Looking at building ADC24 boards

[Chuck Jopson]

Thanks to Larry Cochrane's excellent documentation, it is feasible for
me to build his ADC24 boards.
After entering the BOM, it looks like the cost of a 4 channel board will
be around $160.

Who is interested in getting a board at this price?

For information about the board, do a web search on PSN-ADC24.

Please let me know if you want a board by posting on the net or sending
me an email.

Thanks,
Chuck Jopson

[August Johnson]

A couple years ago I had a batch of 9 bare PSN-ADC24 boards made. I populated one, was tough at the peak of the supply chain problems. I want to keep a couple more pc boards for myself but have 6 that are available. They were so cheap to have made, something like $5 each.  If someone wants a board, contact me.

August Johnson KG7BZ

[Gerald Payton]

VERY Interesting, August.  From your post, I assume your boards are not populated.  I also assume that Chuck's proposal is populated boards.  

August, have the CPUs been programmed and the method of payment, please?

What are you asking for the unpopulated boards, please?

-------------------------------------------------------------------------------------------------------------------------------------------------------------------

Chuck, this might alleviate you from a lot of work.  

Merry Christmas and Happy Holidays to ALL.

Jerry AB5R

[August Johnson]

Just to clarify, these are totally bare boards. I don't have any more CPU chips, I had enough trouble getting parts a couple years ago. I even had to rob the USB interface chip from a module I had!

August Johnson KG7BZ

[August Johnson]

And for anyone else who might want to order boards from jclpcb, it works very easily. You just select the double sided board option and upload the .zip file containing the gerbers. I had my boards within a week.

August KG7BZ

[Gerald Payton]

Looks GREAT.  

Chuck and I were investigating this project, but maybe you may be our answer.  I'll await Chuck's reply for his input.  I suspect that he is buried in holiday festivities and not visiting the PSN List often.

That being said, I definitely want and NEED one!  Please tell us your price, please.  Of course, if Chuck's quote included populated boards, that may be my best option.

73,

Jerry AB5R

[August Johnson]

I don't need any payment or postage for these boards. They were so cheap for the 9 that the the three that I'm keeping is worth the total. I just want to make sure that they will be used. Send me private message with mailing address and I'll get back to you about it.

August KG7BZ

[Gerald Payton]

Great, I will send an email via your ARRL email address if that works.

Thank you,

Jerry

[Chuck Jopson]

As I mentioned to Jerry privately, we should find out who would like an assembled PSN-ADC24 board,
and have the needed boards shipped to me for assembly. The $160 price would drop a bit since it included the
current price of a board from JLCPCB.

Thanks,
Chuck

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[Gerald Payton]

Chuck,

Did I misunderstand your first post?  The estimate of $160 would be populated. Is that correct?  Who quoted this estimate? 

Sorry if I misunderstood.

Jerry

[Chuck Jopson]

Yes, $160 is the cost of the board and parts to populate it.
I will do the assembly, programming and send a completed board.
It is a combination of component prices from Mouser and Jameco.
I won't know the exact cost until all components are ordered, but $160 is close.

Chuck

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[Gerald Payton]

Sounds good.  Sign me up on your list for one.

Jerry

[Weldon Bauman]

Please add me to the list for a populated board. 

Thanks, 

Weldon - kj6iod

On Dec 25, 2022, at 6:39 PM, Gerald Payton <aytonge...@gmail.com> wrote:

Sounds good.  Sign me up on your list for one.

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[Christopher Chapman]

Hi Chuck,

    I am definitely interested in buying one, please. Can you check your "SPAM" Folder, please ?

    Regards,

    Chris Chapman

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[Chuck Jopson]

Chris,
Yes, I have you down for a board.

Chuck

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[Chuck Jopson]

So I will order parts for 6 ADC24 boards:

2 for August,
1 for me (Chuck),
1 for Jerry,
1 for Chris Chapman.
1 for Weldon Bauman

I will have a better idea of the cost once I order the parts but right
now it looks to be around $160.
I am not sure how long it will take me to assemble/program/test the
boards, but I am shooting for
the first half of February as long as 'real' work and parts availability
don't get in the way.
I have already ordered the varactors and the paste stencil.

Chuck

[Christopher Chapman]

Hi Chuck, 

    Great ! Take it at your own pace - I am not desperate - Jerry may be !

