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Hello:
I built myself a car charger a while ago and it all seemed to work fine. A couple of times however my unit has 'died' after a particularly long journey in the car. I have recently discovered that it was actually getting flat enough to turn off and not turn on until charged; even though it was indicating it was charging.
Further experiments have revealed that if the battery in nearly full (eg 84%) and I use my car charger, the percentage of battery full increases over time indicating it is indeed charging.
However; if the battery is quite empty eg 24% - over time the battery charge decreases until the unit turns off, and needs to be attached to the mains to charge it - even thought it still indicates it is charging!
Soehere in the middle of the two battery states ( 84% - 24%), my charger seems uable to charge my XDA for some unknown reason, I suspected it could be due to current drain - a flatter battery may need more current to charge which the charger cannot provide, but the same situation occurrs even if the unit is turned of and therefore taking very little current from the car charger - obviously leaving nearly all the current available to charge the battery.
Any ideas why this should happen? I am completely stumped - I do not wish to buy a charger as my charging system also incorporates a connection to my GPS unit, and no commercially available chargers provide this at a reasonable price.
Any help or suggestions much appreciated.
BTW: The PDA will only charge if at least one of the pins 16,17,or 18 isconnected to ground and at least one of the pins 20,21 or 22 are connected to +5V. Otherwise, though the XDA may say it is charging, it will actually just drain the battery.
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icarusbop,
Have a look at the charger I made for my XDA II, for use with the in-car kit I also made. The schematics are on my web site - follow the link from my signiature below.
This charger works 100%, and the state of the battery has no effect on charging performance. Mind you, it is capable of supplying > 2 Amps which is sufficient to fully charge the battery while watching movies, and the screen brightness turned all the way up. Charging times are the same as using the plug pack supplied with tyhe XDA II, if not a tad quicker.
The only draw back is the heatsink required for the +5 volt regulator. For the smallish one I have chosen (for the car kit - see pic on my site) it is capable of 2 Amps, but with a larger heatsink (see the first attempt pic of this charger) a full 5 Amps is easily achievable over extended use. It all depends on how much juice your set up requires.
Hope this helps.
Recrem...
I have the same issue but I have an original car kit which was working fine. After I upgraded to 2.06.00WWE i noticed that although when plugged into car kit it says charging, it actually discharges. Although I like this version, I'm in the car quite a bit and need the device to charge, and am thinking about rolling back to the latest rom from the club imate site.
It appears to be a software issue more than a hardware issue....
:?
update,
I've discovered that if charged to atleast 90% when plugged into car kit then it charges.
at some level below this (don't know where yet) it discharges.
welcome to the twilight zone
I haven't tested this with my car kit, and haven't noticed any problems when I had SE installed, although my wife said that her device wasn't charging while in the car, and when she got home after a fair drive, her battery was indeed flat!
I rolled back from 2.02 + 2.06 merged SE to my origional ROM of 1.66.00.WWE purely because some problems became more and more evident - like being unable to connect to ActiveSync unless I reset the device numerous times, and spontaneous hard resets. I have all the same software on my device now with the origional ROM and no problems...
We will be moving this week, and it would be a good test for my ROM and charger to see if it charges when below 90%....
Recrem...
microphone
Hi, did you manage to get the mic working on you carkit? I cannot get the mic working when connected with pins 1 and 5. sound output is working however!
Thanks,
Rob Boerman
Did you design and build your own car kit, or did you follow my design from my web site? I am curious if anyone has used the info I have posted there...
Haven't had a chance to try the mic. I only know it will require a good pre-amp to get it working, and I have been too busy to build one yet - perhaps when I have settled down into our new home after this week-end...
Recrem...
let me know
If you find time this weekend let me know
cheers,
Rob Boerman
All
Just to give my two-pennies worth...
I bought a USB cable when purchasing my O2 XDA II from the O2 shop. When using this cable, if the existing charge is below 85% then the device discharges when connected, however, if it is above 85% then it charges quite happily.
Get this.. if I use my USB CRADLE to charge (in the same USB port etc..) then it charges from below 85% without any problems whatsoever!
Is there a possibility that the USB cable and the USB cradle are wired differently? Are we missing a trick here?
My charging issue has deteriorated to the point that it dosn't charge at all in the car kit, it does charge in the pc usb hub and on mains. I down graded to 1.72.00WWE last night and tested it in the car kit this morning and it still discharged, so the software appears to have nothing to do with it.
