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Several people have asked my questions regarding the connector on that adapter that comes with the XDA II and allows you to use the AC/DC charger without the cradle. :idea:
THis info is quite usefull, also if you are building your own usb sync/charge cable.
First off, the AC/DC charger is rated at 5V and 1 amp, though it has a no-lead voltage around 6.3V (GND is on the outside of the charger plug, +5 Volts on the inside hole/pin). You don't really need the 1 amp to charge the XDA, it's just there so that you can also charge the second battery, which you can insert into the cradle .
Now for the Pinout on the adapter. See here for more info on the XDA connector: http://www.xda-developers.com/connectors/
Pin 20,21,22: +5 Volt
Pin 16,17,18: GND
Pin 5: GND
Shorting the lines across three pins provides current load leveling for charging.
Now for the usb sync/charge cable. Here we need to add the following pins:
Pin 2: GND (my usb charge/sync cable does not connect to pin 5, just pin 2, so these are probably shorted inside the XDA)
Pin 13: +5 Volt
Pin 14: USB Data H(+)
Pin 15: USB Data L (-)
From the design, it becomes evident that the pins 16-18/20-22 are only used for the charge circuitry. There is probably a current sensing circuit in this set.
Pins 2 and 5 are the digital ground. Pin 13 powers the usb circuitry, also waking the XDA and starting AxctiveSync.
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.
[email protected] said:
Several people have asked my questions regarding the connector on that adapter that comes with the XDA II and allows you to use the AC/DC charger without the cradle. :idea:
THis info is quite usefull, also if you are building your own usb sync/charge cable.
First off, the AC/DC charger is rated at 5V and 1 amp, though it has a no-lead voltage around 6.3V (GND is on the outside of the charger plug, +5 Volts on the inside hole/pin). You don't really need the 1 amp to charge the XDA, it's just there so that you can also charge the second battery, which you can insert into the cradle .
Now for the Pinout on the adapter. See here for more info on the XDA connector: http://www.xda-developers.com/connectors/
Pin 20,21,22: +5 Volt
Pin 16,17,18: GND
Pin 5: GND
Shorting the lines across three pins provides current load leveling for charging.
Now for the usb sync/charge cable. Here we need to add the following pins:
Pin 2: GND (my usb charge/sync cable does not connect to pin 5, just pin 2, so these are probably shorted inside the XDA)
Pin 13: +5 Volt
Pin 14: USB Data H(+)
Pin 15: USB Data L (-)
From the design, it becomes evident that the pins 16-18/20-22 are only used for the charge circuitry. There is probably a current sensing circuit in this set.
Pins 2 and 5 are the digital ground. Pin 13 powers the usb circuitry, also waking the XDA and starting AxctiveSync.
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.
Click to expand...
Click to collapse
I just received my iMate XDA2. I have a charging connector/USB cable combo left over from my XDA1. I inserted it into the XDA2 and the amber glowed (charging) and got to green (charged). Your comment about if pins aren't grounded, unit appears to be charging but actually isn't. Is there a way to confirm the charge/USB combo is actually okay for my XDA2?
from what ive heard/been reading the XDA 2 charger kicks out 2Amp max not 1A
and cahrging via usb will drain your battery more then it will charge it?
so i dont think modding the cradel to charge via usb will do nothing but drain your xda2 whilst sitting on it as it will be lit up and activesync will be open
gaz
XDA2 Charging
gazzaman2k said:
from what ive heard/been reading the XDA 2 charger kicks out 2Amp max not 1A
and cahrging via usb will drain your battery more then it will charge it?
so i dont think modding the cradel to charge via usb will do nothing but drain your xda2 whilst sitting on it as it will be lit up and activesync will be open
gaz
Click to expand...