    Regards,

    Chris

Chuck

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[August Johnson]

Chuck,

I'll get the bare boards mailed to you in the next couple days.

August

[Michael]

If it’s not too late, can I get in for one board?  If it is too late, maybe keep my name for any additional runs.

Thanks!!

Mike Kimzey

On Dec 28, 2022, at 10:40 AM, August Johnson <augjo...@gmail.com> wrote:



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[August Johnson]

Mike,

Unfortunately all the boards I have are now committed.

August KG7BZ

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[Chuck Jopson]

The 6 ADC24 boards are assembled and I have flashed Larry's code into
them via the USB port.
I still have to test them by connecting them to WinADR.

Below is my list of recipients for the boards.
Could you all email your shipping address to my personal email?

Price of a board will be $150 plus shipping. I will email you with
shipping cost and tracking
after I have shipped them, do not pay me until then.

I am not sure how long it will take me to test the boards, hopefully
only a week or so.
Please note that I built them with the resistor network shown on the
schematics,
+-2.5 volt input(i think...) with a 45Hz lowpass filter. If you need
something different from this,
you will have to change out the input resistors.

Thanks,
Chuck

[James Skinner]

Just a general question for the group, has anyone tried using just one of the Garmin GPS Pucks on multiple 24 Bit Digitizers ? My digitizers are all

stacked  on top of each other and I was hoping to be able to just parallel the GPS output to all three of them.

Jim Skinner, Tucson, AZ

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[James Skinner]

Additional comment:  I would hope to just use one digitizer to power the GPS receiver and fan out the timing signal to all three.

Was planning to do the same with the main power to the digitizer stack as it's coming from a medium sized UPS for backup power.

Jim Skinner, Tucson, AZ

 

[Larry Cochrane]

Hi Jim,

Yes you can drive multiple digitizers with one GPS receiver. You will need to make a special Y cable so that only one
digitizer supplies +5VDC, ground and the transmit output line from the digitizer. The other digitizer only gets ground,
GPS receiver output and the 1 PPS signals.

Regards,
-Larry

On 2/5/2023 8:43 AM, James Skinner wrote:
> Additional comment:  I would hope to just use one digitizer to power the GPS receiver and fan out the timing signal to
> all three.
>
> Was planning to do the same with the main power to the digitizer stack as it's coming from a medium sized UPS for backup
> power.
>
> Jim Skinner, Tucson, AZ
>
>
> On Sun, Feb 5, 2023 at 9:30 AM James Skinner <k6b...@gmail.com <mailto:k6b...@gmail.com>> wrote:
>
> Just a general question for the group, has anyone tried using just one of the Garmin GPS Pucks on multiple 24 Bit
> Digitizers ? My digitizers are all
> stacked  on top of each other and I was hoping to be able to just parallel the GPS output to all three of them.
>
> Jim Skinner, Tucson, AZ
>

> psnlist+u...@googlegroups.com <mailto:psnlist%2Bunsu...@googlegroups.com>.

> To view this discussion on the web visit
> https://groups.google.com/d/msgid/psnlist/7bf50504-d8e3-9ecb-a3e1-8c8d326d3538%40growpro-inc.com

> <https://groups.google.com/d/msgid/psnlist/7bf50504-d8e3-9ecb-a3e1-8c8d326d3538%40growpro-inc.com>.

>
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[James Skinner]

- Larry -

Perfect, can you tell me which pins need to go to the "slaved" digitizers please.  I had been contemplating trying to do that

for several years, but now that I'll be running three of your 24 Bit Digitizers, I have plumb run out of room on my ceiling !!

Jim

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[Larry Cochrane]

Using this page as a reference https://www.seismicnet.com/gps/gps18.html you need pin 1 (1PPS), pin 2 (Serial Data
Output) and pin 5 (ground) wired to the second digitizer.

