<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000">All,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000">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). </div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000">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...)</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000">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.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000">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.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000">John N8OBJ</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000">p.s. I hope this makes it to more than Dave Larsen - not sure how the <a href="http://lists.tapr.org">lists.tapr.org</a> list server works...</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000">Could someone on that list let me know it worked? Thanks!</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small;color:#000000"><br></div><div><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div><div><div><div><div><div>John C. Gibbons<br></div>Director - Sears Undergraduate Design Laboratory<br></div>Dept. of Electrical Engineering and Computer Science</div></div>Case Western Reserve University <br></div><div>10900 Euclid Ave, <span style="font-size:12.8px">Glennan 314</span><span style="color:rgb(0,0,0);font-family:Helvetica;font-size:12.8px"><br></span></div></div><div><span style="color:rgb(0,0,0);font-family:Helvetica;font-size:12.8px">Cleveland, Ohio 44106-7071</span><br style="color:rgb(0,0,0);font-family:Helvetica;font-size:12.8px"><span style="color:rgb(0,0,0);font-family:Helvetica;font-size:12.8px">Phone </span><a href="tel:216-368-2816" value="+12163684572" style="color:rgb(17,85,204);font-family:Helvetica;font-size:12.8px" target="_blank">(216) 368-2816</a><span style="color:rgb(0,0,0);font-family:Helvetica;font-size:12.8px"> FAX </span><a href="tel:216-368-6888" value="+12163686888" style="color:rgb(17,85,204);font-family:Helvetica;font-size:12.8px" target="_blank">(216) 368-6888</a><br style="color:rgb(0,0,0);font-family:Helvetica;font-size:12.8px"><span style="color:rgb(0,0,0);font-family:Helvetica;font-size:12.8px">E-mail: </span><a href="mailto:jcg66@case.edu" style="color:rgb(17,85,204);font-family:Helvetica;font-size:12.8px" target="_blank">jcg66@case.edu</a><br style="color:rgb(0,0,0);font-family:Helvetica;font-size:12.8px"><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 20, 2020 at 10:20 AM Dave Larsen via TangerineSDR <<a href="mailto:tangerinesdr@lists.tapr.org" target="_blank">tangerinesdr@lists.tapr.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr">This line of discussion has totally missed Dave Witten's original point.<div><br></div><div>Here is a summary to help clarify the discussion:<br><div><br></div><div>1. PNI has a simple board RM3100 $20 but us difficult to work with by itself (<a href="https://www.pnicorp.com/product/rm3100-breakout-board/" target="_blank">https://www.pnicorp.com/product/rm3100-breakout-board/</a>)</div><div><br></div><div>2. PNI has a development board to make the board in $195 59 connect to the (<a href="https://www.pnicorp.com/product/rm3100-breakout-board/" target="_blank">https://www.pnicorp.com/product/rm3100-breakout-board/</a>)</div><div><br></div><div>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</div><div>See image labeled "Dev Board 1" Created by Dave KD0EAG (8 exist)</div><div><br></div><div>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.</div><div>This image does not have a PN RM3100 board. </div><div>See Image labeled "PSWS_prototype_1.jpg Created by KD0EAG (4 exits)</div><div>See Image labeled "Outside PSWS prototype board populated with RM3100 </div><div><br></div><div>Boards 2, 3 , and 4 require a PNI RM 3100 to function. No other magnetometers have been considered at this point.<br></div><div><br></div><div>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.</div><div><br></div><div>The Board 4 or a revision will continue to be the PSWS magnetometer using only 1 PNI RM3100 per two board set.</div><div><br></div><div>So far, Scotty and Nathaniel have expressed negative feedback on selling board 3 at TAPR not associated with the PSWS project. </div><div><br></div><div>I have been running Dave's software with board 3 from the last 3 weeks connect to my odroid-n2 with no failures.</div><div><br></div><div>Dave Larsen KV0S </div><div> </div><div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 20, 2020 at 8:09 AM Kim, Hyomin via TangerineSDR <<a href="mailto:tangerinesdr@lists.tapr.org" target="_blank">tangerinesdr@lists.tapr.