August 2023 - pacsat-dev - mailman.amsat.org

Pacsat dev mtg 8/31/2023
by Bill 31 Aug '23

31 Aug '23

Pacsat dev mtg 8/31/2023 Thu, Aug 31, 2023 7:00 PM - 9:00 PM (CDT) Please join my meeting from your computer, tablet or smartphone. https://meet.goto.com/551513301 You can also dial in using your phone. (For supported devices, tap a one-touch number below to join instantly.) United States: +1 (646) 749-3122 - One-touch: tel:+16467493122,,551513301# Access Code: 551-513-301 Join from a video-conferencing room or system. Dial in or type: 67.217.95.2 or inroomlink.goto.com Meeting ID: 551 513 301 Or dial directly: 551513301(a)67.217.95.2 or 67.217.95.2##551513301 Get the app now and be ready when your first meeting starts: https://meet.goto.com/install

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Re: Fwd: Re: Fwd: ITAR/EAR "Clearance" Process
by Jim McCullers 28 Aug '23

28 Aug '23

At some point we probably need outside experience and involvement to resolve RF issues. I can design a few filters that would be adequate but have zero experience working with PAs, definitely for space, and don’t want to see a repeat of the failed PAs like earlier. That’s where experience counts. As for software ideas or ideas concerning what a Pacsat should be is above my pay grade but I do have ideas. I do admit to my Pacsat experience being limited to chasing FalconSat-3 in it’s latter days. Never did make a connection but learned from my mistakes. As for avoidance of structured meetings I can relate but will say what I’ve learned in the past year sitting in on the Wednesday night meeting is invaluable. Deduct $.02 from my next paycheck. 73 Jim McCullers WA4CWI Does anyone on the team think we need an analog RF engineer at this point. Let me know if you think we do. I don't want to dilute our team meetings with "observers".... -------- Forwarded Message -------- Subject: Re: Fwd: ITAR/EAR "Clearance" Process Date: Mon, 28 Aug 2023 14:12:44 +0000 From: Jonathan Brandenburg <mailto:[email protected]> <jonathan(a)jonathanbrandenburg.com> To: Bill Reed <mailto:[email protected]> <bill(a)brconnect.com> His background is analog RF engineering, I believe. Jonathan On 8/28/2023 9:04 AM, Bill Reed wrote: Any idea what his skill set is? On 8/28/2023 8:36 AM, Jonathan Brandenburg wrote: Bill, Dave Benzel (email address below) is expressing an interest in discussion packet sats... If you want (it's entirely up to you) would you like to contact him as a potential volunteer? He attended one weekly engineering meeting and I take it he doesn't want to participate in structured meetings so I'm not sure how to engage him but I figure I'll let you know there's interest from him in packet sats. Jonathan -------- Forwarded Message -------- Subject: Re: ITAR/EAR "Clearance" Process Date: Fri, 25 Aug 2023 13:37:18 -0500 From: benzoid19(a)mindspring.com <mailto:[email protected]> <mailto:[email protected]> <benzoid19(a)mindspring.com> Reply-To: benzoid19(a)mindspring.com <mailto:[email protected]> <mailto:[email protected]> <benzoid19(a)mindspring.com> To: Jonathan Brandenburg <mailto:[email protected]> <jonathan(a)jonathanbrandenburg.com> Hi Jonathan - Thanks for note. No, nothing specific. At this point in my career, I am just looking for less structure... which doesn't really seem to fit in with your perfectly appropriate way of conducting projects. Thanks for keeping me in mind - I would really enjoy making what ever contribution I can, that may help unload some of your other folks. Seems like a great bunch, and can't wait to see us get more hardware in orbit. I'd like to send you some ideas I had on packet sats - working with the really fun IO-117 sat gave me a few ideas on how to improve this general system. Haahaaha - probably nothing you all haven't already thought of though !! - dB KD6RF -- Jonathan Brandenburg 1-214-213-1066 jonathan(a)jonathanbrandenburg.com <mailto:[email protected]> Using ProtonMail secure email service.