-Larry

On 2/5/2023 10:45 AM, James Skinner wrote:
> - Larry -
>
> Perfect, can you tell me which pins need to go to the "slaved" digitizers please.  I had been contemplating trying to do
> that
> for several years, but now that I'll be running three of your 24 Bit Digitizers, I have plumb run out of room on my
> ceiling !!
>
> Jim
>
>
> On Sun, Feb 5, 2023 at 11:29 AM Larry Cochrane <lar...@webtronics.com <mailto:lar...@webtronics.com>> wrote:
>
> Hi Jim,
>
> Yes you can drive multiple digitizers with one GPS receiver. You will need to make a special Y cable so that only one
> digitizer supplies +5VDC, ground and the transmit output line from the digitizer. The other digitizer only gets ground,
> GPS receiver output and the 1 PPS signals.
>
> Regards,
> -Larry
>
> On 2/5/2023 8:43 AM, James Skinner wrote:
> > Additional comment:  I would hope to just use one digitizer to power the GPS receiver and fan out the timing
> signal to
> > all three.
> >
> > Was planning to do the same with the main power to the digitizer stack as it's coming from a medium sized UPS for
> backup
> > power.
> >
> > Jim Skinner, Tucson, AZ
> >
> >

> > On Sun, Feb 5, 2023 at 9:30 AM James Skinner <k6b...@gmail.com <mailto:k6b...@gmail.com> <mailto:k6b...@gmail.com

> <mailto:k6b...@gmail.com>>> wrote:
> >
> >     Just a general question for the group, has anyone tried using just one of the Garmin GPS Pucks on multiple 24 Bit
> >     Digitizers ? My digitizers are all
> >     stacked  on top of each other and I was hoping to be able to just parallel the GPS output to all three of them.
> >
> >     Jim Skinner, Tucson, AZ
> >
> >     On Sat, Jan 28, 2023 at 10:57 AM Chuck Jopson <chu...@growpro-inc.com <mailto:chu...@growpro-inc.com>

> <mailto:psnlist%2Bunsu...@googlegroups.com <mailto:psnlist%252Buns...@googlegroups.com>>.

> >         To view this discussion on the web visit
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> <https://groups.google.com/d/msgid/psnlist/7bf50504-d8e3-9ecb-a3e1-8c8d326d3538%40growpro-inc.com>>.
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[James Skinner]

- Larry -

Thanks for the prompt response.

Jim

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[Xavier Bernard]

Hi Chuck,

Do you still have the BOMs for the different AmpFilter versions (3,4 channels)?

I cannot find them on GitHub right now.

Thanks!!

Xavier

[Jonathan]

Hi Xavior,

Chuck only built the ADC24 boards and there was already a BOM for those.

Jonathan 

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[Stefan Pittelkow]

Hi Xavier,

do you mean this one?

I'm also interested in building that board. Maybe we can make a bulk order.

Let me know!

Thanks

Stefan

--

[Mark Robinson]

I've tidied this up a bit. No checking or verification done. See
attached CSV file.

On 17/08/23 23:07, Stefan Pittelkow wrote:
> Hi Xavier,
> do you mean this one?
> I'm also interested in building that board. Maybe we can make a bulk order.
> Let me know!
>
> Thanks
> Stefan
>
> Am Mi., 16. Aug. 2023 um 22:31 Uhr schrieb Xavier Bernard

> <xav...@lynkz.ca <mailto:xav...@lynkz.ca>>:

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[Jonathan]

I had trouble getting some of the parts. The FT232RL-REEL was backordered with no backorder date, but there is stock in the FT232RNL-REEL which is a good substitute if you want to build a board. You can read about it here. 

Jonathan

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[Xavier Bernard]

Hi Jonathan,

Thanks for replying.

I see. I will check that out then.

We're a electronics design business so we'll manage.

For those interested in getting some boards professionally assembled at an assembly house let me know.

Also, we plan on making a newer version with LTE and Bluetooth. Change some parts for newer ones, etc...

Jonathan, can you share what you have so far?

Best,

Xavier

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[Xavier Bernard]

Awesome, thanks Stefan!

Get BlueMail for Android

[Jonathan]

Hi Xavier,

The board designs are not permitted for commercial use. They are designed and supported by Larry and you will have to get permission from him if you want to use his design in a commercial venture.

That Digi-Key cart for the 3-channel amplifier board is long gone, but I'm not going to support commercial use either, if that is your intention.

Jonathan

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[Xavier Bernard]

Hi Jonathan,

Got it. I tought this was open source as some of the older clients cannot get these boards anymore.

That is why I am here. His old clients in the mining industry need those and contacted us.

Maybe I missed the license file somewhere?

Best,

Xavier

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[Xavier Bernard]

Is this the one for the AmpFilter?

I was able to find the other BOM on the GitHub repo.

Best,

Xavier

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[Jonathan]

Hi Xavior,

It is open source, but if you are making profit, you need to ask permission from Larry. 

