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-   -   Solar Charging / Solar Charger for the N900 via car charger - Tested / Works (https://talk.maemo.org/showthread.php?t=46525)

besides 2010-03-04 23:08

Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
3 Attachment(s)
link to 1W solar panel used: http://tinyurl.com/yz2pz3z

Got this on sale for $15 a while back and assumed, correctly it seems, that it would work with the N900 as it had worked with the E71.

lowang35 2010-03-04 23:39

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
Is it actually able to charge the tablet while it,s on? :p... It could be quite usefull though... If you were going on some sort of survval trip for a couple of days :)

besides 2010-03-05 01:17

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
Yes, the N900 was on.

I was looking for a way to charge it, or at least keep it on, while on a lengthy bike trip involving roughly 8 hours of riding per day.

somedude 2010-03-05 01:22

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
I would love to see some company come up with a back cover with solar panel on it, or a touch charger like how the energizer has for wii remotes.

besides 2010-03-05 01:42

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
here's an amateur video of the whole affair:
http://www.youtube.com/watch?v=OCool6aqub8

anapospastos 2010-03-09 09:34

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
Can you describe exactly what you did? Which cables u connected and where? A closer photo would be nice:D

ossipena 2010-03-09 09:46

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
Quote:

Originally Posted by anapospastos (Post 560931)
Can you describe exactly what you did? Which cables u connected and where? A closer photo would be nice:D

you can see it "clearly" from the pictures. just look harder and atleast try.

e: hint: these ingredients can be seen:

http://img.diytrade.com/cdimg/182495...OLAR_PANEL.jpg
solar panel

http://www.blueunplugged.com/dbimgs/ICC_8600-PROD.jpg
car charger

http://www.motorcycle-superstore.com...r_Clamp_--.jpg
alligator clamps

anapospastos 2010-03-09 09:50

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
Quote:

Originally Posted by ossipena (Post 560946)
you can see it "clearly" from the pictures. just look harder and atleast try.

Ok I was wondering if there is a much more "stable" edition:p. In the other hand, is it dangerous for n900? If there is greater sun or something like that. Here in Greece we ve got a hoooot sun.

ossipena 2010-03-09 09:52

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
Quote:

Originally Posted by anapospastos (Post 560951)
Ok I was wondering if there is a much more "stable" edition:p. In the other hand, is it dangerous for n900? If there is greater sun or something like that. Here in Greece we ve got a hoooot sun.

it shouldn't be dangerous: solar panels have maximum voltage that they don't exceed at any conditions (unless you plug 230V AC for example to the contacts from electric grid....). current etc is handled by the car charger and it is as dangerous as charging your n900 from cars plug.

anapospastos 2010-03-09 10:01

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
Quote:

Originally Posted by ossipena (Post 560954)
it shouldn't be dangerous: solar panels have maximum voltage that they don't exceed at any conditions (unless you plug 230V AC for example to the contacts from electric grid....). current etc is handled by the car charger and it is as dangerous as charging your n900 from cars plug.

Ok thanks for your answer. Im expecting from besides to report here if he met conflict or a problem and how long is he using it.

That One Guy 2010-03-09 10:16

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
One Watt at 12 V (I presume, since you have a car charger clipped to it)?

That would yield you 0.083amps. That's less than 1/10th of an amp. 1100mA less than what the N900 calls for.

1 watt/12 volts = 0.08333333 amps.

That solar panel has to have a higher rating than one watt.

anapospastos 2010-03-09 11:21

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
How long it takes you to fully charge the n900?

ossipena 2010-03-09 12:01

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
Quote:

Originally Posted by anapospastos (Post 561042)
How long it takes you to fully charge the n900?

if that one guy's speculations are correct, that does never get the battery fully charged (unless battery is charged while device is off)

anapospastos 2010-03-09 13:59

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
This is gonna work? A little expensive but it is very convenient.

ossipena 2010-03-09 14:09

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
Quote:

Originally Posted by anapospastos (Post 561199)
This is gonna work? A little expensive but it is very convenient.

of course it depends how the car charger deals with the voltage. but even with plain regulator driving everything above 5v to resistor is good enough if 12V 6,5W is supplied. it is a bit better than charging via usb port when sunlight is optimal

besides 2010-03-11 04:38

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
I never had a constant supply of sunshine to thoroughly test this arrangement at length, but I would hope that it at least provides some power so the battery depletes less quickly.

The scenario I envisioned involved attaching the panel to a bicycle while on a 6-8 hour daily ride. The N900 would be used for music and GPS, when the latter will be fully functional :(

Wichall 2010-03-12 12:36

Re: Solar Charging / Solar Charger for the N900 via car charger - Tested / Works
 
What's wrong with the PowerMonkey eXplorer?...

Works perfectly, used it whilst travelling earlier this year.


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