<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On May 11, 2015, at 5:59 PM, Burr Sutter <<a href="mailto:burrsutter@gmail.com" class="">burrsutter@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><br class=""><div class="gmail_extra"><br class=""><div class="gmail_quote">On Mon, May 11, 2015 at 1:25 PM, Chip McClelland via TriEmbed <span dir="ltr" class=""><<a href="mailto:triembed@triembed.org" target="_blank" class="">triembed@triembed.org</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div style="word-wrap:break-word" class="">To all, <div class=""><br class=""></div><div class="">I won’t be able to make the meeting tonight (darn day job!). But, I wanted to share the board, designs and software for that solar power management board I talked about at the last meeting. Details and link <a href="https://twitter.com/chipmc86/status/597811201230376961" target="_blank" class="">here</a>. Here is the punch-line: On a 2000mAH LiPo battery, I can keep my cellular data logger fully charged and reporting hourly with only 3 hours of sunlight a week. Not bad.</div></div></blockquote><div class="">That sounds awesome</div><div class="">how often do we have whole weeks with zero sunlight? :-) </div></div></div></div></div></blockquote><br class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote"><div class="">My thoughts exactly, I guess shade counts too so I need to place this in a good spot.</div></div></div></div></div><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote"><div class=""> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><div class=""><br class=""></div><div class="">Based on the overwhelming feedback from the last meeting, I have also purchased a big 8AH 12V Sealed Lead Acid battery and started a run down test. If you are at all interested, I you can watch the current status <a href="http://app.ubidots.com/ubi/getchart/page/fwweXqpV5QlRbiZ8nzEvou4nNi8" target="_blank" class="">here</a>. So far so good with almost 24 hours dropping the battery from 13.12 to 13.07. From what I <a href="http://www.solarnavigator.net/battery_charging.htm" target="_blank" class="">have read</a> I need to stop the test once the battery gets to 11.9 - this could take a while.</div></div></blockquote><div class=""><br class=""></div><div class="">I have heard those are relatively inexpensive. The boaters and RV enthusiasts apparently have them. I am looking for a solution to power a "pond pump" to keep a tiny water fall/filter system working. Where did you pick up the battery from? </div></div></div></div></div></blockquote><div><br class=""></div><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote"><div class="">From Amazon,<a href="http://www.amazon.com/gp/product/B0009GIKNE/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1" class="">here</a> is what I ordered.</div></div></div></div></div><blockquote type="cite" class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote"><div class=""> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><div class=""> Based on this test, I may need to invest in a 12V solar panel and charger as well. </div></div></blockquote><div class=""><br class=""></div><div class="">Do you feel you need both solutions for your data logger? </div></div></div></div></blockquote><br class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote"><div class="">Not sure, but - again - from what I read, slowly and deeply discharging a sealed lead acid battery can damage it. In fact, in <a href="http://www.batteryweb.com/manuals/techman.pdf" class="">all the discharge curves</a>, they don’t show anything less than 0.05C which yellds a 20 hour discharge. Not sure how this battery will stand up to a slow discharge over weeks or months. So, Solar may be needed to keep it topped off for long life. Any thoughts from the group on this?</div></div></div></div><div><br class=""></div>Thanks for the interest in this project.<br class=""><blockquote type="cite" class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote"><div class=""> <br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><div class=""><br class=""></div><div class="">Thanks again for all your help and advice. Sorry I will miss the meeting tonight - I always end up learning something.</div><span class=""><font color="#888888" class=""><div class=""><br class=""></div><div class="">Chip</div><div class=""><br class=""></div><div class=""><br class=""></div></font></span></div><br class="">_______________________________________________<br class="">
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