Click to collapse
The charger is rated actually at 1 amp and for purposes of charging the 2nd battery in the cradle if one had a spare. Thus 500mA or less will charge the unit. It did mine.
oh how come on xpansys their chargers kick out 2A :? :shock:
Just for those without an electrical engineering degree:
Important for charging is the voltage, not the current. Sure, a large charge current could charge the battery faster, but even then only if the charge voltage were high enough. And then, these batteries are highly sensitive beasts, requiring a complex charge strategy - if the current is too high they just blow up! If the current is low, it just takes longer.
The MDA/XDA has an intelligent charge circuit, which is software controlled and most likely senses and controls the actual charge current. When doing a "full blow" charge it probably limits the current to around 0.5 amps (though I haven't measured this), but will decrease this current considerably once the battery gets nearly full (otherwise we would cook the battery).
Aes, you can charge the XDA without problems from the usb bus. The only caveat: check that cable -see above!. I do it all the time and in fact, have often gone into internet cafe's whilst on the road just to charge my XDA (cause the charger was defect).
And yes, you can see if the battery is really charging: if the light is on and the %-age full increases over a few minutes, then the battery is really charging.
ah cool cheers for clearing that up then lol so it does work my bad :\ just thought it was weird how their cahrgers are 2A meaning it will be charged in like 2 seconds like :\ thats what confused me
gazzaman2k said:
oh how come on xpansys their chargers kick out 2A :? :shock:
Click to expand...
Click to collapse
The rated output is 5V / 2A for the XDA2 AC adapter. My math was a little in error. If you don't have a 2nd battery charging in the cradle, than a 5V / 1A charger would suffice. Howver, it did a great job of charging just thru the USB cable. I can't remember off the top of my head what a USB line is capable of - 500mA??
Sorry for the confusion.
i've got the solution!!!
Hi everyone, i think i have the solution of XDA II not charging on USB port using XDA sync/charger cable... if u want the XDA II charging from USB, just open up the connector and disconnect the 20,21,22 pins from USB bus power line. After that, u can use XDA sync/charge cable in any USB port and they will sync and charge the XDA II.
How i know this??? 'cos i "reverse-engineered" the connection of the cradle... i was wondered y using the same usb port, the cradle can charge while the sync cable can't... so i test all the connection of the cradle and found that pin 20,21,22 and also pin 2 is disconnect. The pin 20,21,22 only connected to power when u plug in the DC into the cradle. This mean that pin 20,21,22 connected to DC (+) while the pin 2 is connected to DC (-) only when u plug in the external DC supply to the cradle.
I've modified my XDA sync cable and now i can charge my XDA II on any USB port even from my laptop. Hope this helps for those who purchased the XDA sync/charge cable to use with XDA II. :wink:
To those who like to go further....
The only problem that i can c now is that if u modified the cable and u use it with a car adaptor, will it charge the XDA II as fast as possible like when u plug in the external DC supply? OR will it only trickle charge the XDA II as using USB port? i really don't know 'cos i don't have a car here with me to try it out... but i think it will only trickle charge the XDA II only...
Therefore, to those who like to get charge faster in the car, u can install a small switch connected between the USB power line and pin 20,21,22. By switching the switch, u can choose between trickle charge and fast charge. 8)
Re: i've got the solution!!!
[so said:
hai®]Hi everyone, i think i have the solution of XDA II not charging on USB port using XDA sync/charger cable... if u want the XDA II charging from USB, just open up the connector and disconnect the 20,21,22 pins from USB bus power line. After that, u can use XDA sync/charge cable in any USB port and they will sync and charge the XDA II.
How i know this??? 'cos i "reverse-engineered" the connection of the cradle... i was wondered y using the same usb port, the cradle can charge while the sync cable can't... so i test all the connection of the cradle and found that pin 20,21,22 and also pin 2 is disconnect. The pin 20,21,22 only connected to power when u plug in the DC into the cradle. This mean that pin 20,21,22 connected to DC (+) while the pin 2 is connected to DC (-) only when u plug in the external DC supply to the cradle.
I've modified my XDA sync cable and now i can charge my XDA II on any USB port even from my laptop. Hope this helps for those who purchased the XDA sync/charge cable to use with XDA II. :wink:
To those who like to go further....
