<div dir="ltr"><div class="gmail_default" style="font-family:comic sans ms,sans-serif">Assuming you only need 3V3, then you could just charge an 18650 LiPo with Resistor & Diode directly from solar panel,</div><div class="gmail_default" style="font-family:comic sans ms,sans-serif"><br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif"><b><font color="#e69138">Yes I know it is not the best solution, but if the solar panel is about the right 'power' O/P then it should be OK,</font></b></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif"><b><font color="#e69138">After all, that's how MOST solar security lights work.</font></b></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif"><br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif"><br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif">Assuming you are using something like a D1 mini, then you can probably just connect the LiPo directly across it's 5V input.</div><div class="gmail_default" style="font-family:comic sans ms,sans-serif"><br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif"><br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 17, 2020 at 2:54 PM E Ball <<a href="mailto:eba@ebassociates.co.uk">eba@ebassociates.co.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Thanks il check your answer out - I am using Arduino UNO Wi-fi Rev 2 <br><br><div dir="ltr"><div><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><span style="background-color:rgba(255,255,255,0)">Regards<u></u><u></u></span></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><u></u> <u></u></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><span style="background-color:rgba(255,255,255,0)">Eddie Ball<u></u><u></u></span></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><span style="background-color:rgba(255,255,255,0)">EBA Consulting Ltd<u></u><u></u></span></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><font color="#000000"><span style="background-color:rgba(255,255,255,0)"><a href="tel:+447767426142" dir="ltr" target="_blank">+44(0)7767426142</a><u></u><u></u></span></font></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><font color="#000000"><span style="background-color:rgba(255,255,255,0)"><a href="tel:+441554890300" dir="ltr" target="_blank">+44(0)1554890300</a><u></u><u></u></span></font></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><u></u> <u></u></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><font color="#000000"><span style="background-color:rgba(255,255,255,0)"><a href="http://www.ebassociates.co.uk" target="_blank">Visit Our Web Site</a><u></u><u></u></span></font></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><u></u> <u></u></p><p class="MsoNormal" style="margin:0cm 0cm 0.0001pt"><span style="background-color:rgba(255,255,255,0)"><span lang="EN-US"><a href="https://twitter.com/#!/eddieballeba" target="_blank"><span lang="EN-GB" style="text-decoration:none"><img border="0" width="74" height="72" id="gmail-m_-9166957501750107281Picture_x0020_1" alt="Twitter_logo 1"></span></a><a href="https://www.facebook.com/pages/EB-Associates/340230642758062?ref=ts&fref=ts" target="_blank"><span lang="EN-GB" style="text-decoration:none"><img border="0" width="140" height="84" id="gmail-m_-9166957501750107281Picture_x0020_2" alt="Facebook"></span></a></span><img border="0" width="275" height="68" id="gmail-m_-9166957501750107281Picture_x0020_3"></span></p></div><div><br></div>Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On 17 Jul 2020, at 14:31, Alice Mitchell <<a href="mailto:alice@swansea.hackspace.org.uk" target="_blank">alice@swansea.hackspace.org.uk</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span>On Fri, 2020-07-17 at 09:38 +0000, EBA Consulting Ltd wrote:</span><br><blockquote type="cite"><span>Hi</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>I have designed a system with 3 sensors (Temp,Light and level) they</span><br></blockquote><blockquote type="cite"><span>run from an Arduino- wifi unit. I have powered it using a 9v PP3</span><br></blockquote><blockquote type="cite"><span>battery.</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>The system will be located outside the property but in range of wi-</span><br></blockquote><blockquote type="cite"><span>fi.  There is no power so I would like to use a re-chargeable 9v</span><br></blockquote><blockquote type="cite"><span>battery connected to a solar panel to keep it topped up.</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>I am looking for help to provide a hardware design solution to</span><br></blockquote><blockquote type="cite"><span>achieve this</span><br></blockquote><span></span><br><span>I would be curious to know what Arduino board you are using, a lot of</span><br><span>the standard ones used a linear voltage regulator for the power supply</span><br><span>which will waste a lot of power and might make the power consumption</span><br><span>too high to be practical for long term solar power.</span><br><span></span><br><span>Have you seen projects like this one ?</span><br><span><a href="https://www.instructables.com/id/Solar-Powered-WiFi-Weather-Station-V20/" target="_blank">https://www.instructables.com/id/Solar-Powered-WiFi-Weather-Station-V20/</a></span><br><span></span><br><span>They use a Wemos D1 Mini as the microcontroller (its an ESP8266 dev</span><br><span>board), powered by a standard LiIon battery, connected to one of those</span><br><span>off the shelf lithium charging boards like we stock in the space and a</span><br><span>solar panel.</span><br><span></span><br><span>_______________________________________________</span><br><span>Hackspace mailing list</span><br><span><a href="mailto:Hackspace@swansea.hackspace.org.uk" target="_blank">Hackspace@swansea.hackspace.org.uk</a></span><br><span><a href="http://swansea.hackspace.org.uk/mailman/listinfo/hackspace" target="_blank">http://swansea.hackspace.org.uk/mailman/listinfo/hackspace</a></span><br></div></blockquote></div>_______________________________________________<br>
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