Jonathan

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[Xavier Bernard]

Hi Jonathan,

I was indeed planning on making a bit of a margin, otherwise we really don't have the time to spare.

Anyone knows how to contact him? I have tried several things to no avail.

Best,

Xavier Bernard, M.Sc
Président / President
Lynkz Instruments inc.
m:	1-(819)-342-4437
w:	www.lynkz.ca  e: xav...@lynkz.ca

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[Xavier Bernard]

Hi Stefan,

I just need to check with Larry if he doesn't mind us getting the boards available for everyone again. I am gathering some quotes right now to see how much it would cost.

Best,

Xavier Bernard, M.Sc
Président / President
Lynkz Instruments inc.
m:	1-(819)-342-4437
w:	www.lynkz.ca  e: xav...@lynkz.ca

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[Xavier Bernard]

Sorry, I meant Mark. Getting a bit lost in this thread!

I believe the CSV contains parts for the PSN-ADC24. I was looking for the other AmpFilter boards BOM. I will check with my client if they're willing to put in some effort in order to get this done.

Best,

Xavier Bernard, M.Sc
Président / President
Lynkz Instruments inc.
m:	1-(819)-342-4437
w:	www.lynkz.ca  e: xav...@lynkz.ca

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[Xavier Bernard]

Hi Jonathan,

I am sorry I made you angry, that was not my wish.

I asked, I was honest with you, you refused, you had the right and I thank you for your time.

We decided to re-create a new BOM with stocked/active parts for both boards. I will be more than happy to share them here when we're done.

Best,

Xavier Bernard, M.Sc
Président / President
Lynkz Instruments inc.
m:	1-(819)-342-4437
w:	www.lynkz.ca  e: xav...@lynkz.ca

-------- Message transféré --------

Sujet :	Re: [PsnList] Re: Looking at building ADC24 boards
Date :	Thu, 17 Aug 2023 11:32:35 -0400
De :	Jonathan <emum...@gmail.com>
Pour :	xav...@lynkz.ca

Hi Xavior,

You were planning on making profit, but you wanted my partial BOM of the 3-channel amplifier board to help you with that? That's not right.

Jonathan

To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/c29c8771-0ebe-9388-5354-22829f49815a%40lynkz.ca.

[Stephen Hammond]

I would be interested in an updated ADC24 board — please continue to post your progress here. Regards, Steve Hammond PSNsanjose.com

Sent from my iPhone

On Aug 17, 2023, at 9:03 AM, Xavier Bernard <xav...@lynkz.ca> wrote:



To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/fd2af337-caad-c21a-62f0-46943c7dd1bd%40lynkz.ca.

[Jonathan]

Steve,

I must emphasize, any use of Larry's works for commercial purposes should be approved by Larry, otherwise, it's infringement. 

Jonathan

To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/BB5FF37F-B434-4EBB-BD4C-1CA35D7549EB%40gmail.com.

[Xavier Bernard]

Hi Jonathan,

Don't worry. Everything I am planning to do is conditional to Larry's agreement.

Best,

Xavier Bernard, M.Sc
Président / President
Lynkz Instruments inc.
m:	1-(819)-342-4437
w:	www.lynkz.ca  e: xav...@lynkz.ca

To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/CAOY0kB1YDBuG-gK3RR_Xjrmnx_7yrgQ4-SKe2pOhZV0%2BV0%2BXsg%40mail.gmail.com.

[Larry Cochrane]

Hi Xavier and Jonathan,

Anyone can make my old boards for either personal or commercial usage. At this point I really don't care who makes them.

Regards,
Larry Cochrane
Webtronics

On 8/17/2023 10:32 AM, Xavier Bernard wrote:
> Hi Jonathan,
>
> Don't worry. Everything I am planning to do is conditional to Larry's agreement.
>
> Best,
>
> Xavier Bernard, M.Sc

> /Président / President/
> *Lynkz Instruments inc.*
> m: 1-(819)-342-4437
> w: www.lynkz.ca <https://lynkz.ca> e: xav...@lynkz.ca

