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

cottonpickers wrote:Here is a Solar and Battery unit suitable for the Raspberry Pi.

Its a neat way to power your Raspberry Pi:

1. You can power your Pi directly from the sun using the solar panel and 4 x nimh batteries (not supplied) which act as a 'buffer' if the sun goes in

2. or... You can let the sun charge the batteries using the solar panel during the day and then switch on your Pi when you want to use it. - great to use free energy.

Of course, you can use the solar battery pack to power other Micro USB devices but the size of this panel is just perfect for the Pi and would form the nice basis for making a Solar Pi Project box.

This is a hand made unit not a professionally made device! - I made one for myself and find it very handy that I thought others might be interested. As you can see it includes a nice box to put the pi into - a great snug fit with holes made for the external connectors.

The panel supplies a little over 300ma (so for 3000mah nimh batteries means that it is charging at a perfect C/10) and has blocking diodes to prevent battery discharge.

Typical Pi version B users are finding that they are using about 400ma an hour with various keyboards, mice, network and TV plugged in and running, so when in full sun it could run from mainly solar and when the sun goes in the batteries will seamlessles take over. Even using much lower capacity AAA cells (which also fit) my kids played on Scratch for over an hour and half in the dark with juice to spare at the end. AA cells hold about 3 times as much energy so you should have plenty of power.

The panel is large enough to charge 3000ma AA nimh batteries in under 10 hours or my smaller 750ma nimh AAA cells in under 3 hours. So you could leave in the sun in the day, and use the Pi in the evening.

The Raspberry Pi and Batteries are not included, but the micro USB lead obviously is.

This model has a
* Switch so you don't have to keep pulling the lead out to swich it off (but switching it off won't stop the batteries being charged)
* Blue LED so you can see when the batteries are being charged by the sun
* USB Socket so you can charge other USB devices like phones. Add $5 or £3 if you need added Apple circuitry to charge ipods/phones/pads
* USB Lead, so in winter you can just plug the lead in to a USB socket to charge the batteries (won't fully charge them this way) and run the pi when the batteries are flat and theres no sun

This model is also 'Linkable' If you buy 2 units and connect them together you can use twice the
solar panels capability and twice the storage capacity.
Image




To order, just click the appropriate link below. This will take you to Paypal. You can pay by Paypal, or if you don't have a paypal account, you can still pay by credit card without having to sign up to Paypal:


Click here : Price Including postage: £24.99 to UK
Click here : Price including postage: £27.99 to EU
Click here : USA or any other part of the world where you prefer to pay in USD, Postage included -$49

If you also want confirmation when its posted, please just post a short reply to here with a note saying payment sent and include your forum name in the paypal note field, I'll then reply here when its in the post box.

If you want to contact me outside of this forum, or pay for anything specific not mentioned, my email address and paypal address is:Image

-----------


Great work..I have been trying to get portable solar charger for my car.. I love to go to long trips and this seems best way to get portable charger.

Schwabinger
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Joined: Sat Nov 30, 2013 8:44 am

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:

http://www.mightyohm.com/forum/viewtopic.php?f=2&t=3420
http://www.flickr.com/photos/rigasw/sets/72157632507768131/with/8541691360/

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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Joined: Thu Dec 19, 2013 1:00 am

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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