I think the earlier statement by indecided may yeild results:
"The PDA will only charge if at least one of the pins 16,17,or 18 isconnected to ground and at least one of the pins 20,21 or 22 are connected to +5V. Otherwise, though the XDA may say it is charging, it will actually just drain the battery."
I will pull my gear apart this weekend and test it out. Possibly I've got a bad connection.
davidberrysmith said:
I think the earlier statement by indecided may yeild results:
"The PDA will only charge if at least one of the pins 16,17,or 18 isconnected to ground and at least one of the pins 20,21 or 22 are connected to +5V. Otherwise, though the XDA may say it is charging, it will actually just drain the battery."
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Click to collapse
[Theory] The pins are quite thin, it's hard to think you can push 2+ Amps thru one of them without melting it down (at least the insulation). Maybe this is the problem: if you need a big loading current - like when the battery is below 85% - and you don't have more than one pin pair connected to +/- 5V the phone is not charging, although it may say so.
Solution: connect ALL three of pins 16-18 to GND and ALL three pins 20-22 to +5V.
[/theory]
Solved my problem,...
pin 22 had come away from the circuit board. So I sweated it down and just for good measure sweated down all other connections as well.
Put the phone back together and threw it in the car kit, charge ingreased from 78%.
time to upgrade the os again.
:wink:
david... perseverance does pay off... cool.
I've buyed an auto charger capable of 2100 mAh, but with gps and data connection active, however, the battery drains quickly.
Can anyone help?
Flash android 2.3.4 and ti'll fix the battery drain bug which is a problem in 2.3.3
shad0wboss said:
Flash android 2.3.4 and ti'll fix the battery drain bug which is a problem in 2.3.3
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Ok, i've flashed the 2.3.4. I the next days will try the behaviours.
Any news? have you tried?
The battery charging so slow. It may take more then 4 hour for full charging. Can this problem solved after flash to 2.3.4?
With the new rom 2.3.4 flashed, the battery consume seems to be much linear than before, moreover maybe i've find the solution in the usb cable used in the car: a quick test by using the original usb cable with gps and data connection active has incremented the battery charge by 1% in a 10 km path.
Maybe the original cable has some special terminals configuration?
More extensive tests in next days.
Any improvement of charging time required after flash with 2.3.4 rom?
mynewuser said:
Any improvement of charging time required after flash with 2.3.4 rom?
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does not seem...
I know this problem from my HTC Desire, it's was the same and the reason was that a orig. charching cable from HTC had a special pin which says the phone to charge like ac with full power and not only usb power! You can check this in the menü. There is an entry for charching which says "AC" or "USB" charching. If it shows "USB" it goes very slow! But i don't know that there is a special charching cable for car charching from samsung available too.
Where is the menu entry that shows if is charging USB or AC?
Thanks
Hi,
You will find it there:
Settings -> (telephone) Status -> Battery Status
There it says charging AC or USB
With AC it charges with full power, with USB it charges with 500mAh only -- which is not enough power for GPS and Screen on.
(At least it's like that with HTC devices)
I have a HTC Legend -- my solution to this problem was to short-circuit the Data pins in the Micro-USB-Port of the Car-Charger.
The Original HTC-AC->USB Adapter also has the Data-Pins Short circuited.
If you buy the HTC Car-charger you will geht a special USB-Cable that only works for Charging and not for Data transfer.
So HTC Devices recognize the Original charges by detecting the short-circuited Data pins.
I don't know if it's the same with Samsung devices!
I hope it helped you a bit!
Any link on how to connect the circuited Data pins?
Yes, probably a connection scheme would be useful.
I bought today a car adapter with 1000 mah Power and micro usb port. It charges with "AC" shown in the system
It was very cheap only 10,- EUR from Germany Company "Hama" a great hardware
Yesterday i've tried with another cheap charger, and AC charge is here, by using the same cable of 2100 mAh charger.
So my conclusion is that the trick is in the charger port, not in the cable.
By searching on google, seems that the two central pins need to be short-circuited...
Hello everyone, I hope my English is understandable.
To avoid damaging the cable, I have modded the charger.
Generally the chargers are very simple to dismount: simply unscrew the ring that holds the spring and the fuse and remove a couple of screws.
Usually the data pins are soldered on the circuit board only for mechanical reasons (increase the endurance of the connector), but they are connected to nothing. Short-circuit the data pins with a solder, directly on the circuit board.
Now i see AC charge.
My old Toshiba TG01 required the same trick.
mom4751 said:
Hello everyone, I hope my English is understandable.
