FS: Solar Charger & Battery Pack for the Raspberry Pi- Ver 7

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cottonpickers
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby cottonpickers » Sun Sep 29, 2013 1:45 pm

Jowi: Thank you sir! It went in the post earlier today. :D


OscarMurray
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby OscarMurray » Wed Nov 06, 2013 7:03 am


Schwabinger
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby Schwabinger » Sat Nov 30, 2013 8:48 am

I ordered mine tonight. My plan is to use it in my RaspRadio project:




Greetings from Munich!

Schwabinger

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cottonpickers
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby cottonpickers » Mon Dec 02, 2013 7:26 am

Greetings! Sounds like a fun project - I'm guessing you still need to be in wifi range to use? Even if solar powered/charged? Just wandering if you could somehow record to make it more portable?? Anyway sounds great and a perfect pi project.
The case printed last night and I'll finish it tonight for posting later today or first thing tomorrow. PayPal will email you when I've posted it :)

hax
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby hax » Fri Dec 06, 2013 10:38 am

Great idea! Payment ready, pls notify when ready..

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cottonpickers
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby cottonpickers » Sun Dec 08, 2013 9:42 pm

Hax: it's in the post :)

zorann
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby zorann » Thu Dec 19, 2013 1:03 am

I ordered one. Regards from Slovenia.

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cottonpickers
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby cottonpickers » Sat Dec 21, 2013 5:43 pm

zorann: Thanks! it went in the post day before yesterday :-) all the best

pinthenet
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby pinthenet » Tue Dec 24, 2013 4:00 pm

Hi all
I received my Ver 7 about a week ago and after some experimentation I get the impression that it's not charging the batteries, even thought the blue led indicates charging.....
Initially I only had 2100mAh batteries, which I thought was the problem, but today I installed fully-charged 2850mAh batteries and after 4.5 hours in the sunlight the pi switched off (battery out <4v).

I am only setting the unit outside on a table 'in the sun' at the moment, is there an easy way to check the charging current? I plan to install a switching regulator as described here http://www.daveakerman.com/?page_id=1294 but I want to be sure everything works on the solar side. I will also look for 3000mah or even 3500mah for the final setup.

I have a Type A pi with a WiFi dongle. I disabled PAL/HDMI as mentioned in the link.

(I just checked the battery voltage again and found it was above 4.5v again, but when I connected & switched on the pi it dropped to just 2 or 3V)

Thanks for any advice. Perhaps I'm expecting too much with my setup at the moment? My aim is to have a unit outside initially measuring temperatures in a greenhouse and fishpond using DS18B20s (1-wirw), then proceed from there. I also have 3 normally-powered Typ B PIs performing various tasks around the house

John

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cottonpickers
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Re: FS: Solar Charger & Battery Pack for the Raspberry Pi- V

Postby cottonpickers » Wed Dec 25, 2013 10:08 pm

There's a few things we can test. 4.5 hours is about right from fully charged batteries with a ver B and wifi dongle. You should get 6hrs plus or more in the sun with your more efficient ver A. I got over 4 running texys TFT at the same time...
Is the dongle warm? It might be very inefficient. Some use only 40ma where others use 400ma. You could try removing the dongle and testing runtime from a full charge. Another test is to try running the pi without any batteries at all. In good sun you should see it light up and even boot up and run - but you need good sun in winter to achieve this. Are you in the uk? As I find sun is very week from nov to mar. The best test is... You can test the actual charge into the batteries using a £6 multimeter. Just set it to ma (milliamperes) and link it in the chain between the last battery and the contact. Battery--red lead of multimeter---black lead of multimeter---battery holder terminal. You need to face the sun to get the highest charge.


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