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr">Yes I agree. Especially, if we deal with only one type of sensor. <div>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. </div><div><br></div><div>Hyomin</div><div><br clear="all"><div><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><table style="border-collapse:collapse;width:525px;border-spacing:0px;background-color:transparent;color:rgb(35,38,54);font-family:Poppins,sans-serif;font-size:16px"><tbody style="border:0px;padding:0px;font-size:0.9em"><tr><td style="padding:5px;font-size:0.9em;font-stretch:normal;line-height:1.5;color:rgb(255,0,0);border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(204,0,0);width:180px;vertical-align:middle"><a href="https://www.njit.edu/" style="background-color:transparent;color:rgb(51,122,183)" target="_blank"><img src="https://assets.njit.edu/uicomponents/NJIT-email-logo.png" alt="NJIT logo" style="border: 0px; display: block; vertical-align: middle; width: 150px; height: auto; max-width: 150px;"></a></td><td style="padding:5px 5px 5px 10px;font-size:12px;font-stretch:normal;line-height:16px;border:0px;font-family:Arial,Helvetica,sans-serif"><strong style="color:rgb(111,111,111);font-size:13px">Hyomin Kim</strong><br><font color="#6f6f6f">Assistant Professor</font><br><font color="#6f6f6f">Physics<br></font><font color="#666666">Center for Solar-Terrestrial Research<br>Institute for Space Weather Sciences</font><br><font color="#666666"><a href="mailto:hmkim@njit.edu" target="_blank">hmkim@njit.edu</a> • <span style="white-space:nowrap">(973) 596-5704</span><br><a href="https://web.njit.edu/~hmkim/" target="_blank">https://web.njit.edu/~hmkim/</a><br>104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102<br></font></td></tr></tbody></table></div></div></div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 20, 2020 at 9:01 AM Dr. Nathaniel A. Frissell Ph.D. <<a href="mailto:nathaniel.frissell@scranton.edu" target="_blank">nathaniel.frissell@scranton.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal">Hi Hyomin,<u></u><u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal">73 de Nathaniel<u></u><u></u></p>
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<p class="MsoNormal"><b>From:</b> Kim, Hyomin <<a href="mailto:hmkim@njit.edu" target="_blank">hmkim@njit.edu</a>> <br>
<b>Sent:</b> Monday, April 20, 2020 8:59 AM<br>
<b>To:</b> TAPR TangerineSDR Modular Software Defined Radio <<a href="mailto:tangerinesdr@lists.tapr.org" target="_blank">tangerinesdr@lists.tapr.org</a>><br>
<b>Cc:</b> Dr. Nathaniel A. Frissell Ph.D. <<a href="mailto:nathaniel.frissell@scranton.edu" target="_blank">nathaniel.frissell@scranton.edu</a>>; David Witten <<a href="mailto:wittend@wwrinc.com" target="_blank">wittend@wwrinc.com</a>><br>
<b>Subject:</b> Re: [TangerineSDR] (no subject)<u></u><u></u></p>
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<p class="MsoNormal">Hi Nathaniel<u></u><u></u></p>
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<p class="MsoNormal">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...<u></u><u></u></p>
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<p class="MsoNormal">Hyomin<u></u><u></u></p>
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<p class="MsoNormal"><a href="https://www.njit.edu/" target="_blank"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(51,122,183);text-decoration:none"><img border="0" width="150" height="60" style="width: 1.5625in; height: 0.625in;" id="gmail-m_1244239036236594298gmail-m_5762231028098248345gmail-m_2226443211099554358gmail-m_4146462257408459215gmail-m_1585811914353545128gmail-m_-5053158647583938970_x0000_i1025" src="https://assets.njit.edu/uicomponents/NJIT-email-logo.png" alt="NJIT logo"></span></a><span style="font-size:10pt;font-family:Arial,sans-serif;color:red"><u></u><u></u></span></p>
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<p class="MsoNormal" style="line-height:12pt"><strong><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(111,111,111)">Hyomin Kim</span></strong><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(35,38,54)"><br>
</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(111,111,111)">Assistant Professor</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(35,38,54)"><br>
</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(111,111,111)">Physics<br>
</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(102,102,102)">Center for Solar-Terrestrial Research<br>
Institute for Space Weather Sciences</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(35,38,54)"><br>
</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(102,102,102)"><a href="mailto:hmkim@njit.edu" target="_blank">hmkim@njit.edu</a> • (973) 596-5704<br>
<a href="https://web.njit.edu/~hmkim/" target="_blank">https://web.njit.edu/~hmkim/</a><br>
104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102</span><span style="font-size:9pt;font-family:Arial,sans-serif;color:rgb(35,38,54)"><u></u><u></u></span></p>