The only problem that i can c now is that if u modified the cable and u use it with a car adaptor, will it charge the XDA II as fast as possible like when u plug in the external DC supply? OR will it only trickle charge the XDA II as using USB port? i really don't know 'cos i don't have a car here with me to try it out... but i think it will only trickle charge the XDA II only...
Therefore, to those who like to get charge faster in the car, u can install a small switch connected between the USB power line and pin 20,21,22. By switching the switch, u can choose between trickle charge and fast charge. 8)
Click to expand...
Click to collapse
I would be most carefull about this solution. I know that the charge-light will go on, but I'm not sure it will actually charge the battery (just check after 5-10 minutes if the batteries have really charged.
As you noted, the external charger goes across pins 20-22 (+5V) and 16-18(GND). This is where the XDA is meant to charge the battery - and it will do so under any conditions if the +5V is applied here. Pin 13 is meant to power the usb circuitry and it wakes the XDA II up, starting ActiveSync at the same time, it is not meant to charge the battery.
Hi, i've checked and tried on few machines... it really works... trust me... maybe the charging circuit on XDA II is different from XDA???
And as i said in the post b4, the connection is "copied" from the original cradle, so it's absolutely correct unless i did something wrong on my side... but well i've double checked it... :wink:
If u've some time to spare, can u pls check the connection of the cradle as well? it's good to verify so that all XDA II users will benefit from this... Thanks!
Should work, since I only use the cradle without power supply to charge my MDA II. Full or empty doesn't matter, the MDA II always gets fully charged.
Didn't measure the pin layout yet in my cradle.
Upgrading from T-mobile pocket pc phone edition to imate
In reveiewing this thread - it appears that I will be able to use my car charging cradle, and my USB chrger/synch cable, perhaps with some minor pin adjustments.
I would like to know if anyone has experienced any damage/ problems relating to using xda1 accessories with the xda2.
Also, I have the thumb-keyboard, and wonder if anyone has tried using the xda1 thumbboard with the xda2. Would like to avoid re-buying all my accessories if possible. Help is appreciated.
Thom Hall
Upgrading from T-mobile pocket pc phone edition to imate
In reveiewing this thread - it appears that I will be able to use my car charging cradle, and my USB chrger/synch cable, perhaps with some minor pin adjustments.
I would like to know if anyone has experienced any damage/ problems relating to using xda1 accessories with the xda2.
Also, I have the thumb-keyboard, and wonder if anyone has tried using the xda1 thumbboard with the xda2. Would like to avoid re-buying all my accessories if possible. Help is appreciated.
Thom Hall
Re: i've got the solution!!!
[so said:
hai®]Hi everyone, i think i have the solution of XDA II not charging on USB port using XDA sync/charger cable... if u want the XDA II charging from USB, just open up the connector and disconnect the 20,21,22 pins from USB bus power line. After that, u can use XDA sync/charge cable in any USB port and they will sync and charge the XDA II.
How i know this??? 'cos i "reverse-engineered" the connection of the cradle... i was wondered y using the same usb port, the cradle can charge while the sync cable can't... so i test all the connection of the cradle and found that pin 20,21,22 and also pin 2 is disconnect. The pin 20,21,22 only connected to power when u plug in the DC into the cradle. This mean that pin 20,21,22 connected to DC (+) while the pin 2 is connected to DC (-) only when u plug in the external DC supply to the cradle.
I've modified my XDA sync cable and now i can charge my XDA II on any USB port even from my laptop. Hope this helps for those who purchased the XDA sync/charge cable to use with XDA II. :wink:
To those who like to go further....
The only problem that i can c now is that if u modified the cable and u use it with a car adaptor, will it charge the XDA II as fast as possible like when u plug in the external DC supply? OR will it only trickle charge the XDA II as using USB port? i really don't know 'cos i don't have a car here with me to try it out... but i think it will only trickle charge the XDA II only...
