<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Depends on what you mean by "light". I've used the eLogger from Eagle Tree:</DIV>
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<DIV><A href="http://www.eagletreesystems.com/MicroPower/micro.htm">http://www.eagletreesystems.com/MicroPower/micro.htm</A></DIV>
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<DIV>But, seeing as how this is pattern, this will probably put a lot of planes over the weight limit. :-) The nice thing about the elogger is the data logging capability. With the external display, you can program it to display information about the flight as well (min voltage, max amps, mah consumed, etc).</DIV>
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<DIV>OTOH, a simple op-amp circuit and a bar graph LED display might do what you need.</DIV>
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<DIV>Bob R.</DIV>
<DIV><BR><BR>--- On <B>Wed, 8/5/09, James Oddino <I><joddino@socal.rr.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid"><BR>From: James Oddino <joddino@socal.rr.com><BR>Subject: [NSRCA-discussion] Airborne voltmeter<BR>To: "General pattern discussion" <nsrca-discussion@lists.nsrca.org><BR>Date: Wednesday, August 5, 2009, 1:28 PM<BR><BR>
<DIV class=plainMail><BR>Has anyone run across a small, light voltmeter that could be left in the plane wired across the input to the ESC? The idea is to make sure your pack is fully charged when you plug it into the ESC. It would need a range from 30 to 42 volts and needs a resolution of at least one volt. I want to see a difference between 38 and 41 volts.<BR><BR>Jim<BR>_______________________________________________<BR>NSRCA-discussion mailing list<BR><A href="http://us.mc11.mail.yahoo.com/mc/compose?to=NSRCA-discussion@lists.nsrca.org" ymailto="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</A><BR><A href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target=_blank>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</A><BR></DIV></BLOCKQUOTE></td></tr></table>