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<div dir="ltr" data-setdir="false">I took a quick look on aliexpress.com There are solar/battery combinations, ready made, with various current capabilities.</div><div dir="ltr" data-setdir="false">Brian</div><div><br></div>
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On Saturday, 3 May 2025 at 13:06:30 CEST, Bernard Czenkusz via Bradford <bradford@mailman.lug.org.uk> wrote:
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<p>Hi guys,</p>
I've found that Raspberry Pi 5 has a ‘low power’ feature plus an
in-built Real Time Clock, which has a ‘wake up’ capability. A
'Seconds to wake up' value can be inserted into a file which is read
on going low power (Linux ‘shutdown’ but retaining power to the
board). After the given seconds, the board powers up again.<br>
<br>
This suggests a time lapse project. I would like to take a mid-day
photo of an apple tree I have, throughout a year, to stitch in a
film showing snow on bare tree, spring blossom, leafing up, growing
apples, falling leaves. But due to the difficulty of getting power
to the garden, I’m thinking of a Solar panel plus battery with
raspberry pi with camera, all boxed up and mounted.<br>
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So the Pi would be in low-power mode apart from a brief mid-day
on-time for the photo, plus a possible evening on-time period to
give myself a chance to connect and pull down photo’s or do any
changes - hopefully this would make the solar/battery combo
possible.<br>
<p>I'll be having a go at a script to do timed power ups/downs, but
I've not given much thought to anything else such as:</p>
<ul>
<li>Solar panel, battery, power management.</li>
<li>I should be able to get wifi to the garden, but may need an
external antenna if the boxing is a problem.</li>
<li>Which camera/lens, and its protection: glass covering or naked
lens.</li>
<li>The physical box and mount.</li>
<li>Should the pi monitor voltage, (if possible), provide
warnings, auto send any data?</li>
<li>The RTC can also have a small battery backup in case external
power fails, probably needed. <br>
</li>
</ul>
<p>I'd be interested in any suggestions, or if anyone has any
experience with Pi cameras, solar panels and batteries. Perhaps
something to discuss at the next meet?</p>
<p>Cheers</p>
<p> Bernie<br>
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</div>-- <br>Bradford mailing list<br><a href="mailto:Bradford@mailman.lug.org.uk" rel="nofollow" target="_blank">Bradford@mailman.lug.org.uk</a><br><a href="https://mailman.lug.org.uk/mailman/listinfo/bradford" rel="nofollow" target="_blank">https://mailman.lug.org.uk/mailman/listinfo/bradford</a><br></div>
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