Therefore, to those who like to get charge faster in the car, u can install a small switch connected between the USB power line and pin 20,21,22. By switching the switch, u can choose between trickle charge and fast charge. 8)
Click to expand...
Click to collapse
Just to check with you, i am going to test my car charger....are you saying that the +ve needs to be connected to either one of the pins (#20,21,22) and -ve to gnd pins (16,17,18).
Is all the gnd #2,#5, #16, #17 & #18 shorted? and pin#20, 21 and 22 shorted as well?
Thanks. :?:
Hi i've made a "not-so-nice" layout... which i think explained better than myself... :lol:
The lower part showed the connection needs to sync and charge with USB only. The upper part become valid when u plug in the external DC into the cradle. I do think that pins 2,5 is somehow shorted internally.
So, if u test ur car charger, i think pins 20,21,22 should shorted with pin 13 to the power(+) while pins 2,5,16,17,18 are shorted to ground(-).
The XDA car charger shouldn't be a problem to charge the XDA II... it's just the XDA USB sync and charge cable that causing the non-charge bug on XDA II...
Hope this clear all the confusion... :wink:
Best regards,
[so said:
hai®]Hi i've made a "not-so-nice" layout... which i think explained better than myself... :lol:
The lower part showed the connection needs to sync and charge with USB only. The upper part become valid when u plug in the external DC into the cradle. I do think that pins 2,5 is somehow shorted internally.
So, if u test ur car charger, i think pins 20,21,22 should shorted with pin 13 to the power(+) while pins 2,5,16,17,18 are shorted to ground(-).
The XDA car charger shouldn't be a problem to charge the XDA II... it's just the XDA USB sync and charge cable that causing the non-charge bug on XDA II...
Hope this clear all the confusion... :wink:
Thanks for the clarification. As i am not able to tell where i should start count on the pin and also which leg it belongs to, can you shed some light on this.
I have attached 2 pics of cable end.
Best regards,
Click to expand...
Click to collapse
Anyway to modify a Boxwave cable for use with an XDA II?
Have read the posts with interest. Can someone confirm what needs to be done to get a USB cable to charge.
Many thanks
o2xda2 said:
[so said:
hai®]Hi i've made a "not-so-nice" layout... which i think explained better than myself... :lol:
The lower part showed the connection needs to sync and charge with USB only. The upper part become valid when u plug in the external DC into the cradle. I do think that pins 2,5 is somehow shorted internally.
So, if u test ur car charger, i think pins 20,21,22 should shorted with pin 13 to the power(+) while pins 2,5,16,17,18 are shorted to ground(-).
The XDA car charger shouldn't be a problem to charge the XDA II... it's just the XDA USB sync and charge cable that causing the non-charge bug on XDA II...
Hope this clear all the confusion... :wink:
Thanks for the clarification. As i am not able to tell where i should start count on the pin and also which leg it belongs to, can you shed some light on this.
I have attached 2 pics of cable end.
Best regards,
Click to expand...
Click to collapse
Click to expand...
Click to collapse
The odd pins (1,3,5...21) are located on one side, the even pins (2,4,6...22) on the other side. Your left picture shows the even and the right picture the odd pins.
Fidl
Hi all,
I'm sure this will infuriate those guys who are trying their best to explain this to us thickies....but.....
I have purchased the L'il Sync cable from eXpansys (from PPCTech I think) and, obviously, it won't charge the XDA-II.
Now I have a soldering iron, and I'm prepared to use it, but I need to know EXACTLY which wires to chop, or where to solder. I'm still having trouble woking out whether to solder pin 16,17 or 18 to somewhere - or whether to cut other wires off. I fact - I don't really know which pin is which!
I know you guys have the know-how - but you need to make it really simple for me to understand!
Please help!!
Thanks,
MB
Can anyone confirm whether the XDA2 has the same connector and pinout as the XDA?
Some accessories seem to say they're compatible with both models and some say they're only for one model or the other.
