I ordered two Bitx40 over the weekend?and had delivery by?DHL.? They were here this morning.? I have ordered a lot of things in the past, even overnight, it was as fast as anyone could hope for.? Thx.
I also need picture and information for ordering cases for these radios.? I do want to be able to add the additional things.? I do not want a huge case to add them, just what is needed.
If anyone could offer any information about a good case kit for this latest kit and the most up to date add-ons, ( like the AGC and so on ).? I would surely be mighty appreciative.? It is ok to email me direct too.
Ron
KJ4FFG
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Thanks Allard, PE1NWL.
OK all, Yes because my situation is still in experiment ballkack.
So the perfect grounding and casing to avoid the stray capacity will be good.
ja9mat Hidehiko.
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Re: WANTED VK3YE LED LDR AGC diagram
Yes thats it, take the red wire from the 3 way socket and connect it to the input, output from AGC then goes to AF pot.
Think thats part of the fun, most is words from e-mails, bits of info from the forum, some good stuff on here, and theres at least 3 pages on Facebook. Plus it got some of us, experimenting again.
Plenty of help from others for me, never programmed a Raduino... so had help there. So nice to try and help others along the way. Cannot wait to get mine cased, but that could take a while.
Phil - G7BZD
On Wed, Jun 14, 2017 at 9:45 PM, M0LHT <m0lht.huw@...> wrote: i will use the heat shrink once its in the box and wired up ( after i show it flashing away and working).
where abouts did you connect yours too. do i take the audio from the board where the volume control socket is and fit it in-between the socket and the volume control pot.
as your probably aware this is my first time building and adding without instructions.
Huw?
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Re: WANTED VK3YE LED LDR AGC diagram
i will use the heat shrink once its in the box and wired up ( after i show it flashing away and working).
where abouts did you connect yours too. do i take the audio from the board where the volume control socket is and fit it in-between the socket and the volume control pot.
as your probably aware this is my first time building and adding without instructions.
Huw?
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Re: WANTED VK3YE LED LDR AGC diagram
I used a piece of heat shrink tubing over the LED/LDR, so its nicely confined and the LDR only sees the flashing of the LED, Level of flash is only low, although I think it depends on the LDR and the LED combination. Coupled with the RF gain, it becomes a fantastic RX to listen too. 3 pots + tuning pot so far. AF, RF, AGC and tuning.
Yours looks good, take it, all functions, having it adjustable I think maybe overkill, but without trying one will not know.
Phil - G7BZD?
On Wed, Jun 14, 2017 at 9:03 PM, M0LHT <m0lht.huw@...> wrote: so here it is Phil one board nearly finished. Thank you for your assistance. i haven't fitted the audio 10k trim pot i will need to shop around or hunt in the depths of a junk box for that part. i assume its just to tweek the volume to a reasonable level.
so the next question is where to fit the wires to the board.
I've put the pictures as files as they where massive.
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Re: WANTED VK3YE LED LDR AGC diagram
so here it is Phil one board nearly finished. Thank you for your assistance. i haven't fitted the audio 10k trim pot i will need to shop around or hunt in the depths of a junk box for that part. i assume its just to tweek the volume to a reasonable level.
so the next question is where to fit the wires to the board.
I've put the pictures as files as they where massive.
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Terry,
With the latest SW version 1.14.1 doing CW is a no brainer. The hacks needed for it are very simple. Take a look before you waste the BitX resources with a seperate TX.
PJH, N7PXY
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Very nice, thanks! ?I might even be able to remember that when using some other computer.
Oh, and nice to see that representation from Flora OR still outdoes the entire Portland metropolitan area.
Jerry, KE7ER
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On Tue, Jun 13, 2017 at 06:02 pm, Doug W wrote:
Just for fun I registered??
?
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Re: someone just deleted the entire BITX operators map - almost fixed
This could be automated with a Perl script running in a cron job. The www::mechanize::firefox module supports, among many other functions, the automation of clicking around on a web page.
Unfortunately, I haven't done any Google Maps or Web programming.
James
KE4MIQ
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Re: WANTED VK3YE LED LDR AGC diagram
Glad I could help. Look forward to your finished results
Phil - G7BZD
On Wed, Jun 14, 2017 at 6:55 AM, M0LHT <m0lht.huw@...> wrote: thank you Phil.
now that makes more sense to me. i can follow that.?
back to a bit of playing at lunchtime with the old soldering gun.
thanks ill post a photo or two once its done.
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
OK, now I have checked the ATmega328P documentation.
The digital IO pins have a pull-up only, guaranteed to be between 30k and 60k, which can be disabled.
The ATmega328P does not have an option to make it a pull-down like some processors do.
So me, I'd add an extra 10k resistor from the LM78L05 output to ground, and continue to use A0 as a digital input.
If you scope the LM78L05 output and find that when 12v TX is shut down the A0 line immediately falls from 5v to 3v, and then slowly decays toward zero, perhaps the analog read trick would work. ? But not something I would do.