>
> Le 8/17/2023 à 1:30 PM, Jonathan a écrit :
>> Steve,
>>
>> I must emphasize, any use of Larry's works for commercial purposes should be approved by Larry, otherwise, it's
>> infringement.
>>
>> Jonathan
>>
>> On Thu, Aug 17, 2023 at 1:27 PM Stephen Hammond <shamm...@gmail.com> wrote:
>>
>> I would be interested in an updated ADC24 board — please continue to post your progress here. Regards, Steve
>> Hammond PSNsanjose.com
>>
>> Sent from my iPhone
>>
>>> On Aug 17, 2023, at 9:03 AM, Xavier Bernard <xav...@lynkz.ca> wrote:
>>>
>>> 
>>>
>>> Hi Jonathan,
>>>
>>> I am sorry I made you angry, that was not my wish.
>>>
>>> I asked, I was honest with you, you refused, you had the right and I thank you for your time.
>>>
>>> We decided to re-create a new BOM with stocked/active parts for both boards. I will be more than happy to share
>>> them here when we're done.
>>>
>>> Best,
>>>
>>> Xavier Bernard, M.Sc

>>> /Président / President/
>>> *Lynkz Instruments inc.*
>>> m: 1-(819)-342-4437
>>> w: www.lynkz.ca <https://lynkz.ca> e: xav...@lynkz.ca

>>>
>>>
>>>
>>> -------- Message transféré --------
>>> Sujet : Re: [PsnList] Re: Looking at building ADC24 boards
>>> Date : Thu, 17 Aug 2023 11:32:35 -0400

>>> De : Jonathan <emum...@gmail.com> <mailto:emum...@gmail.com>

>>> Pour : xav...@lynkz.ca
>>>
>>>
>>>
>>> Hi Xavior,
>>>
>>> You were planning on making profit, but you wanted my partial BOM of the 3-channel amplifier board to help you
>>> with that? That's not right.
>>>
>>> Jonathan
>>>
>>> On Thu, Aug 17, 2023 at 10:24 AM Xavier Bernard <xav...@lynkz.ca> wrote:
>>>
>>> Sorry, I meant Mark. Getting a bit lost in this thread!
>>>
>>> I believe the CSV contains parts for the PSN-ADC24. I was looking for the other AmpFilter boards BOM. I will
>>> check with my client if they're willing to put in some effort in order to get this done.
>>>
>>> Best,
>>>
>>> Xavier Bernard, M.Sc

>>> /Président / President/
>>> *Lynkz Instruments inc.*
>>> m: 1-(819)-342-4437
>>> w: www.lynkz.ca <http://www.lynkz.ca> e: xav...@lynkz.ca

>>>
>>> On 2023-08-17 9:35 a.m., Xavier Bernard wrote:
>>>> Awesome, thanks Stefan!
>>>>

>>>> Get BlueMail for Android <https://bluemail.me>

>>>> On Aug 17, 2023, at 7:46 a.m., Mark Robinson <p...@zl2tod.net> wrote:
>>>>
>>>> I've tidied this up a bit. No checking or verification done. See
>>>> attached CSV file.
>>>>
>>>> On 17/08/23 23:07, Stefan Pittelkow wrote:
>>>>
>>>> Hi Xavier, do you mean this one? I'm also interested in building that board. Maybe we can make a
>>>> bulk order. Let me know! Thanks Stefan Am Mi., 16. Aug. 2023 um 22:31 Uhr schrieb Xavier Bernard

>>>> <xav...@lynkz.ca <mailto:xav...@lynkz.ca> <mailto:xav...@lynkz.ca>>: Hi Chuck, Do you still have the

>>>> BOMs for the different AmpFilter versions (3,4 channels)? I cannot find them on GitHub right now.
>>>> Thanks!! Xavier On Saturday, December 24, 2022 at 10:29:32 p.m. UTC-5 Chuck Jopson wrote: Thanks to
>>>> Larry Cochrane's excellent documentation, it is feasible for me to build his ADC24 boards. After
>>>> entering the BOM, it looks like the cost of a 4 channel board will be around $160. Who is interested
>>>> in getting a board at this price? For information about the board, do a web search on PSN-ADC24.
>>>> Please let me know if you want a board by posting on the net or sending me an email. Thanks, Chuck
>>>> Jopson -- You received this message because you are subscribed to the Google Groups "Public Seismic
>>>> Network Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send
>>>> an email to psnlist+u...@googlegroups.com <mailto:psnlist+u...@googlegroups.com>
>>>> <mailto:psnlist+u...@googlegroups.com>. To view this discussion on the web visit
>>>> https://groups.google.com/d/msgid/psnlist/c2870241-4bc2-4064-a34f-af2f3dd27119n%40googlegroups.com