I want a power lead "Y" lead to connect to my GPS receiver and to send the power and serial signal to my XDA2. Will such leads sold by TomTom and others for the XDA do for the XDA 2 as well?
Thanks.
The XDA and XDA2 (XDAII) share the same connector and pin assignments. See http://wiki.xda-developers.com/wiki/Connectors .
Thanks Darren. I'll go and order a couple from TDC......
They are NOT exactly the same. Charging pins have changed. My XDA I sync/charge cable, for example, will sync but not charge.
The car charge lead that came with my GPS unit says it works with both XDA and XDA II. I have not used it as I'm using a car kit with GPS port. Just keeping as a spare in case I want to use the GPS in another car.
Ed
Carlos said:
They are NOT exactly the same. Charging pins have changed. My XDA I sync/charge cable, for example, will sync but not charge.
Click to expand...
Click to collapse
Guess you broke the cable. Every XDA cable i saw worked on my MDA and viceversa....
The layout is the same, or it isn't.
It always works, or it never works, no inbetweens...
This is well documented, so go do a search. The symptom is that the XDA II will show a charge light, but will not actually charge. Well known. Someone recently posted pics of the slight mods needed to make an XDA I cable work properly on the XDA II.
There is no issue with using an XDA II-compatible cable on an XDA I.
Carlos said:
This is well documented, so go do a search. The symptom is that the XDA II will show a charge light, but will not actually charge. Well known. Someone recently posted pics of the slight mods needed to make an XDA I cable work properly on the XDA II.
There is no issue with using an XDA II-compatible cable on an XDA I.
Click to expand...
Click to collapse
Right, only the applied power seems to be a problem with some cables.
Like USB-charger cables...
I am using an xda1 cable on my xda2 in the car using a usb cigarette lighter adaptor and it will charge it ok unless my battery power is below 10%, then it quickly sucks the remaining charge out whilst showing that it is charging it
If i plug the lead into a computers usb port and try to charge the xda2, it just discharges it fast no matter how much charge its got in it
Well I've taken the gamble and ordered the XDA power & GPS lead from TDC for my XDA2.
They've sold one before for an XDA2 and it hasn't been returned, so they assume its OK, but can't guarantee for sure.
I'll keep you posted.....
Looking for a desktop dock that provides PC connectivity AND a decent AC charge.
I understand that it will need a seperate charger as well as the PC USB connection.
Don't mind spending a bit of money on it either, just don't want to get another crappy one off Ebay that doesn't do the job properly.
I'm also after a nice dock for work. mobilefun.co.uk have a few at not too bad prices. That said only one of them had a dock with an extra micro usb port on the back for faster AC charging.
Mine has a USB port on the back for faster AC charging. It doesn't work, regardless of which charger I use to power it!
I am very happy with this one from Proporta
http://www.proporta.com/F02/PPF02P05.php?t_id=5068&t_mode=des
It has a nice support and does a good charge each evening for me. I could not ask for more for 17 euros.
schalmers said:
I am very happy with this one from Proporta
http://www.proporta.com/F02/PPF02P05.php?t_id=5068&t_mode=des
It has a nice support and does a good charge each evening for me. I could not ask for more for 17 euros.
Click to expand...
Click to collapse
But does this also charge your phone when you computer is off?
I think that is one of the main questions of the op.
Yeah what I'm after is a dock that will use the AC supply for charging and USB for PC connectivity.
Did you even visit the page and read the product description?
This handy product plugs into a standard USB port and includes AC power input with LED indicator for fast charging using your standard AC power supply
Click to expand...
Click to collapse
I'm ashamed to say I didn't. I have now though and am about to order one.
Cheers guys!
The desire will only use 500mAh of power regardless of how much is avalible unless the data pins on the usb are shorted.
This means you cannot have fast charging and USB at the same time.
schalmers said:
I am very happy with this one from Proporta
http://www.proporta.com/F02/PPF02P05.php?t_id=5068&t_mode=des
It has a nice support and does a good charge each evening for me. I could not ask for more for 17 euros.