John Smith:
> I already have right channel PTT circuit in the form of the Fldigi CW keying circuit
If all I wanted was a simple way to drive the Bitx40 for CW, I'd add an extra 10k resistor and skip all the FLdigi stuff.
If you already have the FLdigi stuff somehow dealing with this PTT thing, that's great.
Jerry, KE7ER
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On Wed, Jun 14, 2017 at 10:45 am, Jerry Gaffke wrote:
I haven't looked at the Nano documentation for the effective resistance of their pullup/pulldown scheme,
but it's most likely well under 100k.
?
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Allard:
> Another way to circumvent this situation might be to define A0 as an analog input?
I think I'd add a pulldown resistor somehow, make the behavior vaguely defined.
As you have found, there are significant differences between rigs on how fast that charge leaks away.
Using the extra complication of an ADC to read a digital input pains my soul, and is not guaranteed to fix the problem.
Jack:
> If the internal pull-up resistors on a pin are activated, doesn't that impact the voltage seen on the pin?
I haven't looked at the Nano documentation for the effective resistance of their pullup/pulldown scheme,
but it's most likely well under 100k.
You could program the Nano to give A0 a pulldown and use that instead of my $0.01 10k resistor.
Would probably work, and would probably happen within 10ms or so.
> ?Also, if the code does a?digitalRead(), the documentation says it returns HIGH or LOW.
> ?Is it true a digital read of a pin can return an "in-between" value with the internal pull-ups active??
You either get a 0 or a 1 back when you read a pin with digitalRead(). ?If the voltage at the pin happens to be midrange the result is indeterminate, but the result will be either a 1 or a 0.
Jerry, KE7ER
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On Wed, Jun 14, 2017 at 10:08 am, Allard PE1NWL wrote:
Another way to circumvent this situation might be to define A0 as an
analog input and define a higher threshold for a digital LOW/HIGH. What do
you think?
?
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Allard:
I'd give this a try.
Jack, W8TEE
From: Allard PE1NWL <pe1nwl@...>
To: [email protected]
Sent: Wednesday, June 14, 2017 1:09 PM
Subject: Re: [BITX20] CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Hmm, yes you may be right that in some cases the 7805 output hasn't
dropped sufficiently to represent a digital LOW.
Another way to circumvent this situation might be to define A0 as an
analog input and define a higher threshold for a digital LOW/HIGH. What do
you think?
73 Allard PE1NWL
On Wed, June 14, 2017 18:07, Jerry Gaffke via Groups.Io wrote:
> The code is doing a digitalRead(PTT_SENSE), I'd expect the threshold on
> the nano to be somewhere between 1 and 2 volts
> The problem is that when the +12v TX line into the LM78L05 at U3 goes to
> zero volts, the output of U3 remains up around 5v because there is no
> place for the charge on C150 and C151 to go. ??The pulldown resistor will
> eventually discharge those caps. ??The RC time constant of 0.2uF*20k = 4
> milliseconds, which should be fast enough. ??I'd put that new 10k resistor
> from U3-1 to ground, rather than from A0 to ground, the latter case would
> reduce the maximum voltage into the Nano A0 pin down from 5v to 2.5v.
> ??This also reduces the RC time constant to 2 milliseconds.
> ??
>
> On Wed, Jun 14, 2017 at 08:28 am, Jack Purdum wrote:
>
>>
>> Given your code, Allard, I'm surprised he needs a dropping resistor on
>> that line.
>> ??
>>
>
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Funny you should ask.. As I was reading Jack's post I was thinking, it's
an analog line, use it like one.
Vince.
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Hmm, yes you may be right that in some cases the 7805 output hasn't
dropped sufficiently to represent a digital LOW.
Another way to circumvent this situation might be to define A0 as an
analog input and define a higher threshold for a digital LOW/HIGH. What do
you think?
73 Allard PE1NWL
On Wed, June 14, 2017 18:07, Jerry Gaffke via Groups.Io wrote:
The code is doing a digitalRead(PTT_SENSE), I'd expect the threshold on
the nano to be somewhere between 1 and 2 volts
The problem is that when the +12v TX line into the LM78L05 at U3 goes to
zero volts, the output of U3 remains up around 5v because there is no
place for the charge on C150 and C151 to go. ??The pulldown resistor
will
eventually discharge those caps. ??The RC time constant of 0.2uF*20k = 4
milliseconds, which should be fast enough. ??I'd put that new 10k
resistor
from U3-1 to ground, rather than from A0 to ground, the latter case
would
reduce the maximum voltage into the Nano A0 pin down from 5v to 2.5v.
??This also reduces the RC time constant to 2 milliseconds.
??
On Wed, Jun 14, 2017 at 08:28 am, Jack Purdum wrote:
Given your code, Allard, I'm surprised he needs a dropping resistor on
that line.
??
--
Michigan VHF Corp.
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Hmm, yes you may be right that in some cases the 7805 output hasn't
dropped sufficiently to represent a digital LOW.
Another way to circumvent this situation might be to define A0 as an
analog input and define a higher threshold for a digital LOW/HIGH. What do
you think?
