Thanks everyone for their feedback. I was really overthinking it. It turns out directly connecting the switch pins on the board and moving the switch between the battery leads and the board covers all the requirements. This isn't how I normally fly mine so I went down quite a few rabbit holes. Since a few folks mentioned changing NAR requirements, I've gone ahead and contacted them for clarification. If anything comes of it I will follow-up here.
On Fri, Apr 15, 2016 at 11:26 AM, <[email protected]> wrote: > Send altusmetrum mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.gag.com/mailman/listinfo/altusmetrum > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of altusmetrum digest..." > > > Today's Topics: > > 1. Re: altusmetrum Digest, Vol 64, Issue 1 (Sam Fineberg) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 15 Apr 2016 13:26:01 -0400 > From: Sam Fineberg <[email protected]> > To: [email protected] > Subject: Re: [altusmetrum] altusmetrum Digest, Vol 64, Issue 1 > Message-ID: <[email protected]> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > I wouldn't do it, its just another place to introduce points of failure, > and I didn't for my L3. Most L3CC's just want to see wiring according > to the altimeter manufacturer's specs. > > Sam > > On 4/15/2016 1:02 PM, Chris Attebery wrote: > > Double check with your L3CC. I've read in several places that NAR > > dropped that requirement. Personally I think it just adds complexity > > and more room for human error. > > > > On Fri, Apr 15, 2016 at 9:52 AM, Rob Derstadt <[email protected] > > <mailto:[email protected]>> wrote: > > > > I agree with the horizontal "safe mode" technique. It's what I use > > now. > > > > The current NAR requirement states: > > > > "The capability must exist to externally disarm all pyrotechnic > > devices on-board the rocket. In this context, ‘disarm’ means the > > ability to physically break the connection between a pyrotechnic > > system and its power source. ***Simply turning off the device > > controlling the pyrotechnic(s) may not be sufficient.***" > > > > 4. > > > > > > So is this really just using the other pole on the rotary switch > > to control the battery connection? > > > > > > > > On Fri, Apr 15, 2016 at 10:37 AM, > > <[email protected] > > <mailto:[email protected]>> wrote: > > > > Send altusmetrum mailing list submissions to > > [email protected] <mailto:[email protected]> > > > > To subscribe or unsubscribe via the World Wide Web, visit > > http://lists.gag.com/mailman/listinfo/altusmetrum > > or, via email, send a message with subject or body 'help' to > > [email protected] > > <mailto:[email protected]> > > > > You can reach the person managing the list at > > [email protected] > > <mailto:[email protected]> > > > > When replying, please edit your Subject line so it is more > > specific > > than "Re: Contents of altusmetrum digest..." > > > > > > Today's Topics: > > > > 1. Advice on wiring dual Telemetrums for arm/safe? (Rob > > Derstadt) > > 2. Re: Advice on wiring dual Telemetrums for arm/safe? (w9ya) > > 3. Re: Advice on wiring dual Telemetrums for arm/safe? (w9ya) > > 4. Re: Advice on wiring dual Telemetrums for arm/safe? > > (Chris Attebery) > > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Fri, 15 Apr 2016 09:57:17 -0600 > > From: Rob Derstadt <[email protected] > > <mailto:[email protected]>> > > To: [email protected] <mailto:[email protected]> > > Subject: [altusmetrum] Advice on wiring dual Telemetrums for > > arm/safe? > > Message-ID: > > > > < > cacycnxq1csrdaukeyi2objzegyegspfa4md7fint4peziob...@mail.gmail.com > > <mailto: > cacycnxq1csrdaukeyi2objzegyegspfa4md7fint4peziob...@mail.gmail.com>> > > Content-Type: text/plain; charset="utf-8" > > > > Hello, > > > > I'm trying to work out how to wire up the outputs of two > > Telemetrums (one > > primary, one backup) so that I can add an extra arm/disarm > > rotary switch > > between the outputs and the terminal blocks (the NAR L3 > > requirement to cut > > power completely from the pyro's). > > > > This is my initial wiring diagram: > > > > > https://github.com/robderstadt/NAR-L3-Project/blob/master/images/plans/GizmoXL_Wiring.png > > > > Normally I'd just *try* it and see what happens, but I don't > > want to fry > > two board if I get it wrong. I'm also concerned that in the > > "safe" position > > that the continuity indicator on each board would still > > indicate everything > > green, which could lead to a launch with the pyro's inhibited. > > > > Has anyone flown this configuration