Click to expand...
Click to collapse
A little OT... can you charge second battery with this one?
That dock is exactly what I was looking for. Ordered.
Klutsh said:
Did you even visit the page and read the product description?
Click to expand...
Click to collapse
Read all first!!! "Description The USB Sync-Charge Cradle allows you to make a little home for your PDA on your desktop in the office or at home. This handy product plugs into a standard USB port and includes AC power input with LED indicator for fast charging using your standard AC power supply (not included with this product). "
Therefore it doesn't include the AC adaptor.
The desire will only use 500mAh of power regardless of how much is avalible unless the data pins on the usb are shorted.
This means you cannot have fast charging and USB at the same time.
Click to expand...
Click to collapse
What he said. That is a built-in Desire feature to prevent frying usb ports.
I have made a USB dummy socket with the data pins shorted and when the cradle is not plugged into the PC I have it plugged in this dummy socket to boost the charging. The cradle is powered from an external adapter. I found out that shorting the data pins while the Desire is plugged in cradle will not boost charging, you need to insert Desire in the cradle while the pins are shorted.
EDIT: SCROLL DOWN TO POST #12 WHERE I SHOW YOU HOW TO BUILD YOUR OWN FULL-1900 mAh CHARGER!
http://forum.xda-developers.com/showpost.php?p=43663686&postcount=12
-=========================================
Has anyone used this particular item before? Or can recommend a similar hard-wire unit that operates at 2A to 3A?
http://www.amazon.com/DROK-Converter-Connectors-Adapter-Recorder/dp/B00D6B6CJI
I'm thinking about getting one for my SUV and Motorcyle to charge the S4 at normal 1900 rates like the OEM wall-charger. Get that FAST charge.
Yes, I know about cig lighter chargers. No, that is not what this thread is for.
hello did you buy it?
CZ Eddie said:
Has anyone used this particular item before? Or can recommend a similar hard-wire unit that operates at 2A to 3A?
http://www.amazon.com/DROK-Converter-Connectors-Adapter-Recorder/dp/B00D6B6CJI
I'm thinking about getting one for my SUV and Motorcyle to charge the S4 at normal 1900 rates like the OEM wall-charger. Get that FAST charge.
Yes, I know about cig lighter chargers. No, that is not what this thread is for.
Click to expand...
Click to collapse
I have this hardwired into my WRX:
http://www.ebay.com/itm/CDL-WaterPr...35?pt=US_Power_Inverters_&hash=item1c34627e83
I ran it off the clock circuit (my clock is dead anyways) but any switched 12v source will do. It charges my car integrated Nexus7 without any issues, and at the faster rate.
I have another powering a servo and an aux USB port, but unfortunately I ran so much wire to get it into the center console by the handbrake it charges at USB rates.
paolopaulpaul said:
hello did you buy it?
Click to expand...
Click to collapse
Not yet.
Caferacer said:
I have this hardwired into my WRX:
http://www.ebay.com/itm/CDL-WaterPr...35?pt=US_Power_Inverters_&hash=item1c34627e83
Click to expand...
Click to collapse
Wow, that's a great price! Does it charge at ~1900 rates? Here is an app that will tell you the charging rate:
https://play.google.com/store/apps/details?id=ccc71.bmw&hl=en
Just bought this one for $9 shipped.
http://www.ebay.com/itm/NEW-waterpr...34?pt=US_Power_Inverters_&hash=item3a7a051922
It's a waterproof box so it'll be better on my Motorcycle. I'll let you guys know how it works out by next week sometime.
There was a thread somewhere that explained why some chargers won't do the 1900mah charge. He figured out where and what size resistors to put across the wires to enable it. I think it was in a car dock thread, I'll try and find it.
Sent from my de-Verizonized Galaxy S4, CleanRom style! (using Tapatalk beta 4)
CZ Eddie said:
Not yet.