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Re: Fwd: Re: Fwd: ITAR/EAR "Clearance" Process
by Burns Fisher (AMSAT) 28 Aug '23

28 Aug '23

Not being an RF guy myself, I would not have thought so. But I saw this mail earlier and suggested to Jonathan that he contact Bill and Chris because of his "ideas about pacsats". Given that his ideas come from playing with an GreenCube and not from hardware, I thought maybe this was a software/operation suggestion. Up to you all, of course. 73, Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software* On Mon, Aug 28, 2023 at 10:23 AM Jonathan Brandenburg via pacsat-dev < pacsat-dev(a)amsat.org> wrote: > I should have also pointed out that even though his professional > background is "analog RF engineer", his desire as a volunteer with AMSAT is > in the area of packet sats. We often allow people to exercise what I'll > term "hobby skills" as a volunteer. > Jonathan > > On 8/28/2023 9:17 AM, Bill Reed via pacsat-dev wrote: > > Does anyone on the team think we need an analog RF engineer at this > point. Let me know if you think we do. I don't want to dilute our team > meetings with "observers".... > > > -------- Forwarded Message -------- > Subject: Re: Fwd: ITAR/EAR "Clearance" Process > Date: Mon, 28 Aug 2023 14:12:44 +0000 > From: Jonathan Brandenburg <jonathan(a)jonathanbrandenburg.com> > <jonathan(a)jonathanbrandenburg.com> > To: Bill Reed <bill(a)brconnect.com> <bill(a)brconnect.com> > > His background is analog RF engineering, I believe. > Jonathan > > On 8/28/2023 9:04 AM, Bill Reed wrote: > > Any idea what his skill set is? > On 8/28/2023 8:36 AM, Jonathan Brandenburg wrote: > > Bill, > > Dave Benzel (email address below) is expressing an interest in discussion > packet sats... If you want (it's entirely up to you) would you like to > contact him as a potential volunteer? > > He attended one weekly engineering meeting and I take it he doesn't want > to participate in structured meetings so I'm not sure how to engage him but > I figure I'll let you know there's interest from him in packet sats. > > Jonathan > > > -------- Forwarded Message -------- > Subject: Re: ITAR/EAR "Clearance" Process > Date: Fri, 25 Aug 2023 13:37:18 -0500 > From: benzoid19(a)mindspring.com <benzoid19(a)mindspring.com> > <benzoid19(a)mindspring.com> > Reply-To: benzoid19(a)mindspring.com <benzoid19(a)mindspring.com> > <benzoid19(a)mindspring.com> > To: Jonathan Brandenburg <jonathan(a)jonathanbrandenburg.com> > <jonathan(a)jonathanbrandenburg.com> > > Hi Jonathan - > > Thanks for note. No, nothing specific. At this point in my career, I am > just looking for less structure... which doesn't really seem to fit in with > your perfectly appropriate way of conducting projects. > > Thanks for keeping me in mind - I would really enjoy making what ever > contribution I can, that may help unload some of your other folks. Seems > like a great bunch, and can't wait to see us get more hardware in orbit. > > I'd like to send you some ideas I had on packet sats - working with the > really fun IO-117 sat gave me a few ideas on how to improve this general > system. Haahaaha - probably nothing you all haven't already thought of > though !! > > - dB KD6RF > > > > > > -- > Jonathan Brandenburg > 1-214-213-1066jonathan(a)jonathanbrandenburg.com > Using ProtonMail secure email service. > > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org > > > -- > Jonathan Brandenburg, KF5IDY > > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Re: Fwd: Re: Fwd: ITAR/EAR "Clearance" Process
by Jonathan Brandenburg 28 Aug '23

