[TangerineSDR] TangerineSDR Digest, Vol 31, Issue 1

Sat Oct 2 23:36:04 EDT 2021

I did get the email - thank you! I looked through the info on the second
page of the PDF and I have some questions, but it does confirm that there
are options for as many as four sensor boards, which fits with what I was
considering.

I think the box below the I2C table is wrong for the MCP9808; the addresses
should be 0x1E and 0x1F per the table, and the callout in the schematic. It
also mentions JMP1 in the second column, I think that should be JMP4.

I also noted that JMP4 is described as being set only on the local board in
most locations, but shown as "Placed" on the remote board in the NORMAL
MODE and EXTENDED MODE boxes.

I'm curious about whether there's a plan for deploying multiple sensors;
one of the notes implies that, without giving any other details. Would it
be a star configuration with the Pi at the center, or a daisy-chain using
both the RJ45 and J10 for the boards in the middle?

Thanks,
Bill N2RKL

On Sat, Oct 2, 2021 at 1:54 PM Julius Madey via TangerineSDR <
tangerinesdr at lists.tapr.org> wrote:

> I answered Bill a few days ago....perhaps he didn't receive the email.   I
> forwarded the latest schematic and layout for the board which has a section
> on setting i2c addresses.  Perhaps Scotty can update that further.
> Jules-K2KGJ
>
>
> On 10/2/2021 12:00 PM, tangerinesdr-request at lists.tapr.org wrote:
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> Today's Topics:
>
>    1. FW: [HamSCI] Two questions about the new TAPR magnetometer
>       board (Dr. Nathaniel A. Frissell Ph.D.)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 1 Oct 2021 16:22:25 +0000
> From: "Dr. Nathaniel A. Frissell Ph.D."
> 	<nathaniel.frissell at scranton.edu> <nathaniel.frissell at scranton.edu>
> To: "tangerinesdr at lists.tapr.org" <tangerinesdr at lists.tapr.org> <tangerinesdr at lists.tapr.org> <tangerinesdr at lists.tapr.org>
> Subject: [TangerineSDR] FW: [HamSCI] Two questions about the new TAPR
> 	magnetometer board
> Message-ID:
> 	<BLAPR03MB5540044997C2145BB6D46D2AF2AB9 at BLAPR03MB5540.namprd03.prod.outlook.com> <BLAPR03MB5540044997C2145BB6D46D2AF2AB9 at BLAPR03MB5540.namprd03.prod.outlook.com>
> 	
> Content-Type: text/plain; charset="us-ascii"
>
> Hi,
>
> I'm sending these questions from Bill N2RKL to the TangerineSDR list. They were originally posted on the HamSCI list.
>
> 73 Nathaniel
>
> From: hamsci at googlegroups.com <hamsci at googlegroups.com> <hamsci at googlegroups.com> On Behalf Of Bill Owens
> Sent: Thursday, September 30, 2021 9:22 AM
> To: HamSCI <hamsci at googlegroups.com> <hamsci at googlegroups.com>
> Subject: [HamSCI] Two questions about the new TAPR magnetometer board
>
> I've listened to the last couple Zoom sessions and also found the layout pictures that Scotty showed a few weeks ago, but I haven't been able to work out answers for two questions:
>
>  - How many I2C addresses can be set for the magnetometer and the temperature sensor on each board?
>  - Are the RM3100 components soldered on the boards, or perhaps on half of them? It looks like there are options for SMT header sockets, and for the components themselves.
>
> Thanks,
> Bill N2RKL
> --
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