diff options
| author | Keith Packard <keithp@keithp.com> | 2012-12-15 14:47:22 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2012-12-15 14:47:22 -0800 |
| commit | 4925a6f2f4edd5b54641a5240030e5c0e3e95db6 (patch) | |
| tree | 165987ef052c01853a4324a65a4b4607c3c49258 | |
| parent | 6fa1ec0dbf2a4eda8d061c67b3779b83b88f29f0 (diff) | |
doc: Add paragraph noting differences in JST polarity
Looks like the 'standard' polarity for 3.7V lipos using JST connectors
in RC aircraft is swapped from what Spark Fun uses. Note that in the
docs to try and keep people from wrecking hardware.
Signed-off-by: Keith Packard <keithp@keithp.com>
| -rw-r--r-- | doc/altusmetrum.xsl | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/doc/altusmetrum.xsl b/doc/altusmetrum.xsl index b2677a02..aa218c5c 100644 --- a/doc/altusmetrum.xsl +++ b/doc/altusmetrum.xsl @@ -278,6 +278,17 @@ NAR #88757, TRA #12200 designed for use with single-cell batteries with 3.7 volts nominal. </para> <para> + The battery connectors are a standard 2-pin JST connector and + match batteries sold by Spark Fun. Other vendors sell similar + batteries for RC aircraft using mating connectors, however the + polarity for those is generally reversed from the batteries used + by Altus Metrum products. In particular, the Tenergy batteries + supplied for use in Featherweight flight computers are not + compatible with Altus Metrum flight computers or battery + chargers. <emphasis>Check polarity before connecting any battery + not purchased from Altus Metrum or Spark Fun.</emphasis> + </para> + <para> By default, we use the unregulated output of the Li-Po battery directly to fire ejection charges. This works marvelously with standard low-current e-matches like the J-Tek from MJG Technologies, and with @@ -2199,7 +2210,7 @@ NAR #88757, TRA #12200 </listitem> <listitem> <para> - RF interface for battery charging, configuration, and data recovery. + RF interface for configuration, and data recovery. </para> </listitem> <listitem> |