Search found 334 matches

by cottonpickers
Wed Jan 21, 2015 12:02 pm
Forum: I want one! [Sales threads]
Topic: FS: Solar Charger & Battery Pack for the Raspberry Pi-Ver 9
Replies: 149
Views: 40318

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

Hi, 24x7 is too hard with solar unless you get a really big panel or really cut back on peripherals. This is main reason for getting a timer so you can switch off at night or only on at set times each day. 1.5amp an hour is still only 6amps in 4 hours good sun in winter. Ideally get a rapberry Pi A+...
by cottonpickers
Wed Jan 14, 2015 6:32 pm
Forum: I want one! [Sales threads]
Topic: FS: Solar Charger & Battery Pack for the Raspberry Pi-Ver 9
Replies: 149
Views: 40318

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

The USB ports and Plugs are both input and output. You can connect any input from one panel set to any output of another. Normally I connect the red 'output' lead on the right to the yellow input port on the top or bottom. If you connect a bare panel it will speed up charging. If you connect a bare ...
by cottonpickers
Sun Dec 28, 2014 8:00 pm
Forum: Solar Chargers
Topic: lithium-ion solar charger
Replies: 2
Views: 4011

Re: lithium-ion solar charger

I use Linear LTC4054 chips. They are *so* simple and very safe - they use CC / CV with thermal limiting and even a 'pre charge' setting for deeply discharged cells. A cheap Chinese alternative is the TP4054 chip - very similar but 'looser' on the specs. I can happily send you a couple TP4054 chips i...
by cottonpickers
Sun Dec 28, 2014 7:56 pm
Forum: Raspberry Pi Project Discussions
Topic: Re: Discuss: Solar Charger & battery pack for the Raspberry
Replies: 152
Views: 58173

Re: Discuss: Solar Charger & battery pack for the Raspberry

Yes, A+ is certainly the most power sipping of the models. However if you are just taking one photo a day then I most definitely suggest the timer is the solution. You could even dispense with the solar panel altogether (or get a small one) 10 mins juice a day will last for weeks on a single set of ...
by cottonpickers
Sun Dec 28, 2014 7:54 pm
Forum: Battery Charging Discussion
Topic: Running RPi on Solar Panel and battery
Replies: 1
Views: 3940

Re: Running RPi on Solar Panel and battery

Hi, The pi can actually take a range of voltages. I've tested it down to 4.0v and up to 6v (the circuits are mainly 3.3v inside) 1.2amps is huge and I don't think it will need all this juice. A raspberry B+ is abot 200ma and you should be able to get dongles that are not so power hungry. One option ...
by cottonpickers
Mon Dec 15, 2014 7:43 pm
Forum: I want one! [Sales threads]
Topic: FS: Solar Charger & Battery Pack for the Raspberry Pi-Ver 9
Replies: 149
Views: 40318

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

Hi Yann! -OK so I'm happy to say that the B+ box is ready :-) I can include in the Ver 7 or Ver 9 or combo box - just need people to let me know its the B+ and not B that is needed.
See here for pics of it http://www.ebay.co.uk/itm/291312854632? ... 1561.l2649
by cottonpickers
Sat Nov 15, 2014 9:19 pm
Forum: Solar Chargers
Topic: Folding Solar Solutions
Replies: 17
Views: 24824

Re: Folding Solar Solutions

Hi, the quad box does have protection against over charge and under charge. Email is more responsive as I check email daily but log in here every other day or so :)
by cottonpickers
Fri Oct 24, 2014 6:09 am
Forum: Solar Chargers
Topic: Folding Solar Solutions
Replies: 17
Views: 24824

Re: Folding Solar Solutions

I like your ideas - particularly on series / parallel . I've got numerous drawings on how (not) to achieve this, but I agree that it would be very cool to achieve that. Currently I do it 'externally' by using a 'combining' lead for USB voltage or for car cigar voltage. I'm interested to see how your...
by cottonpickers
Fri Oct 24, 2014 6:06 am
Forum: I want one! [Sales threads]
Topic: FS: Solar Charger & Battery Pack for the Raspberry Pi-Ver 9
Replies: 149
Views: 40318

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

Yes, these are all linkable (so you could put three together to increase battery storage and also increase Sun capturing. Yes, I've got a pi B+ on order so will post here when I've completed the new case!
by cottonpickers
Tue Oct 21, 2014 6:34 am
Forum: Solar Chargers
Topic: Folding Solar Solutions
Replies: 17
Views: 24824

Re: Folding Solar Solutions

If you need something small, I would suggest my 'mini' folder. It uses 2x 500ma panels so can provide 1amp from the single usb port. SIze is 19x18cm and weighs just 250g. This is $44 shipped to the US. I would then suggest adding an empty 2xcell battery store/charger ($15) to both charge the cells a...

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