The keyline output should go low during transmit to be used for transmit/receive switching of linear amplifiers and transverters. For keyline voltage and current limits standard is let say 30V/100mA.
- P
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It is best not to tap this off the raspberry pi line. Perhaps, we can use the usb port to signal this? - f
On Sun, Apr 16, 2023, 12:54 PM Petr Ourednik < indians@...> wrote: Yes Farhan, ptt out would be important feature as the output power of V2 seems to be enough to exciting standard amps.
- P
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We were ready to ship on monday. There were a few paperwork delays. We should ship in the next 24 hours. - f
On Sun, Apr 16, 2023, 1:39 PM Petr Ourednik < indians@...> wrote: Farhan
nice. Thanks you for info.
There is no rush. It is better to do everything calmly and correctly before shipping and not rush it.
- P
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Re: Cooling RPi4 in Sbitx
Thanks for the detailed information. I know that the solution is always in the details.
I noticed that the heat generating components are well placed on the SbitX v2 pcb.
It is still hard for me to realize that the device can be protected with control and clever technical solutions.
I've always been interested in the line from 'Minima' to 'SbitX'.
I especially like the All-In-One endeavor.
--
Gyula HA3HZ
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Farhan
nice. Thanks you for info.
There is no rush. It is better to do everything calmly and correctly before shipping and not rush it.
- P
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Yes, they are numbered. They will be shipped in 24 hours.
On Sun, Apr 16, 2023, 12:57 PM Petr Ourednik < indians@...> wrote: I have a non-technical question.?I am not sure how it was with V1 DE but will the V2 units be numbered (sn)?
- P
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Re: Cooling RPi4 in Sbitx
On the sbitx v2, we have? ample air vents on the top of the raspberry pi as well as on the side panels. I have busted tens of raspberry pi boards but none from too much heating. The raspberry pi draws about 250 mA of current at 5 volts. That is, about 1.25 watts. This includes chips other than the CPU itself. The heat is not really an issue with the raspberry pi. The main issue is with thr driver and the power amp transistors. - f
On Sun, Apr 16, 2023, 2:26 AM HA3HZ < gyula@...> wrote: The specific solution will probably be implemented during operation.
--
Gyula HA3HZ
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I have a non-technical question.?I am not sure how it was with V1 DE but will the V2 units be numbered (sn)?
- P
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Yes Farhan, ptt out would be important feature as the output power of V2 seems to be enough to exciting standard amps.
- P
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PTT is usually an input to signal that the operator wants to transmit. Do you want an output to control a linear amplifier?
Does the subitx have the possibility of a PTT (one contact output)?
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Joel Caulkins/N6ALT
Raj vu2zap
HA3HZ