>>>> <https://groups.google.com/d/msgid/psnlist/c2870241-4bc2-4064-a34f-af2f3dd27119n%40googlegroups.com?utm_medium=email&utm_source=footer <https://groups.google.com/d/msgid/psnlist/c2870241-4bc2-4064-a34f-af2f3dd27119n%40googlegroups.com?utm_medium=email&utm_source=footer>>. -- You received this message because you are subscribed to the Google Groups "Public Seismic Network Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an email to psnlist+u...@googlegroups.com <mailto:psnlist+u...@googlegroups.com> <mailto:psnlist+u...@googlegroups.com>. To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/CAE1xv5EnjCRnz2ZbzjHg_epss%3Djk6v68GjreOy8%3DXLqQgSy3CQ%40mail.gmail.com <https://groups.google.com/d/msgid/psnlist/CAE1xv5EnjCRnz2ZbzjHg_epss%3Djk6v68GjreOy8%3DXLqQgSy3CQ%40mail.gmail.com?utm_medium=email&utm_source=footer <https://groups.google.com/d/msgid/psnlist/CAE1xv5EnjCRnz2ZbzjHg_epss%3Djk6v68GjreOy8%3DXLqQgSy3CQ%40mail.gmail.com?utm_medium=email&utm_source=footer>>.

>>>>
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>>>> psnlist+u...@googlegroups.com.
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>>>> https://groups.google.com/d/msgid/psnlist/56da7bb4-e538-42f5-ac46-ce3edd5658c6%40lynkz.ca

>>>> <https://groups.google.com/d/msgid/psnlist/56da7bb4-e538-42f5-ac46-ce3edd5658c6%40lynkz.ca?utm_medium=email&utm_source=footer>.

>>> --
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>>> List" group.
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>>>
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>> <https://groups.google.com/d/msgid/psnlist/BB5FF37F-B434-4EBB-BD4C-1CA35D7549EB%40gmail.com?utm_medium=email&utm_source=footer>.

>>
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[Stephen Hammond]

I totally support that concept. As one of the moderators of the group I was a bit concerned when I saw making a profit in one of the postings. One of the things we will stop if it ever happens, would be adds posted relating to commercial sales from a commercial company just to be clear. Larry made a statement about the use of his materials. If you have any questions, look back at the past postings, you will get a good idea of what’s acceptable and what is not. For example, what you posted about building a board having it commercially made covering expenses and making a small profit for your time that’s more than acceptable. It’s to the benefit of everybody in the group. I feel we don’t want a bunch of advertisements like you’re seeing on Twitter these days.
Reared, Steve PSNsanjose.com

Sent from my iPhone

> On Aug 17, 2023, at 12:09 PM, Larry Cochrane <lar...@webtronics.com> wrote:
>
> Hi Xavier and Jonathan,

> To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/405cca95-bf74-bad5-c427-256dbcba5222%40webtronics.com.

[Xavier Bernard]

Thank you Larry and Stephen for clarifying that.

I will then go on with building the boards for our client (and anyone who needs them). I will definitely share any valuable outputs, files, etc... that would benefit the group.

This really isn't our core business by the way, even though we do have the expertise. We were asked if we could build a couple of those by one of our long term client since they knew we might be able to do so. We are not a supplier and we do not have any online catalogue or anything along those lines. We create cool IoT sensors, that's all.

How about that: All commercial transactions will include a margin for us, all other transactions including the ones with member of this group or people alike will pay "cost".

Best,

Xavier Bernard, M.Sc
Président / President
Lynkz Instruments inc.
m:	1-(819)-342-4437
w:	www.lynkz.ca  e: xav...@lynkz.ca

[Stephen Hammond]

I like the logo— looking forward to more postings Steve PSNsanjose.com

Sent from my iPhone

On Aug 17, 2023, at 1:34 PM, Xavier Bernard <xav...@lynkz.ca> wrote:



To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/696181e1-46fc-6bbd-b605-0dc1bc0450f8%40lynkz.ca.

[Jonathan]

Xavier,

Can you prove your expertise? Any changes to Larry’s design should be validated with data, especially the quality of the data acquisition. Adding noisy bells and whistles like Bluetooth does not help a sensitive data acquisition application. 

Can you share the “cost” with the group? How much per board are you charging your customer for the 3-channel amplifier board?