28 Aug '23

I should have also pointed out that even though his professional background is "analog RF engineer", his desire as a volunteer with AMSAT is in the area of packet sats. We often allow people to exercise what I'll term "hobby skills" as a volunteer. Jonathan On 8/28/2023 9:17 AM, Bill Reed via pacsat-dev wrote: > > Does anyone on the team think we need an analog RF engineer at this > point. Let me know if you think we do. I don't want to dilute our > team meetings with "observers".... > > > > -------- Forwarded Message -------- > Subject: Re: Fwd: ITAR/EAR "Clearance" Process > Date: Mon, 28 Aug 2023 14:12:44 +0000 > From: Jonathan Brandenburg <jonathan(a)jonathanbrandenburg.com> > To: Bill Reed <bill(a)brconnect.com> > > > > His background is analog RF engineering, I believe. > Jonathan > > On 8/28/2023 9:04 AM, Bill Reed wrote: >> >> Any idea what his skill set is? >> >> On 8/28/2023 8:36 AM, Jonathan Brandenburg wrote: >>> >>> Bill, >>> >>> Dave Benzel (email address below) is expressing an interest in >>> discussion packet sats... If you want (it's entirely up to you) >>> would you like to contact him as a potential volunteer? >>> >>> He attended one weekly engineering meeting and I take it he doesn't >>> want to participate in structured meetings so I'm not sure how to >>> engage him but I figure I'll let you know there's interest from him >>> in packet sats. >>> >>> Jonathan >>> >>> >>> >>> -------- Forwarded Message -------- >>> Subject: Re: ITAR/EAR "Clearance" Process >>> Date: Fri, 25 Aug 2023 13:37:18 -0500 >>> From: benzoid19(a)mindspring.com <benzoid19(a)mindspring.com> >>> Reply-To: benzoid19(a)mindspring.com <benzoid19(a)mindspring.com> >>> To: Jonathan Brandenburg <jonathan(a)jonathanbrandenburg.com> >>> >>> >>> >>> Hi Jonathan - >>> >>> Thanks for note. No, nothing specific. At this point in my career, >>> I am just looking for less structure... which doesn't really seem to >>> fit in with your perfectly appropriate way of conducting projects. >>> >>> Thanks for keeping me in mind - I would really enjoy making what >>> ever contribution I can, that may help unload some of your other >>> folks. Seems like a great bunch, and can't wait to see us get more >>> hardware in orbit. >>> >>> I'd like to send you some ideas I had on packet sats - working with >>> the really fun IO-117 sat gave me a few ideas on how to improve this >>> general system. Haahaaha - probably nothing you all haven't already >>> thought of though !! >>> >>> - dB KD6RF >>> >>> >>> >>> > > -- > Jonathan Brandenburg > 1-214-213-1066 > jonathan(a)jonathanbrandenburg.com > Using ProtonMail secure email service. > > ----------------------------------------------------------- > > pacsat-dev mailing list --pacsat-dev(a)amsat.org > View archives of this mailing list athttps://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email topacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences athttps://mailman.amsat.org -- Jonathan Brandenburg, KF5IDY

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Fwd: Re: Fwd: ITAR/EAR "Clearance" Process
by Bill Reed 28 Aug '23