To avoid damaging the cable, I have modded the charger.
Generally the chargers are very simple to dismount: simply unscrew the ring that holds the spring and the fuse and remove a couple of screws.
Usually the data pins are soldered on the circuit board only for mechanical reasons (increase the endurance of the connector), but they are connected to nothing. Short-circuit the data pins with a solder, directly on the circuit board.
Now i see AC charge.
My old Toshiba TG01 required the same trick.
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Click to collapse
Good! I will try myself.
Anyone try this modification? Can it work?
http://winhlp.com/node/855
Hello, I'm a N8000 user. I'm facing a problem with my charging issue where my tab take a long time to charge and it takes 10 hours to get from 0-60 %. FYI, I'm using a custom rom CM 10.2. What is the main cause with the charging issue? Does it related with charging port, battery or charger itself? please help me. I'm stuck now.
[QUOTE8=syafix21;50085752]Hello, I'm a N8000 user. I'm facing a problem with my charging issue where my tab take a long time to charge and it takes 10 hours to get from 0-60 %. FYI, I'm using a custom rom CM 10.2. What is the main cause with the charging issue? Does it related with charging port, battery or charger itself? please help me. I'm stuck now.[/QUOTE]
Charger maybe, but most on here get a new factory cabel and that takes care of it.
syafix21 said:
Hello, I'm a N8000 user. I'm facing a problem with my charging issue where my tab take a long time to charge and it takes 10 hours to get from 0-60 %. FYI, I'm using a custom rom CM 10.2. What is the main cause with the charging issue? Does it related with charging port, battery or charger itself? please help me. I'm stuck now.
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Click to collapse
Many similar thread already here & also the solutions.
But let me answer anyway.
Charging problem occurs because of one or more things:
Broken Cable
Broken Charger
Incompatible Cable
Incompatible Charger
Broken Outlet
Broken Charging Port
Broken Battery
To properly charging a N80XX we need a charger & cable that can deliver 2.1A, 5V of electrical current & voltage.
The factory default/initial charger & cable designed to deliver these requirements.
Using custom/cheap cable or cable extension can cause charging problem as it wasn't designed to deliver the required current & voltage.
Most custom cables & chargers on the market designed only to deliver 500mA(0.5A) - 1A, 5V.
Broken cable/charger can also cause it to fail in delivering 2.1A, 5V to the device.
Try another original cable/charger combination to test if one of them or both are broken.
Also try another electrical wall outlet to see if the outlet is the culprit.
For Broken Charging Port, you can change it yourself by buying the spare part & replace the broken one, but it requires high technical skills.
One mistake can cause you to ditch your device.
It's safer if you send it to a qualified/authorized service center or if it's still under warranty you can send it back to samsung.
The last possibility is extremely rare.
Broken Battery symptoms are usually different than your problem symptoms.
If the battery is broken, usually the battery life is shorter than usual and may be won't charge at all or charging time is very short.
But if this is your problem, you can't sent it back to samsung - unless the battery is factory damaged -, as you need to change the internal battery.
Try to find out which one is your real problem & fix it
REMINDER:
2.1A is producing heat so much that hurt your skin if you touch the metal part of the cable heads directly right after a long period of charging.
The heat it produce is much more intense than if you are using 500mA or 1A charger.
Poorly designed custom cable/charger can be melted by the heat & may cause explosion!!
...and.....ALWAYS SEARCH BEFORE ASKING!!
I hope this will help
I'd like to add that I was facing similar problem.
In my case, the problem was a stock charger cable.
It was not "broken" (in the meaning of totally cracked or cut cable) but it seemed that it isn't providing a stable voltage. In result, I was able to load the battery only when not using the device (plus the process was as slow as hell), coz when using it, the consumed power was higher than provided by the charger.
Meanwhile, before the problem occured, I was testing other solutions to be able to make charging cord longer than provided stock, which is only 1m. Those tests included using of the additional 2m USB-USB expansion cable which I was plugging to the plastic charger element from the one side and to the regular charging cable at the second side. Such a combination resulted in similiar results as above - then, it became obvious for me that the tablet consumes or wants to consume so high power that low-quality USB cable can't handle, and - especially if it is 2m long - it's degrading onto his way to the tablet.