Jonathan

To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/D6EC0A1B-32E4-4AB0-AAAE-EE804ED1A2B1%40gmail.com.

[Xavier Bernard]

Hi Jonathan,

I have no reason to change any of the analog design parts. I know how tricky these circuits can be. What I would look for are parts that are becoming obselete and try to find a counterpart and properly test it in our lab.

As for communication interfaces, these very high frequencies (2.4GHz and 900MHz) should not interfere with the low frequencies at play here.

I have sent quote inquiries today for the PSN Board. I will share them with you when I get them. For the AmpFilter board, I still need to go through the schematics and build the BOM but we will have an idea when we look at the PSN board quote.

Do no hesitate if you have any other concerns or questions.

Best,

Xavier Bernard, M.Sc
Président / President
Lynkz Instruments inc.
m:	1-(819)-342-4437
w:	www.lynkz.ca  e: xav...@lynkz.ca

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[Jón Frímann Jónsson]

Hello,

In my experience with Larry hardware. I've been interference from radio communication far up as 3500Mhz to 3800Mhz (C-Band). It was enough to distort the recording. I never figured out if this was from the board picking up the noise or the geophone. The radio noise can be a problem if a 3G to 5G hardware is being used close to the earthquake detection set-up. In certain radio transmitters set-up, everything down to FM band (87,5Mhz to 108,0Mhz) can interfere with the earthquake recording hardware if it is close by. I don't think there's any good way to shield away from this. Just keep the hardware from strong radio sources, including 4G and 5G hardware if possible to limit the risk.

There's no noise from wlan at 2,4Ghz. But that uses only 100mW of transmission power at maximum, generally less than this.

Best regards,
Jón Frímann

To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/9d4af5df-deee-f6cc-621f-357397b65484%40lynkz.ca.

[Xavier Bernard]

Hi,

Thanks for sharing this.

Indeed, BLE and LTE Cat-M1 use very low tx power. That is why they are good otpions for IoT and battery powered devices.

When 3G/4G/5G technologies are used we really need to watch for EMI.

I would like to explore this further and see if such a system could be designed to be used in remote areas using very little hardware for power supply. LoRaWAN is also a very good candidate for battery power telemetry.

Best,

Xavier

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[Jonathan]

Hi Xavier,

There are more ways that bells and whistles that use higher frequencies can cause interference and noise. I know that the thing to do these days is to make everything wireless, but you need to do special engineering when it comes to this sort of thing. Many people connect these boards to Pi’s or similar, run Earthworm, and send data over the network. 

Be sure to spend the extra money and use high quality components that you would use in sensitive analog circuits like the ones on the 3-channel amplifier. 

And why don’t you post the BOM of the 3-channel amplifier board when you create it. It’ll benefit the community that is clearly benefiting you. 

Jonathan 

To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/ca1fd9b5-b5d2-45ac-89ae-acb5a0e4e7d3%40lynkz.ca.

[Xavier Bernard]

Hi Jonathan,

My master of electrical engineering and 10+ years in PCBA design will definitely help me do exactly that.

For the newer wireless versions ( if I ever get there ) I could indeed use striplines and via shielding in order to protect senstive front end nets from EMI.

As stated in my previous posts, I will share the whole manufacturing package as is when I have it ready.

Best,

Xavier

Get BlueMail for Android

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[Jonathan]

Hi Xavier,

Then why do you need to use Larry’s design? With your background, just roll your own. Create a multichannel seismic amplifier of your own design. 

Why did you ask me for a BOM if you are more that capable of doing it yourself? 

And why can’t you just post the BOM before your manufacturing package? Are you afraid someone might use it for commercial purposes?

And why can’t you tell us the price? 

Jonathan

To view this discussion on the web visit https://groups.google.com/d/msgid/psnlist/f94e0776-0cfe-41c8-8e02-294d950dddca%40lynkz.ca.

[Xavier Bernard]

Jonathan,

These questions have pretty obivous answers.

You can find the answers in my previous posts.

Have a great day,

Xavier

Get BlueMail for Android

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[Xavier Bernard]

Hi all,

I got the 2 quotes from oversea assembly house. Still haven't heard from N-A ones.

BOMs are still WIP.

Best,

Xavier Bernard, M.Sc
Président / President
Lynkz Instruments inc.
m:	1-(819)-342-4437
w:	www.lynkz.ca  e: xav...@lynkz.ca

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