28 Aug '23

Does anyone on the team think we need an analog RF engineer at this point. Let me know if you think we do. I don't want to dilute our team meetings with "observers".... -------- Forwarded Message -------- Subject: Re: Fwd: ITAR/EAR "Clearance" Process Date: Mon, 28 Aug 2023 14:12:44 +0000 From: Jonathan Brandenburg <jonathan(a)jonathanbrandenburg.com> To: Bill Reed <bill(a)brconnect.com> His background is analog RF engineering, I believe. Jonathan On 8/28/2023 9:04 AM, Bill Reed wrote: > > Any idea what his skill set is? > > On 8/28/2023 8:36 AM, Jonathan Brandenburg wrote: >> >> Bill, >> >> Dave Benzel (email address below) is expressing an interest in >> discussion packet sats... If you want (it's entirely up to you) would >> you like to contact him as a potential volunteer? >> >> He attended one weekly engineering meeting and I take it he doesn't >> want to participate in structured meetings so I'm not sure how to >> engage him but I figure I'll let you know there's interest from him >> in packet sats. >> >> Jonathan >> >> >> >> -------- Forwarded Message -------- >> Subject: Re: ITAR/EAR "Clearance" Process >> Date: Fri, 25 Aug 2023 13:37:18 -0500 >> From: benzoid19(a)mindspring.com <benzoid19(a)mindspring.com> >> Reply-To: benzoid19(a)mindspring.com <benzoid19(a)mindspring.com> >> To: Jonathan Brandenburg <jonathan(a)jonathanbrandenburg.com> >> >> >> >> Hi Jonathan - >> >> Thanks for note. No, nothing specific. At this point in my career, >> I am just looking for less structure... which doesn't really seem to >> fit in with your perfectly appropriate way of conducting projects. >> >> Thanks for keeping me in mind - I would really enjoy making what ever >> contribution I can, that may help unload some of your other folks. >> Seems like a great bunch, and can't wait to see us get more hardware >> in orbit. >> >> I'd like to send you some ideas I had on packet sats - working with >> the really fun IO-117 sat gave me a few ideas on how to improve this >> general system. Haahaaha - probably nothing you all haven't already >> thought of though !! >> >> - dB KD6RF >> >> >> >> -- Jonathan Brandenburg 1-214-213-1066 jonathan(a)jonathanbrandenburg.com Using ProtonMail secure email service.

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KiCad Files
by Bob Stricklin 28 Aug '23

28 Aug '23

All, I posted the current KiCAD project files in PacSatDocs under Hardware/PCB This package uses KiCAD Version 7.0.6-7.0.6-ubuntu22.04.1, release build There is still work to be done but I wanted to get this out there because the files are close to complete. In the next couple of days I will make some PDF files for of the schematics and PCB and pst those as well for anyone that does not want to install this version of KiCAD. If you do happen to load this and see you see things that need to be changed please let me know. Bob N5BRG

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Re: MRAM
by Chris Thompson 25 Aug '23

25 Aug '23

I have some larger MRAM chips that I got earlier in the project when I was going to make a small prototype board. Burns had supplied the instructions. Then Rich sent me one so I forgot about it. I have 4 but I am nervous to try to replace the ones on the booster board in case I can't get it to work again! I do have a hot air soldering station and did lift and replace two of the AX5043s, so perhaps it is not beyond my skill. But I may wait until I have finished any other code changes needed for symposium. 73 Chris On Fri, Aug 25, 2023, 13:26 Burns Fisher (AMSAT) via pacsat-dev < pacsat-dev(a)amsat.org> wrote: > That seems reasonable since Jonathan likes to spend money. And it is not > that much anyway, as such things go. > > I believe that the (base) software should automatically support larger > MRAMs since I first developed that part of it on a breadboard with a larger > MRAM. However, I only had a single chip on that breadboard, so no > guarantee, I'd be happy to be the guinea pig, at least once I get the I2c > driver fixed up. > > 73, > > Burns Fisher, WB1FJ > *AMSAT(R) Engineering -- Flight Software* > > > On Fri, Aug 25, 2023 at 1:17 PM Jim McCullers via pacsat-dev < > pacsat-dev(a)amsat.org> wrote: > >> At Thursday night’s meeting Chris brought up having more MRAM on future >> boards. >> >> The daughter board uses four smaller capacity chips due to the number >> required for the six boards created. >> >> >> >> The MRAM chips on the current board can be replaced but it will have to >> be done using a heat gun due to the pin characteristics of the chips. >> >> We could do some board swapping as no spares exist and I can replace the >> modules and test this time as we have capable software. >> >> >> >> One meg (128x8) regular chips (non-automotive/flight) cost approximately >> $10 each and four meg (512kx8) are approximately $21 each in single lots. >> >> Discounts start at purchases of 10 but are not that substantial. >> >> >> >> Jim McCullers >> >> WA4CWI >> >> ----------------------------------------------------------- >> >> pacsat-dev mailing list -- pacsat-dev(a)amsat.org >> View archives of this mailing list at >> https://mailman.amsat.org/hyperkitty/list/[email protected] >> To unsubscribe send an email to pacsat-dev-leave(a)amsat.org >> Manage all of your AMSAT-NA mailing list preferences at >> https://mailman.amsat.org >> > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Re: MRAM
by Burns Fisher (AMSAT) 25 Aug '23