73 Allard PE1NWL
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Show quoted text
On Wed, June 14, 2017 18:07, Jerry Gaffke via Groups.Io wrote: The code is doing a digitalRead(PTT_SENSE), I'd expect the threshold on
the nano to be somewhere between 1 and 2 volts
The problem is that when the +12v TX line into the LM78L05 at U3 goes to
zero volts, the output of U3 remains up around 5v because there is no
place for the charge on C150 and C151 to go. ??The pulldown resistor will
eventually discharge those caps. ??The RC time constant of 0.2uF*20k = 4
milliseconds, which should be fast enough. ??I'd put that new 10k resistor
from U3-1 to ground, rather than from A0 to ground, the latter case would
reduce the maximum voltage into the Nano A0 pin down from 5v to 2.5v.
??This also reduces the RC time constant to 2 milliseconds.
??
On Wed, Jun 14, 2017 at 08:28 am, Jack Purdum wrote:
Given your code, Allard, I'm surprised he needs a dropping resistor on
that line.
??
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
I must have misunderstood. If the internal pull-up resistors on a pin are activated, doesn't that impact the voltage seen on the pin? Also, if the code does a digitalRead(), the documentation says it returns HIGH or LOW. Is it true a digital read of a pin can return an "in-between" value with the internal pull-ups active??
Jack, W8TEE
From: Jerry Gaffke via Groups.Io <jgaffke@...>
To: [email protected]
Sent: Wednesday, June 14, 2017 12:07 PM
Subject: Re: [BITX20] CW Offset does NOT work on Raduino_v1.14.1 for BITX40
The code is doing a digitalRead(PTT_SENSE), I'd expect the threshold on the nano to be somewhere between 1 and 2 volts The problem is that when the +12v TX line into the LM78L05 at U3 goes to zero volts, the output of U3 remains up around 5v because there is no place for the charge on C150 and C151 to go. ?The pulldown resistor will eventually discharge those caps. ?The RC time constant of 0.2uF*20k = 4 milliseconds, which should be fast enough. ?I'd put that new 10k resistor from U3-1 to ground, rather than from A0 to ground, the latter case would reduce the maximum voltage into the Nano A0 pin down from 5v to 2.5v. ?This also reduces the RC time constant to 2 milliseconds. ? On Wed, Jun 14, 2017 at 08:28 am, Jack Purdum wrote:
Given your code, Allard, I'm surprised he needs a dropping resistor on that line.
?
?
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That's another option. I already have right channel PTT circuit in the form of the Fldigi CW keying circuit. I was wondering if I will incorporate it. The final design is still floating around in my head. When this and Allard's added functionalities are done, this will be like a all mode 40 meter radio.?
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
The code is doing a digitalRead(PTT_SENSE), I'd expect the threshold on the nano to be somewhere between 1 and 2 volts
The problem is that when the +12v TX line into the LM78L05 at U3 goes to zero volts, the output of U3 remains up around 5v because there is no place for the charge on C150 and C151 to go. ?The pulldown resistor will eventually discharge those caps. ?The RC time constant of 0.2uF*20k = 4 milliseconds, which should be fast enough. ?I'd put that new 10k resistor from U3-1 to ground, rather than from A0 to ground, the latter case would reduce the maximum voltage into the Nano A0 pin down from 5v to 2.5v. ?This also reduces the RC time constant to 2 milliseconds.
?
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On Wed, Jun 14, 2017 at 08:28 am, Jack Purdum wrote:
Given your code, Allard, I'm surprised he needs a dropping resistor on that line.
?
?
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Given your code, Allard, I'm surprised he needs a dropping resistor on that line.
Jack, W8TEE
From: Allard PE1NWL <pe1nwl@...>
To: [email protected]
Sent: Wednesday, June 14, 2017 10:51 AM
Subject: Re: [BITX20] CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Hi Hidehiko-san Yes you could be right. Another possible cause could be poor grounding of BITX main board and Raduino board. If Raduino board is not grounded perfectly, some small potential difference may exist between BITX board and Raduino. As a result, A0 input will not be perfectly zero volts when PTT is not pressed. 73 Allard PE1NWL On Wed, June 14, 2017 15:33, qrper72@... wrote: > I've put the 10k pull-down register at the "A0" and maybe the problem > seems to be fixed now. This issue caused by the threshold problem? > > ja9mat Hidehiko. >
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Re: CW Offset does NOT work on Raduino_v1.14.1 for BITX40
Hi Hidehiko-san
Yes you could be right.
Another possible cause could be poor grounding of BITX main board and
Raduino board.
If Raduino board is not grounded perfectly, some small potential
difference may exist between BITX board and Raduino. As a result, A0 input
will not be perfectly zero volts when PTT is not pressed.
73 Allard PE1NWL
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On Wed, June 14, 2017 15:33, qrper72@... wrote: I've put the 10k pull-down register at the "A0" and maybe the problem
seems to be fixed now. This issue caused by the threshold problem?
ja9mat Hidehiko.
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Hidehiko Komachi - JA9MAT
Allard PE1NWL