Then, I am not sure if n8000, by demanding so much power, is not degrading the cable (even stock one) itself. I must say, that after that, I was using another charger cables (n8000 dedicated, one 2m second one 1.5m, both not original) which started to work significantly worse in even shorter time such as two weeks after first use. I am not a electrician or hardware specialist, I dunno if it is possible to degenerate the usb cable with the voltage such as one needed for charging the tablet, but during my over 10 years of passion within mobile devices, I have killed no more than 2 chargers IN TOTAL. N8000 killed 3 charging cables within 8 months.
For some time, I use another combination - I use a 1,5 long A/C extension cord, with a handy "8" plug at the second end. This fits into the charger "central box" after you dissolve it into two parts. Now, the voltage will not degenerate onto this 1.5m distance, as the cable of that type was designed particularly for 230V transfers, but it will still be perfectly mobile. At the second side of the box, I do not plug back the 1m stock cable (or longer not-official ones), but a cable that the Samsung provided along with an external battery, which is possible to buy here and there... It is about... 20 cm long The purpose of this was to avoid the energy lossess that occured when using longer cables and preserve the maximum possible charging rate. Since then (and about 5 months has passed) I have no further problems with charging, and the battery life seems to be much more better than I supposed it to be after over a year of really extensive usage (the only issue of above solution is that the plastic box in the middle is making really really hot, but it is not a critical problem i suppose, as since 5 months it HASN'T melted, exploded or something )
hay....i have the same problem but this tablet doesnt get charging
i think its not about charger because it gives 5v and 2A after the usb flat but in battery connector i got no current and there is just less than 1V voltage
Hi..
Anyone tried wireless charging on our device using Universal Qi Wireless Charging Receiver Film??
think someone mentioned there were two unused contacts on our tablet by the power distribution board so... maybe...? i'm not risking shorting my tablet out ;x
Only via usb qi adapter
Yes i'm sure that QI usb receiver film is the safest to use. But does it gives enough power to our huge battery? Anybody test it to give us feedback?
Sent from my GT-N5100 using XDA Free mobile app
That is a good point. So maybe carging will take double time
msdn70 said:
Yes i'm sure that QI usb receiver film is the safest to use. But does it gives enough power to our huge battery? Anybody test it to give us feedback?
Sent from my GT-N5100 using XDA Free mobile app
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I don't believe it will work without some modification. I picked up a great deal on a note 8, a couple of days ago, but it came without a charger. I had to juggle several different chargers and cables to find a combination that would work. I believe that the data lines need to be tied together (shorted via a resistor) & a minimum input amperage. I have a 500mA receiver I'll test tonight. I also just picked up a 1000mA reciever (made for a galaxy s5), and once I can solder on a micro usb plug I'll try it as well.
I suspect we'll need to do some modifications to get a workable usb wireless receiver going. Probably at least 1000mA and a surface mount smd resistor between the data lines.
Alternately the usb charger port is a fairly simple plugin replacement, and cheap (around $5 on ebay). It's pins are also large enough to solder some 22 or 24 gauge wire if you have a steady hand. It could be a possible solution to have wireless charging without tying up the usb port.
I'll post when I have more info.
Ok tested the note 8 with a 500mA generic usb wireless receiver. Did not charge. Turned it off and left it on the pad for a few hours, no change in charge, Galaxy charging current shows no charging. I have a 1000mA film/tag that just arrived and I'll try it soon(ish)., but I don't expect any difference.
If the data lines need to be tied together to charge it eliminates a couple of options. The cleanest would have been popping the back off (fairly easy to open) and soldering directly to the usb board pins, since it wouldn't block the usb port, but that's out, since we can't tie the data lines together.
Using a modified generic usb film is also out unless you *never* use your usb port for anything. Some of the usb receivers do have contacts for all 5 pins (although most don't) so it could be modified to work, but you don't want to be taking the back off all the time.
So I think the best alternative (if the unmodified 1000mA reciever doesn't work) is a case, with a wireless receiver. I did that for my tab 2, and it worked ok, but I doubt I'll go through the trouble with the note 8.
Any news about Qi charging for Note 8.0 ?
I know this post is quite old, but I would like to know about your experiments on trying the 1 A module and the resistor value you wanted to test with your Note 8.
Anybody else having found a solution?
A.Sectron said:
I know this post is quite old, but I would like to know about your experiments on trying the 1 A module
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The results were the same as with the 500mA receiver (no/not charging).
A.Sectron said:
and the resistor value you wanted to test with your Note 8.
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Click to collapse
I have not tested a resistor value, since tying the data lines together is not a viable method for an internal receiver (although I may use it for a case in the future). However it can be determined fairly easily by simply measuring your current charger/cable combination's ohms (assuming there is a value, it may simply be shorted) with your multimeter.
