[TangerineSDR] TangerineSDR Digest, Vol 13, Issue 37
David Witten
wittend at wwrinc.com
Mon Apr 20 12:04:04 EDT 2020
As I have replied to this email off-list, I attempted to provide simple
options for incorporating this subsystem into the 'low cost' as well as the
PSWS system from the first.
I have had no information about these projects so I included the most
painless, space efficient, and cost effective options that I could think
of. These include Qwiic/Stemma-QT connectors (SparkFun, Adafruit, others
for Arduino and Ras PI), Grove (SeeedStudio et. al.), JST-PH 1x4 or through
hole footprints. These in addition to the larger, more cumbersome coastal
'PMOD' connectors. One of these options should allow almost anything that
works with 3.3v I2C to use this subsystem.
The prototypes I have provided Hyomin should support all of these options.
Whether any of this will survive the final redesign of these boards by
Scotty is out of my hands.
I hope this helps
Dave Witten, KD0EAG
On Mon, Apr 20, 2020 at 8:00 AM <tangerinesdr-request at lists.tapr.org> wrote:
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> 1. Re: (no subject) (Dr. Nathaniel A. Frissell Ph.D.)
> 2. Re: (no subject) (Kim, Hyomin)
>
>
>
> ---------- Forwarded message ----------
> From: "Dr. Nathaniel A. Frissell Ph.D." <nathaniel.frissell at scranton.edu>
> 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>
> Bcc:
> Date: Mon, 20 Apr 2020 11:53:31 +0000
> Subject: Re: [TangerineSDR] (no subject)
>
> 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
>
>
>
>
> ---------- Forwarded message ----------
> From: "Kim, Hyomin" <hmkim at njit.edu>
> 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>
> Bcc:
> Date: Mon, 20 Apr 2020 08:59:09 -0400
> 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
>
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