[TangerineSDR] (no subject)

Mon Apr 20 09:08:28 EDT 2020

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
>
> --
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>
> --
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>
>
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