25 Aug '23

That seems reasonable since Jonathan likes to spend money. And it is not that much anyway, as such things go. I believe that the (base) software should automatically support larger MRAMs since I first developed that part of it on a breadboard with a larger MRAM. However, I only had a single chip on that breadboard, so no guarantee, I'd be happy to be the guinea pig, at least once I get the I2c driver fixed up. 73, Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software* On Fri, Aug 25, 2023 at 1:17 PM Jim McCullers via pacsat-dev < pacsat-dev(a)amsat.org> wrote: > At Thursday night’s meeting Chris brought up having more MRAM on future > boards. > > The daughter board uses four smaller capacity chips due to the number > required for the six boards created. > > > > The MRAM chips on the current board can be replaced but it will have to be > done using a heat gun due to the pin characteristics of the chips. > > We could do some board swapping as no spares exist and I can replace the > modules and test this time as we have capable software. > > > > One meg (128x8) regular chips (non-automotive/flight) cost approximately > $10 each and four meg (512kx8) are approximately $21 each in single lots. > > Discounts start at purchases of 10 but are not that substantial. > > > > Jim McCullers > > WA4CWI > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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MRAM
by Jim McCullers 25 Aug '23

25 Aug '23

At Thursday night's meeting Chris brought up having more MRAM on future boards. The daughter board uses four smaller capacity chips due to the number required for the six boards created. The MRAM chips on the current board can be replaced but it will have to be done using a heat gun due to the pin characteristics of the chips. We could do some board swapping as no spares exist and I can replace the modules and test this time as we have capable software. One meg (128x8) regular chips (non-automotive/flight) cost approximately $10 each and four meg (512kx8) are approximately $21 each in single lots. Discounts start at purchases of 10 but are not that substantial. Jim McCullers WA4CWI

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Re: Pacsat dev mtg 8/24/2023
by Corey Minyard 24 Aug '23

24 Aug '23

I had something else come up tonight, and I'm not going to be able to make it again. --corey - AE5KM On Thu, Aug 24, 2023 at 1:09 PM Burns Fisher (AMSAT) via pacsat-dev <pacsat-dev(a)amsat.org> wrote: > > Oops. I won't be there tonight. I've been working on fixing the I2c driver so that it does a restart rather than a stop/start between writing a command and reading a register. This may (or may not) fix the problem reading the RTC, but it is wrong in any case and needs fixing both for PacSat and for Golf. > > 73, > > Burns Fisher, WB1FJ > AMSAT(R) Engineering -- Flight Software > > > On Thu, Aug 24, 2023 at 2:04 PM Bill via pacsat-dev <pacsat-dev(a)amsat.org> wrote: >> >> Pacsat dev mtg 8/24/2023 >> Thu, Aug 24, 2023 7:00 PM - 9:00 PM (CDT) >> >> Please join my meeting from your computer, tablet or smartphone. >> >> https://meet.goto.com/942587421 >> >> You can also dial in using your phone. >> (For supported devices, tap a one-touch number below to join instantly.) >> >> United States: +1 (646) 749-3122 >> - One-touch: tel:+16467493122,,942587421# >> >> Access Code: 942-587-421 >> >> Join from a video-conferencing room or system. >> Dial in or type: 67.217.95.2 or inroomlink.goto.com >> Meeting ID: 942 587 421 >> Or dial directly: 942587421(a)67.217.95.2 or 67.217.95.2##942587421 >> >> >> Get the app now and be ready when your first meeting starts: >> https://meet.goto.com/install >> >> >> >> ----------------------------------------------------------- >> >> pacsat-dev mailing list -- pacsat-dev(a)amsat.org >> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] >> To unsubscribe send an email to pacsat-dev-leave(a)amsat.org >> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org > > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

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