From 5b1bd4f87f682c1956e173a27414ceb076b20ceb Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Wed, 5 Feb 2020 11:46:36 -0700 Subject: [PATCH] update info on using separate pyro batteries to encourage including a switch --- doc/easymega.inc | 9 ++++++--- doc/easymini-device.inc | 6 ++++-- doc/telemega.inc | 9 ++++++--- doc/telemetrum.inc | 11 ++++++----- doc/telemini.inc | 14 ++++++++------ doc/usage.inc | 9 ++++++++- 6 files changed, 38 insertions(+), 20 deletions(-) diff --git a/doc/easymega.inc b/doc/easymega.inc index a948aaae..506f4c5f 100644 --- a/doc/easymega.inc +++ b/doc/easymega.inc @@ -97,9 +97,12 @@ EasyMega provides explicit support for an external pyro battery. All that is required is to remove the jumper between the lipo terminal (Bottom 3) and the pyro terminal - (Bottom 2). Then hook the negative pyro battery terminal to ground - (Bottom 1) and the positive pyro battery to the pyro battery - input (Bottom 2). You can then use the existing pyro screw + (Bottom 2). Then hook the negative pyro battery terminal to + ground (Bottom 1) and the switched positive pyro battery to + the pyro battery input (Bottom 2). Note that you must include + a switch between the pyro battery and the board for safety, + as the on-board power switch circuit only supports the primary + battery! You can then use the existing pyro screw terminals to hook up all of the pyro charges. === Using Only One Battery With EasyMega diff --git a/doc/easymini-device.inc b/doc/easymini-device.inc index 82ea959c..b7af82f2 100644 --- a/doc/easymini-device.inc +++ b/doc/easymini-device.inc @@ -94,9 +94,11 @@ ground, connect it to the negative external battery connection, top terminal 4. - Connecting the positive battery terminal to the pyro + Connecting the switched positive battery terminal to the pyro charges must be done separate from EasyMini, by soldering - them together or using some other connector. + them together or using some other connector. Note that for + safety, you should put a switch between the pyro battery and + the rest of the circuit! The other lead from each pyro charge is then inserted into the appropriate per-pyro channel screw terminal (top diff --git a/doc/telemega.inc b/doc/telemega.inc index 0975172f..092077e0 100644 --- a/doc/telemega.inc +++ b/doc/telemega.inc @@ -109,9 +109,12 @@ TeleMega provides explicit support for an external pyro battery. All that is required is to remove the jumper between the lipo terminal (Bottom 3) and the pyro terminal - (Bottom 2). Then hook the negative pyro battery terminal to ground - (Bottom 1) and the positive pyro battery to the pyro battery - input (Bottom 2). You can then use the existing pyro screw + (Bottom 2). Then hook the negative pyro battery terminal to + ground (Bottom 1) and the switched positive pyro battery to + the pyro battery input (Bottom 2). Note that you must include + a switch between the pyro battery and the board for safety, + as the on-board power switch circuit only supports the primary + battery! You can then use the existing pyro screw terminals to hook up all of the pyro charges. === Using Only One Battery With TeleMega diff --git a/doc/telemetrum.inc b/doc/telemetrum.inc index 3247db95..7ef9876f 100644 --- a/doc/telemetrum.inc +++ b/doc/telemetrum.inc @@ -62,14 +62,15 @@ stranded, into the GND hole just above the screw terminal strip and solder it in place. - Connecting the positive battery terminal to the pyro + Connecting the switched positive battery terminal to the pyro charges must be done separate from TeleMetrum, by soldering - them together or using some other connector. - + them together or using some other connector. Note that you + must include a switch in the positive lead from the pyro + battery for safety! The other lead from each pyro charge is then inserted into - the appropriate per-pyro channel screw terminal (terminal 4 for the - Main charge, terminal 6 for the Apogee charge). + the appropriate per-pyro channel screw terminal (terminal 4 + for the Main charge, terminal 6 for the Apogee charge). === Using an Active Switch with TeleMetrum diff --git a/doc/telemini.inc b/doc/telemini.inc index b7b26a8a..03732b2a 100644 --- a/doc/telemini.inc +++ b/doc/telemini.inc @@ -62,11 +62,11 @@ As described above, using an external pyro battery involves connecting the negative battery terminal to the flight - computer ground, connecting the positive battery terminal to - one of the igniter leads and connecting the other igniter - lead to the per-channel pyro circuit connection. Because - there is no solid ground connection to use on TeleMini, this - is not recommended. + computer ground, connecting the switched positive battery + terminal to one of the igniter leads and connecting the other + igniter lead to the per-channel pyro circuit connection. + Because there is no solid ground connection to use on + TeleMini, this is not recommended. The only available ground connection on TeleMini v3 are the two mounting holes next to the telemetry @@ -75,7 +75,9 @@ Connecting the positive battery terminal to the pyro charges must be done separate from TeleMini v3, by soldering - them together or using some other connector. + them together or using some other connector. Note that you + must include a switch in the pyro battery positive lead for + safety! The other lead from each pyro charge is then inserted into the appropriate per-pyro channel screw terminal (terminal 3 for the diff --git a/doc/usage.inc b/doc/usage.inc index dd795bdd..68d08bad 100644 --- a/doc/usage.inc +++ b/doc/usage.inc @@ -297,7 +297,8 @@ To use a separate pyro battery, connect the negative pyro battery terminal to the flight computer ground terminal, - the positive battery terminal to the igniter and the other + the the switched positive battery terminal to the igniter + and the other igniter lead to the negative pyro terminal on the flight computer. When the pyro channel fires, it will complete the circuit between the negative pyro terminal and the ground @@ -305,6 +306,12 @@ to hook this up for each flight computer will be found in the section below for that flight computer. + Note that you must include a switch in the positive lead of + the pyro battery for safety, as the on-board power switch + circuit on our product only controls current flow from the + the primary or system battery! + + === Using a Different Kind of Battery EasyMini -- 2.30.2