[TangerineSDR] (no subject)

Mon Apr 20 10:56:48 EDT 2020

All,

WRT the magnetometer (and Temp sensor) design,  I've been in contact with
David, Tom and Scotty with the intent to start from their present position
and make it 100% compatible (including cabling).
It would be a dis-service to the group for me to go off and "design my
own".  (I don't have an ego to fill...)

I respect the work that has already been done by David, Tom and Scotty and
having them as a resource is invaluable.  I plan to take advantage of that.
They have access to resources I do not (and probably vice-versa), so a team
effort is the only thing that makes sense to get these projects rolled out
in a well-synchronized and timely manner.

John N8OBJ

p.s. I hope this makes it to more than Dave Larsen - not sure how the
lists.tapr.org list server works...
Could someone on that list let me know it worked?   Thanks!

John C. Gibbons
Director - Sears Undergraduate Design Laboratory
Dept. of Electrical Engineering and Computer Science
Case Western Reserve University
10900 Euclid Ave, Glennan 314
Cleveland, Ohio  44106-7071
Phone (216) 368-2816 <216-368-2816> FAX (216) 368-6888 <216-368-6888>
E-mail: jcg66 at case.edu

On Mon, Apr 20, 2020 at 10:20 AM Dave Larsen via TangerineSDR <
tangerinesdr at lists.tapr.org> wrote:

> This line of discussion has totally missed Dave  Witten's original point.
>
> Here is a summary to help clarify the discussion:
>
> 1. PNI has a simple board RM3100 $20 but us difficult to work with by
> itself  (https://www.pnicorp.com/product/rm3100-breakout-board/)
>
> 2. PNI has a development board to make the board in $195 59 connect to the
> (https://www.pnicorp.com/product/rm3100-breakout-board/)
>
> 3. In Dave, developed a simple development that would cost in the $30
> range for development purposes. this board with the RM3100 function as the
> 1 and 2 but cheaper
> See image labeled "Dev Board 1"  Created by Dave KD0EAG  (8 exist)
>
> 4 Is the prototype Magnetometer boards set  for the PSWS two require to
> remotely place the magnetometer.  The board set need only on PNI RM3100 to
> function. The on indoors is unpopulated in the PNI RM3100 socket.
> This image does not have a PN RM3100 board.
> See Image labeled  "PSWS_prototype_1.jpg  Created by KD0EAG (4 exits)
> See Image labeled  "Outside PSWS prototype board populated with RM3100
>
> Boards 2, 3 , and 4 require a PNI RM 3100 to function.  No other
> magnetometers have been considered at this point.
>
> Dave's original question is Since part of the project to to support STEM
> learning in students Could TAPR offer the Board 3 as a low cost board to
> explore Magnetometers independent of the PSWS project.
>
> The Board 4 or a revision will continue to be the PSWS magnetometer using
> only 1 PNI RM3100 per two board set.
>
> So far, Scotty and Nathaniel have expressed negative feedback on selling
> board 3 at TAPR not associated with the PSWS project.
>
> I have been running Dave's  software with board 3 from the last 3 weeks
> connect to my odroid-n2 with no failures.
>
> Dave Larsen  KV0S
>
>
>
> On Mon, Apr 20, 2020 at 8:09 AM Kim, Hyomin via TangerineSDR <
> tangerinesdr at lists.tapr.org> wrote:
>
>> Yes I agree. Especially, if we deal with only one type of sensor.
>> My proposal is that once PNI3100 (supposedly the cheapest and yet
>> scientifically usable) is successfully developed and extensively tested,
>> then we can consider a little more performance-oriented version.
>>
>> Hyomin
>>
>> [image: NJIT logo] <https://www.njit.edu/> *Hyomin Kim*
>> Assistant Professor
>> Physics
>> Center for Solar-Terrestrial Research
>> Institute for Space Weather Sciences
>> hmkim at njit.edu • (973) 596-5704
>> https://web.njit.edu/~hmkim/
>> 104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102
>>
>>
>> On Mon, Apr 20, 2020 at 9:01 AM Dr. Nathaniel A. Frissell Ph.D. <
>> nathaniel.frissell at scranton.edu> wrote:
>>
>>> Hi Hyomin,
>>>
>>>
>>>
>>> I mean a unified system for the PNI3100 sensor. The idea is that we
>>> should have one set of circuitry for the magnetometer for both the low cost
>>> and tangerine PSWSs. These two systems should be as unified and compatible
>>> as reasonably possible at all levels.
>>>
>>>
>>>
>>> 73 de Nathaniel
>>>
>>>
>>>
>>> *From:* Kim, Hyomin <hmkim at njit.edu>
>>> *Sent:* Monday, April 20, 2020 8:59 AM
>>> *To:* TAPR TangerineSDR Modular Software Defined Radio <
>>> tangerinesdr at lists.tapr.org>
>>> *Cc:* Dr. Nathaniel A. Frissell Ph.D. <nathaniel.frissell at scranton.edu>;
>>> David Witten <wittend at wwrinc.com>
>>> *Subject:* Re: [TangerineSDR] (no subject)
>>>
>>>
>>>
>>> Hi Nathaniel
>>>
>>> A unified system for the PNI3100 sensor? Or do we have any other sensor
>>> solution on the table? I am simply asking because I think I am missing
>>> something here...
>>>
>>>
>>>
>>> Hyomin
>>>
>>>
>>>
>>>
>>>
>>>
>>> [image: NJIT logo] <https://www.njit.edu/>
>>>
>>> *Hyomin Kim*
>>> Assistant Professor
>>> Physics
>>> Center for Solar-Terrestrial Research
>>> Institute for Space Weather Sciences
>>> hmkim at njit.edu • (973) 596-5704
>>> https://web.njit.edu/~hmkim/
>>> 104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102
>>>
>>>
>>>
>>>
>>>
>>> On Mon, Apr 20, 2020 at 7:54 AM Dr. Nathaniel A. Frissell Ph.D. via
>>> TangerineSDR <tangerinesdr at lists.tapr.org> wrote:
>>>
>>> Hi John and David,
>>>
>>>
>>>
>>> Is there a way that we can use the exact same design of magnetometer for
>>> both the Tangerine and Low-Cost versions of the PSWS? I would really like
>>> to see this hardware unified if possible.
>>>
>>>
>>>
>>> 73 de Nathaniel W2NAF
>>>
>>>
>>>
>>> *From:* TangerineSDR <tangerinesdr-bounces at lists.tapr.org> *On Behalf
>>> Of *John Gibbons via TangerineSDR