Wow, that's a great price! Does it charge at ~1900 rates? Here is an app that will tell you the charging rate:
https://play.google.com/store/apps/details?id=ccc71.bmw&hl=en
Click to expand...
Click to collapse
That app won't show the mA on my N7 but does show it charging near the same % as a fast charger.
MonkeyTime said:
There was a thread somewhere that explained why some chargers won't do the 1900mah charge. He figured out where and what size resistors to put across the wires to enable it. I think it was in a car dock thread, I'll try and find it.
Sent from my de-Verizonized Galaxy S4, CleanRom style! (using Tapatalk beta 4)
Click to expand...
Click to collapse
It's the shorting/grounding of the data pins that activates 'fast charge' mode on some phones. Nexus 7's and my E4GT (Sprint S2) when I used it didn't require the pins to be shorted to charge faster. Mostly it was the charger (duh) and the quality/length of the cable that affected the charge speed. As well, most of the heavy 1A plus chargers short the data pins in the charger itself so you can use any cable. I believe the S4 doesn't require it as well, but don't have any data to confirm it.
The way I wired mine was to sacrifice a USB female port from a USB extender, and attached the power leads and shorted the data leads. Figured it couldn't hurt. The converter doesn't care if it's putting out 500mA or 3A. It's not intelligent like some chargers in what current it doles out.
Caferacer said:
shorted the data leads. Figured it couldn't hurt. The converter doesn't care if it's putting out 500mA or 3A. It's not intelligent like some chargers in what current it doles out.
Click to expand...
Click to collapse
Yours is the second post I've seen where someone has shorted the data pins on a charging-only setup. Is there a reason for doing that?
Ehh, n/m. I remembered the "Google before you ask" mantra...
This explains it nicely:
http://forums.androidcentral.com/samsung-galaxy-s3/194362-wont-charge-over-usb-car.html
MichaelBR said:
There are some reasons why it won't work, and some ways to solve it. First, let's understand how it works:
The USB cable has four pins. The inner two pins are where the data goes through. THe outer, power.
When the USB cable is plugged in to a computer, the data pins are connected normally and the phone knows it can only draw certain amount of power
When the cable is plugged in to a charger, the two middle pins are shorted, and the phone knows that it's NOT going to be sendind/receiving data, so it can draw as much power as it can. That's why it charges faster with the charger than when plugged in to a computer
Most chargers short the two pins. Some cables have a switch to do that.
There are different cable cauges as well, with different power capacities.
Some USB chargers, notably car chargers and some low-end (i.e. not good brand) chargers that don't draw from the car/don't give the phone as much current as it needs.
So, if any of below, the phone won't charge, or won't charge fast enough. Or, worse: it may appear as charging, but actually losing battery charge!
Cable too long or incorrect gauge
Middle pins not shorted for some reason
Charger doesn't deliver enough current
And the solutions are:
Don't use cable extensions, cables that are too long. Stick with the cable that came with the phone or with the charger
Get a good car charger, that delivers the right amount of current
I imagine you just got the cable from your original wall charger and plugged it in to the car charger. If you did that, then chances are the cable is OK, and the charger is the culprit. If this is the case, then get a better charger. Check how much current that charger can deliver. Check how much current your device actually needs.
Hope this helps.
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Click to collapse
CZ Eddie said:
Yours is the second post I've seen where someone has shorted the data pins on a charging-only setup. Is there a reason for doing that?
Ehh, n/m. I remembered the "Google before you ask" mantra...
This explains it nicely:
http://forums.androidcentral.com/samsung-galaxy-s3/194362-wont-charge-over-usb-car.html
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Click to collapse
To be clear, there is no indication it is *required* for the S4. Mine quick charges just fine without shorted data leads. However I did this because my friends have a variety of phones and it only took a few minutes to do.
Caferacer said:
That app won't show the mA on my N7 but does show it charging near the same % as a fast charger.
