Active Topics

 


Reply
Thread Tools
Posts: 90 | Thanked: 19 times | Joined on Oct 2007
#201
Originally Posted by Benson View Post
8 * 1.2V (assuming NiCd/NiMH voltage) is 9.6 V; that, one silicon (i.e. normal rectifier) diode, and a ~9 Ohm resistor of appropriate power rating should yield a workable power supply, which will fall inside the Nokia specifications (for I-V characteristic at least).
8 * 1.5V, OTOH, is 12 V; the maximum voltage permitted is 9.3V, so this would be outside the charger spec and potentially harmful to the device.
Edit: Oh, and your calculation is wrong; the capacity in Ah is the same as for one cell, since you connected them in series. You don't pick up any by reducing the voltage with passive elements; the extra energy dumps as heat, so make sure your resistor is rated for the resulting power. (9W, if I calculate right...)
so it is better to use a 'double 6AA holder' (2x http://tinyurl.com/4lon93)
6x1.2v=7.2v - 0.4v (diode 1n4002) = 6.8v / 0.800A ~= 8.5 ohm and 5.44W power to dissipate, this for the two packs, so we have a power of 2000+2000mAh = 4000mAh not bad i think, sorry for my bad english and VERY poor electronic knowledge
 
Red's Avatar
Posts: 155 | Thanked: 63 times | Joined on May 2007 @ UK
#202
Originally Posted by AbelMN View Post
I bought the Philips in a Media Markt (400 shop in Urop).Don't know about the UK.

It's part of the "Philips power2go" range. I also don't see it anymore in the US / UK Amazon.

Succes, Abel.

There is one of these on ibood today at £22.35
ibood.com
__________________
N800, OS2008 + E51. 3.5G. Warning, this post contains at least one nut and is a source of hyperbole.
 
luca's Avatar
Posts: 1,137 | Thanked: 402 times | Joined on Sep 2007 @ Catalunya
#203
Originally Posted by Red View Post
There is one of these on ibood today at £22.35
ibood.com
The spec says 350mA, is that enough to charge the tablet?
 
Posts: 269 | Thanked: 93 times | Joined on Feb 2008
#204
Originally Posted by Benson View Post
8 * 1.2V (assuming NiCd/NiMH voltage) is 9.6 V; that, one silicon (i.e. normal rectifier) diode, and a ~9 Ohm resistor of appropriate power rating should yield a workable power supply, which will fall inside the Nokia specifications (for I-V characteristic at least).

8 * 1.5V, OTOH, is 12 V; the maximum voltage permitted is 9.3V, so this would be outside the charger spec and potentially harmful to the device.
The N8x0 charger is rated 5.7V@800mA (when load connected), the best solution for a DIYer would be a step-up switching regulator with an output fixed at 6V@1A using 2 to 4 NiMh cells with a capacity not smaller than 2500mAh.
At 80% efficiency should be enough for 2 full battery charges with the device turned off or it could keep the device powered on for 5 hours (with wifi enabled and continued use) still being enough lightweight to carry around (4 NiMh are 106g according to my kitchen scales)

At least this is what I'm trying to build... man I wish I could work with SMD technology

Last edited by JustNick; 2008-07-18 at 13:23.
 
Posts: 18 | Thanked: 1 time | Joined on Mar 2008
#205
I just ordered on ebay. Seems not a bad deal
http://cgi.ebay.com/ws/eBayISAPI.dll...m=170245231787
 
Posts: 1 | Thanked: 0 times | Joined on Aug 2011
#206
I don't have a lot knowledge about this but I found a link that I hope can help you with this problem. Here is the link, cell phone accessories Your thread is really helpful. I hope your problem will now be fixed.
 
Posts: 4 | Thanked: 0 times | Joined on Jun 2014
#207
so old mobile phone.
 
endsormeans's Avatar
Posts: 3,139 | Thanked: 8,156 times | Joined on Feb 2013 @ From my Gabriola Island hermitage, near the Edge of the World
#208
Originally Posted by stefan0124 View Post
so old mobile phone.
If the n8x0 device line is "so old mobile phone"
then you're using a typewriter to post this....

since a typewriter isn't a computer.
and a n8x0 isn't a mobile phone.

get edumacated
__________________
Lurker since 2007, Member since 2013, Certifiable since 1972

Owner of :
1-n770 (in retirement), 3-n800's / 3-n810's (still in daily use), 5-n900's ((3 are flawless, 1 loose usb ( parts), 1 has no telephony (parts))
3-nexus 5's : 1 w/ Floko Pie 9.1 (running beautifully) waiting for Stable Droid 10 rom, 1 w/ ̶Ubuntu Touch, 1 with Maru OS (intend maemo leste when ready)

1/2 - neo900 pre- "purchased" in 2013. N̶o̶w̶ ̶A̶w̶a̶i̶t̶i̶n̶g̶ ̶r̶e̶f̶u̶n̶d̶ ̶p̶r̶o̶c̶e̶s̶s̶ ̶l̶a̶s̶t̶ ̶f̶e̶w̶ ̶y̶e̶a̶r̶s̶ - neo900 start up declared officially dead -
Lost invested funds.


PIMP MY N8X0 (Idiot's Guide and a video walkthrough)http://talk.maemo.org/showthread.php?t=94294
THE LOST GRONMAYER CATALOGShttp://talk.maemo.org/showthread.php...ight=gronmayer
N8X0 VIDEO ENCODING THE EASY WAYhttp://talk.maemo.org/showthread.php...ght=mediacoder
242gb ON N800http://talk.maemo.org/showthread.php?t=90634
THE PAIN-FREE MAEMO DEVELOPMENT LIVE DISTRO-ISO FOR THE NOOB TO THE PROhttp://talk.maemo.org/showthread.php?t=95567
AFFORDABLE MASS PRODUCTION FOR MAEMO PARTShttp://talk.maemo.org/showthread.php?t=93325

Meateo balloons now available @ Dave999's Meateo Emporium
 

The Following User Says Thank You to endsormeans For This Useful Post:
Posts: 4 | Thanked: 0 times | Joined on Jun 2014
#209
yeah,maybe N8X0 is not a mobile phone,but external battery pack is used for phones,For my phone, I use a solar power charger which gets me about 10-15hrs per charge, Universal USB Charger Kit, Emergency Cell Phone Charger (4-AAA gets about 30 mins) (I also have a few other travel, car/plane/plug/battery, chargers that I have not yet tried that might work out)

here are the links ,maybe you can get to know.

http://www.solio.com/charger/
http://www.234buy.com/

Last edited by stefan0124; 2014-06-25 at 12:21.
 
Posts: 4 | Thanked: 0 times | Joined on Jun 2014
#210
Originally Posted by endsormeans View Post
If the n8x0 device line is "so old mobile phone"
then you're using a typewriter to post this....

since a typewriter isn't a computer.
and a n8x0 isn't a mobile phone.

get edumacated
so what`s n8x0.
 
Reply


 
Forum Jump


All times are GMT. The time now is 15:38.