before? If so, any > > suggestions on how > > to hook it up? > > > > Thanks guys. > > > > -Rob > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: > > < > http://lists.gag.com/pipermail/altusmetrum/attachments/20160415/d697d7c1/attachment-0001.html > > > > > > ------------------------------ > > > > Message: 2 > > Date: Fri, 15 Apr 2016 10:23:24 -0600 > > From: w9ya <[email protected] <mailto:[email protected]>> > > To: Altus Metrum <[email protected] > > <mailto:[email protected]>> > > Subject: Re: [altusmetrum] Advice on wiring dual Telemetrums for > > arm/safe? > > Message-ID: > > > > <CAASHNdXAcBka= > [email protected] > > <mailto:e8%2bmvwy%[email protected] > >> > > Content-Type: text/plain; charset="utf-8" > > > > Um, please check with your L3CC.....quite a few of them do NOT > > want you to > > fly with switches in series with your charges !! > > > > Best regards; > > > > Bob F. > > > > On Fri, Apr 15, 2016 at 9:57 AM, Rob Derstadt > > <[email protected] <mailto:[email protected]>> wrote: > > > > > Hello, > > > > > > I'm trying to work out how to wire up the outputs of two > > Telemetrums (one > > > primary, one backup) so that I can add an extra arm/disarm > > rotary switch > > > between the outputs and the terminal blocks (the NAR L3 > > requirement to cut > > > power completely from the pyro's). > > > > > > This is my initial wiring diagram: > > > > > > > > > > > > https://github.com/robderstadt/NAR-L3-Project/blob/master/images/plans/GizmoXL_Wiring.png > > > > > > Normally I'd just *try* it and see what happens, but I don't > > want to fry > > > two board if I get it wrong. I'm also concerned that in the > > "safe" position > > > that the continuity indicator on each board would still > > indicate everything > > > green, which could lead to a launch with the pyro's inhibited. > > > > > > Has anyone flown this configuration before? If so, any > > suggestions on how > > > to hook it up? > > > > > > Thanks guys. > > > > > > -Rob > > > > > > _______________________________________________ > > > altusmetrum mailing list > > > [email protected] <mailto:[email protected]> > > > http://lists.gag.com/mailman/listinfo/altusmetrum > > > > > > > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: > > < > http://lists.gag.com/pipermail/altusmetrum/attachments/20160415/bd203845/attachment-0001.html > > > > > > ------------------------------ > > > > Message: 3 > > Date: Fri, 15 Apr 2016 10:33:25 -0600 > > From: w9ya <[email protected] <mailto:[email protected]>> > > To: Altus Metrum <[email protected] > > <mailto:[email protected]>> > > Subject: Re: [altusmetrum] Advice on wiring dual Telemetrums for > > arm/safe? > > Message-ID: > > > > < > caashndx4uphxhxgn+rjh1mkk81qomser7p6dioyf3fwwubs...@mail.gmail.com > > <mailto: > caashndx4uphxhxgn%[email protected]>> > > Content-Type: text/plain; charset="utf-8" > > > > P.S.... with the "flight mode" safeguards (turning on the unit > > while > > oriented horizontally protects you from incidental firing of > > charges, and > > then rebooting the TM after thee rocket has been placed on the > > pad and made > > ready for flight) makes the pyro activation switches > > essentially redundant > > !! (Virtually 100%, um; more or less....) > > > > > > On Fri, Apr 15, 2016 at 10:23 AM, w9ya <[email protected] > > <mailto:[email protected]>> wrote: > > > > > Um, please check with your L3CC.....quite a few of them do > > NOT want you to > > > fly with switches in series with your charges !! > > > > > > Best regards; > > > > > > Bob F. > > > > > > On Fri, Apr 15, 2016 at 9:57 AM, Rob Derstadt > > <[email protected] <mailto:[email protected]>> wrote: > > > > > >> Hello, > > >> > > >> I'm trying to work out how to wire up the outputs of two > > Telemetrums (one > > >> primary, one backup) so that I can add an extra arm/disarm > > rotary switch > > >> between the outputs and the terminal blocks (the NAR L3 > > requirement to cut > > >> power completely from the pyro's). > > >> > > >> This is my initial wiring diagram: > > >> > > >> > > >> > > > https://github.com/robderstadt/NAR-L3-Project/blob/master/images/plans/GizmoXL_Wiring.png > > >> > > >> Normally I'd just *try* it and see what happens, but I > > don't want to fry > > >> two board if I get it wrong. I'm also concerned that in the > > "safe" position > > >> that the continuity indicator on each board would still > > indicate everything > > >> green, which could lead to a launch with the pyro's inhibited. > > >> > > >> Has anyone flown this configuration before? If so, any > > suggestions on how > > >> to hook it up? > > >> > > >> Thanks guys. > > >> > > >> -Rob > > >> > > >> _______________________________________________ > > >> altusmetrum mailing list > > >> [email protected] <mailto:[email protected]> > > >> http://lists.gag.com/mailman/listinfo/altusmetrum > > >> > > >> > > > > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: > > < > http://lists.gag.com/pipermail/altusmetrum/attachments/20160415/aa002ec6/attachment-0001.html > > > > > > ------------------------------ > > > > Message: 4 > > Date: Fri, 15 Apr 2016 09:37:09 -0700 > > From: Chris Attebery <[email protected] > > <mailto:[email protected]>> > > To: [email protected] <mailto:[email protected]>, Altus Metrum > > <[email protected] <mailto:[email protected]>> > > Subject: Re: [altusmetrum] Advice on wiring dual Telemetrums for > > arm/safe? > > Message-ID: > > > > < > cap5djdsnvxmzghc_d_nqyxxtkc45q43yapwutx_zkm+jq--...@mail.gmail.com > > <mailto: > cap5djdsnvxmzghc_d_nqyxxtkc45q43yapwutx_zkm%[email protected]>> > > Content-Type: text/plain; charset="utf-8" > > > > I'm pretty sure that NAR dropped that requirement. If your L3CC > is > > insisting I'd find another. > > > > I'm keeping my L3 wiring EXTREMELY simple. Both altimeters > > will be direct > > wired to the charges and use a screw switch to the enable > > pins. No safe > > switches, shunts, or terminal strips to intruduce points of > > failure. > > > > On Fri, Apr 15, 2016 at 9:23 AM, w9ya <[email protected] > > <mailto:[email protected]>> wrote: > > > > > Um, please check with your L3CC.....quite a few of them do > > NOT want you to > > > fly with switches in series with your charges !! > > > > > > Best regards; > > > > > > Bob F. > > > > > > On Fri, Apr 15, 2016 at 9:57 AM, Rob Derstadt > > <[email protected] <mailto:[email protected]>> wrote: > > > > > >> Hello, > > >> > > >> I'm trying to work out how to wire up the outputs of two > > Telemetrums (one > > >> primary, one backup) so that I can add an extra arm/disarm > > rotary switch > > >> between the outputs and the terminal blocks (the NAR L3 > > requirement to cut > > >> power completely from the pyro's). > > >> > > >> This is my initial wiring diagram: > > >> > > >> > > >> > > > https://github.com/robderstadt/NAR-L3-Project/blob/master/images/plans/GizmoXL_Wiring.png > > >> > > >> Normally I'd just *try* it and see what happens, but I > > don't want to fry > > >> two board if I get it wrong. I'm also concerned that in the > > "safe" position > > >> that the continuity indicator on each board would still > > indicate everything > > >> green, which could lead to a launch with the pyro's inhibited. > > >> > > >> Has anyone flown this configuration before? If so, any > > suggestions on how > > >> to hook it up? > > >> > > >> Thanks guys. > > >> > > >> -Rob > > >> > > >> _______________________________________________ > > >> altusmetrum mailing list > > >> [email protected] <mailto:[email protected]> > > >> http://lists.gag.com/mailman/listinfo/altusmetrum > > >> > > >> > > > > > > _______________________________________________ > > > altusmetrum mailing list > > > [email protected] <mailto:[email protected]> > > > http://lists.gag.com/mailman/listinfo/altusmetrum > > > > > > > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: > > < > http://lists.gag.com/pipermail/altusmetrum/attachments/20160415/8cfab391/attachment.html > > > > > > ------------------------------ > > > > Subject: Digest Footer > > > > _______________________________________________ > > altusmetrum mailing list > > [email protected] <mailto:[email protected]> > > http://lists.gag.com/mailman/listinfo/altusmetrum > > > > > > ------------------------------ > > > > End of altusmetrum Digest, Vol 64, Issue 1 > > ****************************************** > > > > > > > > _______________________________________________ > > altusmetrum mailing list > > [email protected] <mailto:[email protected]> > > http://lists.gag.com/mailman/listinfo/altusmetrum > > > > > > > > > > _______________________________________________ > > altusmetrum mailing list > > [email protected] > > http://lists.gag.com/mailman/listinfo/altusmetrum > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.gag.com/pipermail/altusmetrum/attachments/20160415/f62e82b8/attachment.html > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum > > > ------------------------------ > > End of altusmetrum Digest, Vol 64, Issue 4 > ****************************************** >
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