Makefiles, too

[fw/altos] / doc / installation.inc

diff --git a/doc/installation.inc b/doc/installation.inc
index 444332981d1001b0e61c54e7e5e987adfbf0552a..273b435bda80c5c63dd51c2a1b53833e467b16a6 100644 (file)
--- a/doc/installation.inc
+++ b/doc/installation.inc
@@ -5,11 +5,13 @@
        power on/off, and two pairs of wires connecting e-matches for the
        apogee and main ejection charges.  All Altus Metrum products are
        designed for use with single-cell batteries with 3.7 volts
-       nominal. TeleMini v2.0 and EasyMini may also be used with other
+       nominal.
+       EasyMini may also be used with other
        batteries as long as they supply between 4 and 12 volts.
 
-       The battery connectors are a standard 2-pin JST connector and
-       match batteries sold by Spark Fun. These batteries are
+       The battery connectors are a standard 2-pin JST connector; you
+       can purchase suitable batteries from the any vendor selling
+       Altus Metrum products. These batteries are
        single-cell Lithium Polymer batteries that nominally provide 3.7
        volts.  Other vendors sell similar batteries for RC aircraft
        using mating connectors, however the polarity for those is
@@ -20,26 +22,41 @@
 
        [WARNING]
        Check polarity and voltage before connecting any battery not
-       purchased from Altus Metrum or Spark Fun.
+       purchased from Altus Metrum.
 
-       By default, we use the unregulated output of the battery directly
-       to fire ejection charges.  This works marvelously with standard
-       low-current e-matches like the J-Tek from MJG Technologies, and with
-       Quest Q2G2 igniters.  However, if you want or need to use a separate
-       pyro battery, check out the “External Pyro Battery” section in this
-       manual for instructions on how to wire that up. The altimeters are
-       designed to work with an external pyro battery of no more than 15 volts.
+       [WARNING]
+       Spark Fun sells batteries that have a matching connector with
+       the correct polarity. However, these batteries include an
+       integrated current limiting circuit. That circuit will cause
+       the battery to shut down when firing the igniter circuit. Do
+       not use these batteries unless you remove the current limiting
+       circuit.
+
+       By default, we use the unregulated output of the battery
+       directly to fire ejection charges.  This works marvelously
+       with standard low-current e-matches like the J-Tek from MJG
+       Technologies, and with Quest Q2G2 igniters.  However, if you
+       want or need to use a separate pyro battery, check out
+       <<_using_a_separate_pyro_battery>> for instructions on how to wire
+       that up. The altimeters are designed to work with an external
+       pyro battery of no more than 15 volts.
 
        Ejection charges are wired directly to the screw terminal block
        at the aft end of the altimeter.  You'll need a very small straight
        blade screwdriver for these screws, such as you might find in a
        jeweler's screwdriver set.
+       ifndef::telemini[]
+       The screw terminal block is also used for the power switch leads.
+       endif::telemini[]
 
+       ifdef::telemini[]
        Except for TeleMini v1.0, the flight computers also use the
        screw terminal block for the power switch leads. On TeleMini v1.0,
        the power switch leads are soldered directly to the board and
        can be connected directly to a switch.
+       endif::telemini[]
 
+       ifdef::radio[]
        For most air-frames, the integrated antennas are more than
        adequate.   However, if you are installing in a carbon-fiber or
        metal electronics bay which is opaque to RF signals, you may need to
@@ -48,3 +65,4 @@
        and, on TeleMetrum v1, you can unplug the integrated GPS
        antenna and select an appropriate off-board GPS antenna with
        cable terminating in a U.FL connector.
+       endif::radio[]