Thx - Good to know, you havnt given up this idea for wireless charging on Note 8.
devinpatterson said:
... tying the data lines together is not a viable method for an internal receiver (although I may use it for a case in the future).
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Click to collapse
Some time ago I came across a solution for Note 3 on eBay. Apart from the NFC contact pins, do you believe it could be useful for Note 8? The current is around 1000 mA too and I dont mind soldering some wires parallel to the Note 8 battery connections from that slim coil package?
Does Samsung check the manufacture license detection for Qi chargers at Note 8 the same way as in Note 3 for S-View cover? I know we dont need such at Note 8, but the additional pins (I saw 5 all together on that receiver) may have a function for Kitkat and the charging circuit detecting weather the coil or the data connection is working. - Its just an idea why the simple 2 wire connection you have tried didnt charge at all.
If I have to connect the coil through USB, the whole advantage of wireless charging is nil. I would like to avoid plugging the USB in my car, the connection may not last as long as the accu could survive. - Thx for sharing your knowledge.
A.Sectron said:
Some time ago I came across a solution for Note 3 on eBay. Apart from the NFC contact pins, do you believe it could be useful for Note 8? The current is around 1000 mA too and I dont mind soldering some wires parallel to the Note 8 battery connections from that slim coil package?
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Click to collapse
No there is nothing like an S-cover for the note 8 because it (the note 8) doesn't have a user removable back (and therefore no contacts to receive a charge even if you did remove the back). I'd strongly recommend against wiring directly to the battery.
A.Sectron said:
Does Samsung check the manufacture license detection for Qi chargers at Note 8 the same way as in Note 3 for S-View cover?
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Click to collapse
Sorry don't know what your asking there.
A.Sectron said:
I know we dont need such at Note 8, but the additional pins (I saw 5 all together on that receiver) may have a function for Kitkat and the charging circuit detecting weather the coil or the data connection is working. - Its just an idea why the simple 2 wire connection you have tried didnt charge at all.
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Click to collapse
Only the USB connector is relevant since the note 8 doesn't have a additional charging circuit built in (like the note 3 does for the S-cover or wireless charging back/cover). The usb works with the correct cable and charger. It's not unusual for the charger from specific manufacturers to have the data lines tied together with a few variations (directly tied together, or tied together with various resistances). The problem is we can't make those alterations internally without compromising the usb port (I believe). That is why the charging receiver film/coil will have to be in an external case connected to teh usb port. That way the appropriate alterations can be made without impacting the usb port.
I need 2m cable for my Blackview bv5000 with fast Charge capability .
I have noticed that this is not readily possible with not original cable even with same cable lengths.
Also some power supplies (2A) have differently behavior.
I try to force AC mode with bridged the data line D+ D- , without success .
who knows how the quick charge detection really(!) works ?
(the original cable is definitely not resistors coded)
Way late to the game, but since there are no replies...
pa647 said:
I need 2m cable for my Blackview bv5000 with fast Charge capability .
I have noticed that this is not readily possible with not original cable even with same cable lengths.
Also some power supplies (2A) have differently behavior.
I try to force AC mode with bridged the data line D+ D- , without success .
who knows how the quick charge detection really(!) works ?
(the original cable is definitely not resistors coded)
Click to expand...
Click to collapse
I know this is a way old post now, some two and a half years or so, but since it pops up in my search it probably will pop up in others -- and with no answer. However, I'm no expert on the subject. I've just read some stuff here and there, so take my post as anecdotal if you like.
In short, it's not your cable. It's your charger. Although you do need to ensure the cable is rated for the current that will pass through it, the cable is likely not what's limiting your charge rate. [Edit: Come to find out there are 24 pins on the USB-C, so maybe if some of those aren't included on your cable (they're not all on mine) then the charger might not see it so maybe it IS your cable -- but the one that came with the phone should always work with the charger that came with the phone.]
The Blackviews I have seen all use a Mediatek processor. It requires a different protocol in the charger than the Qualcomms you're accustomed to from the likes of LG and Samsung. Without the right protocol, it will default to the lowest common denominator of a standard: 5 volts, 500 milliamps. At that rate, it will take hours to charge ANY modern device larger than an earbud.
I made a spreadsheet to calculate all this. I used OpenOffice, but as long as the formulas translate into XLS format, it should open with Excel just fine. (See attachment)
[Edit: Typed a book and then realized 1) noone would read it and 2) I probably had all the details wrong anyway ]