>>> *Sent:* Saturday, April 18, 2020 2:59 PM
>>> *To:* TAPR TangerineSDR Modular Software Defined Radio <
>>> tangerinesdr at lists.tapr.org>
>>> *Cc:* John Gibbons <jcg66 at case.edu>; David Witten <wittend at wwrinc.com>
>>> *Subject:* Re: [TangerineSDR] (no subject)
>>>
>>>
>>>
>>> David KD0EAG,
>>>
>>>
>>>
>>> I'm developing the low cost PSWS and the PNI RM3100 magnetometer is
>>> slated to be on it.  I just purchased 10 of their dev modules and am now
>>> starting the remote interface design.
>>>
>>>
>>>
>>> Where are you in the design for this aspect of the project?  Scotty sent
>>> me the XCVR chip (NXP PCA9615DPJ) he was looking at that would extend
>>> the I^2C bus, but I was wondering if I'm re-inventing the wheel here.
>>>
>>>
>>>
>>> My platform is a RasPi3B+, so I can talk to both SPI and I^2C.   Are you
>>> also planning on using the MCP9808 temp sensor (and will it be remote with
>>> the magnetometer?)?
>>>
>>> Also, do you have a cable (like CAT5) picked for the cable and have you
>>> picked a pinout yet?  Making these the same makes a lot of sense long term.
>>>
>>> I've been looking at the standard CAT5 cable and it has some wire swaps
>>> on pins 3-4-5-6 that would make them good for power runs and 1-2 / 7-8
>>> would be better for differential comm paths.
>>>
>>>
>>>
>>> If you have any C (or python) code  talk to these units I'm very
>>> interested if you are willing to share - if not, I understand..
>>>
>>>
>>>
>>> I also have 40+ years of PCB layout experience, so I would be glad to
>>> help with that (as I'm already doing it for the PSWS).
>>>
>>>
>>>
>>> Let me know where I can help.
>>>
>>>
>>>
>>> John N8OBJ
>>>
>>>
>>>
>>>
>>>
>>> John C. Gibbons
>>>
>>> Director - Sears Undergraduate Design Laboratory
>>>
>>> Dept. of Electrical Engineering and Computer Science
>>>
>>> Case Western Reserve University
>>>
>>> 10900 Euclid Ave, Glennan 314
>>>
>>> Cleveland, Ohio  44106-7071
>>> Phone (216) 368-2816 <216-368-2816> FAX (216) 368-6888 <216-368-6888>
>>> E-mail: jcg66 at case.edu
>>>
>>>
>>>
>>>
>>>
>>> On Sat, Apr 18, 2020 at 1:46 PM David Witten via TangerineSDR <
>>> tangerinesdr at lists.tapr.org> wrote:
>>>
>>> I have already sent messages to David McGraw and John Gibbons offering
>>> to send Simple Magnetometer Support Boards (SMSB's) immediately if they
>>> wish.
>>>
>>>
>>>
>>> I do have a few of the full Magnetometer Support Boards with Extension
>>> (MSBx's)  unpopulated PCBs but they would take time to stuff and test.
>>> They are built in pairs, and contain more and more aggravating parts to
>>> solder.  The final layout of these boards remains significantly in flux,
>>> and out of my hands.
>>>
>>>
>>>
>>> Depending on the situation, I find the SMSBs much easier to work with
>>> for testing code, etc.  They are cheap, easy to populate, essentially
>>> disposable, and seem to work well.  They just do not test the lowest noise
>>> levels we hope to achieve.  To my knowledge, the significance of this
>>> difference has yet to be established.
>>>
>>>
>>>
>>> I'm happy to work with anyone within my personal limitations, and am
>>> eager to see as many of these devices in test as possible.
>>>
>>>
>>>
>>> Dave Witten, KD0EAG
>>>
>>>
>>>
>>> From: "Dr. Nathaniel A. Frissell Ph.D." <nathaniel.frissell at scranton.edu
>>> >
>>> To: David McGaw <david.g.mcgaw at dartmouth.edu>, TangerineSDR Listserv <
>>> tangerinesdr at lists.tapr.org>
>>> Cc:
>>> Bcc:
>>> Date: Sat, 18 Apr 2020 11:30:25 +0000
>>> Subject: Re: [TangerineSDR] Magnetometer Status 2020-02-13
>>> Thank you, David. We will do that.
>>> Dave Witten, Scotty, and Hyomin, I think we should make sure Dave McGaw
>>> gets access to some of these to test, especially since he has access to
>>> testing facilities and significant experience in this area.
>>> 73 de Nathaniel W2NAF
>>>
>>> --
>>> TangerineSDR mailing list
>>> TangerineSDR at lists.tapr.org
>>> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
>>>
>>> --
>>> TangerineSDR mailing list
>>> TangerineSDR at lists.tapr.org
>>> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
>>>
>>> --
>> TangerineSDR mailing list
>> TangerineSDR at lists.tapr.org
>> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
>>
>
>
> --
> KV0S - Dave Larsen
> Columbia, MO, USA
> --
> TangerineSDR mailing list
> TangerineSDR at lists.tapr.org
> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org
>
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