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<title>Motor Testing: Static and In-Flight Motor Performance Testing</title>
<div class="details">
<span id="author" class="author">Bdale Garbee</span><br>
<span id="email" class="email"><a href="mailto:bdale@gag.com">bdale@gag.com</a></span><br>
-<span id="revnumber">version v1.9.9,</span>
-<span id="revdate">06 Oct 2021</span>
+<span id="revnumber">version v1.9.12,</span>
+<span id="revdate">28 Oct 2022</span>
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<div id="toc" class="toc">
<div id="toctitle">Table of Contents</div>
<h2 id="_license">License</h2>
<div class="sectionbody">
<div class="paragraph">
-<p>Copyright © 2021 Bdale Garbee and Keith Packard</p>
+<p>Copyright © 2022 Bdale Garbee and Keith Packard</p>
</div>
<div class="paragraph">
<p>This document is released under the terms of the <a href="http://creativecommons.org/licenses/by-sa/3.0/">Creative Commons ShareAlike 3.0 License</a></p>
can always be improved… If you have questions that aren’t answered in this
manual, or just need a little help figuring things out, we strongly suggest
joining the Altus Metrum user email list, which you can do by visiting
-<a href="https://lists.gag.com/mailman/listinfo/altusmetrum" class="bare">https://lists.gag.com/mailman/listinfo/altusmetrum</a>.</p>
+<a href="https://lists.gag.com/mailman3" class="bare">https://lists.gag.com/mailman3</a>.</p>
</div>
</div>
</div>
<h3 id="_power_switch_and_battery">3.1. Power Switch and Battery</h3>
<div class="paragraph">
<p>In addition to the circuit board itself, EasyMotor needs
-a power switch and battery to operate. Unlike most other
-Altus Metrum products, EasyMotor does not work with
-single-cell LiPo batteries. That’s because commonly
-available inexpensive pressure sensors need 5V, which is
-more than a single-cell LiPo provides. Any battery that
-provides from 6.5 to about 15 volts should work. Good
-choices are the common 9V alkaline battery, or the very
-small and light A23 12V alkaline batteries.</p>
+a power switch and battery to operate. Like many Altus
+Metrum products, EasyMotor requires a single-cell LiPo
+battery, and has an on-board charging circuit. The 5V
+needed for inexpensive pressure sensors is generated
+onboard using a switching regulator to boost the voltage.</p>
</div>
<div class="paragraph">
<p>Because he often mounts EasyMotor to the motor’s forward
by the sensor. Very inexpensive sensors that have a
“1/8 NPT” threaded input, a “Buick-style” 3-pin connector,
and typically ship with a short cable and mating
-connector, are readily available on eBay and AliExpress.</p>
+connector, are readily available through various vendors
+including Amazon, eBay, and AliExpress.</p>
</div>
<div class="paragraph">
<p>To log in-flight chamber pressure, a typical approach
the pressure sensor, and attach the sensor leads to
EasyMotor.</p>
</div>
+<div class="paragraph">
+<p>If you aren’t up for machining closures yourself,
+<a href="http://lokiresearch.com">Loki Research</a> sells
+54mm and 75mm "experimental bulkheads" with threaded
+sensor ports that can be used with snap ring cases.</p>
+</div>
</div>
</div>
</div>
</div>
<div class="paragraph">
<p>After flight, AltosUI can be used to download the flight data,
-then export it to a comma separated values (CSV) file. Such a
-file can easily be loaded into a spreadsheet for analysis.</p>
+view a quick graph of acceleration and pressure with pan and
+zoom capabilities, then export it to a comma separated values
+(CSV) file. Such a file can easily be loaded into a spreadsheet
+for analysis.</p>
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<div id="footer">
<div id="footer-text">
-Version v1.9.9<br>
-Last updated 2021-10-07 00:16:13 -0600
+Version v1.9.12<br>
+Last updated 2022-10-28 23:33:07 -0600
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