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<p class="MsoNormal">On Mon, Apr 20, 2020 at 7:54 AM Dr. Nathaniel A. Frissell Ph.D. via TangerineSDR <<a href="mailto:tangerinesdr@lists.tapr.org" target="_blank">tangerinesdr@lists.tapr.org</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Hi John and David,<u></u><u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal">73 de Nathaniel W2NAF<u></u><u></u></p>
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<p class="MsoNormal"><b>From:</b> TangerineSDR <<a href="mailto:tangerinesdr-bounces@lists.tapr.org" target="_blank">tangerinesdr-bounces@lists.tapr.org</a>>
<b>On Behalf Of </b>John Gibbons via TangerineSDR<br>
<b>Sent:</b> Saturday, April 18, 2020 2:59 PM<br>
<b>To:</b> TAPR TangerineSDR Modular Software Defined Radio <<a href="mailto:tangerinesdr@lists.tapr.org" target="_blank">tangerinesdr@lists.tapr.org</a>><br>
<b>Cc:</b> John Gibbons <<a href="mailto:jcg66@case.edu" target="_blank">jcg66@case.edu</a>>; David Witten <<a href="mailto:wittend@wwrinc.com" target="_blank">wittend@wwrinc.com</a>><br>
<b>Subject:</b> Re: [TangerineSDR] (no subject)<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:black">David KD0EAG,</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:black">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.</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:black">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.</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:black">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?)? </span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:black">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.</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:black">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.</span><u></u><u></u></p>
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to these units I'm very interested if you are willing to share - if not, I understand..</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:black">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).</span><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:black">John N8OBJ</span><u></u><u></u></p>
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<p class="MsoNormal">John C. Gibbons<u></u><u></u></p>
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<p class="MsoNormal">Director - Sears Undergraduate Design Laboratory<u></u><u></u></p>
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<p class="MsoNormal">Dept. of Electrical Engineering and Computer Science<u></u><u></u></p>
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<p class="MsoNormal">Case Western Reserve University
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<span style="font-size:9.5pt">Glennan 314</span><u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12pt"><span style="font-size:9.5pt;font-family:Helvetica,sans-serif;color:black">Cleveland, Ohio 44106-7071<br>
Phone </span><a href="tel:216-368-2816" target="_blank"><span style="font-size:9.5pt;font-family:Helvetica,sans-serif;color:rgb(17,85,204)">(216) 368-2816</span></a><span style="font-size:9.5pt;font-family:Helvetica,sans-serif;color:black"> FAX </span><a href="tel:216-368-6888" target="_blank"><span style="font-size:9.5pt;font-family:Helvetica,sans-serif;color:rgb(17,85,204)">(216)
368-6888</span></a><span style="font-size:9.5pt;font-family:Helvetica,sans-serif;color:black"><br>
E-mail: </span><a href="mailto:jcg66@case.edu" target="_blank"><span style="font-size:9.5pt;font-family:Helvetica,sans-serif;color:rgb(17,85,204)">jcg66@case.edu</span></a><u></u><u></u></p>
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<p class="MsoNormal">On Sat, Apr 18, 2020 at 1:46 PM David Witten via TangerineSDR <<a href="mailto:tangerinesdr@lists.tapr.org" target="_blank">tangerinesdr@lists.tapr.org</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">I have already sent messages to David McGraw and John Gibbons offering to send Simple Magnetometer Support Boards (SMSB's) immediately if they wish. <u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Dave Witten, KD0EAG<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">From: "Dr. Nathaniel A. Frissell Ph.D." <<a href="mailto:nathaniel.frissell@scranton.edu" target="_blank">nathaniel.frissell@scranton.edu</a>><br>
To: David McGaw <<a href="mailto:david.g.mcgaw@dartmouth.edu" target="_blank">david.g.mcgaw@dartmouth.edu</a>>, TangerineSDR Listserv <<a href="mailto:tangerinesdr@lists.tapr.org" target="_blank">tangerinesdr@lists.tapr.org</a>><br>
Cc: <br>
Bcc: <br>
Date: Sat, 18 Apr 2020 11:30:25 +0000<br>
Subject: Re: [TangerineSDR] Magnetometer Status 2020-02-13<br>
Thank you, David. We will do that.<br>
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.<br>
73 de Nathaniel W2NAF<u></u><u></u></p>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr">KV0S - Dave Larsen<br>Columbia, MO, USA</div>
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