It's the shorting/grounding of the data pins that activates 'fast charge' mode on some phones. Nexus 7's and my E4GT (Sprint S2) when I used it didn't require the pins to be shorted to charge faster. Mostly it was the charger (duh) and the quality/length of the cable that affected the charge speed. As well, most of the heavy 1A plus chargers short the data pins in the charger itself so you can use any cable. I believe the S4 doesn't require it as well, but don't have any data to confirm it.
The way I wired mine was to sacrifice a USB female port from a USB extender, and attached the power leads and shorted the data leads. Figured it couldn't hurt. The converter doesn't care if it's putting out 500mA or 3A. It's not intelligent like some chargers in what current it doles out.
Click to expand...
Click to collapse
Caferacer said:
To be clear, there is no indication it is *required* for the S4. Mine quick charges just fine without shorted data leads. However I did this because my friends have a variety of phones and it only took a few minutes to do.
Click to expand...
Click to collapse
While I agree with what you posted in general terms, below is the link to the thread I was talking about. He did some testing and found the pins aren't just shorted, but shorted w/ 82K resistors to get the maximum charging current.
http://forum.xda-developers.com/showthread.php?t=2274321
Will it damage the phone to have a 3A charger plugged into it? Also If it does not damage would it be able to run the camera as a "blackbox" and not die? I currently have a 2a charger and when i use the black box software it dies after about an hour or so.
SUCCESS!
I got the little black box in from eBay.
Gave it a quick/test wire setup. This is NOT indicative of the end result which will be soldered & have shrink tubing, etc.
Okay, first I grabbed my stock S3 data/charge cable.
Snipped off the standard USB end.
Cut off the ends of the pin 2 & 3 wires since they were not being used anymore (data pins).
Then attached the red (power) from the S3 cable to the yellow (power) lead from the little black box. And did the same for the black (negative) leads.
Then hard wired the red & black from the little black box to my motorcycle battery terminals.
On the first test, I only got 460mAh.
Then I decided to short the 2 & 3 pin wires (green & white) on the S3 cable together (attach them to each other). This gave me 1120mAh!
Next I took the tin-foil and wire braid from the S3 cable and tied them together with the negative lead on the S3 cable. This gave me 1220mAh!
Still not satisfied, I then cut down the 5' S3 cable and made it a 1.5' cable.
AND THIS RESULTED IN A FULL 1920mAh!!!! Right on.
That is exactly the same mAh as the stock S4 wall charger & cable combo give me. Very stoked about this. So now I'll do a nice clean install on the bike and then duplicate it for my car dock sometime soon. FULL CHARGE AHEAD!
Crxdc said:
Will it damage the phone to have a 3A charger plugged into it?
Click to expand...
Click to collapse
No, it will be fine. The phone only draws 1900mAh. If the phone were drawing 3000mAh then there might be a problem.
All done and installed now. And working great!
Negative battery connection (I forgot to shrink tube it but will do that later).
Braided negative wire (~16 to 18awg?) running under gas tank to front of bike.
I wish I would have waited till I got black zip ties in. I hate white zip ties.
The braided wire at the right side of pic that goes up above the gas tank is the pos/neg wire lead that plus right into the phone.
2A inline fuse connecting via blade connector (sorry MC) to a previously used power-on-ignition wire.
This goes to (+) on the little black box.
Note the shrink tube over the braid over the crimp connector (wire goes to top-right of screen).
Phone sitting next to the phone dock I made out of a holster that came with my phone case.
You can see the braided/shrink tubed MicroUSB connector already plugged into the phone.
It's not showing a charge though, because the ignition key is not turned on.
Phone is inserted into stable dock (it will never fall out unless I crash hard).
Ignition is turned on and battery is charging!
And proof that it's charging at the full 1900mAh. Success!
CZ Eddie said:
All done and installed now. And working great!
Negative battery connection (I forgot to shrink tube it but will do that later).
Braided negative wire (~16 to 18awg?) running under gas tank to front of bike.
I wish I would have waited till I got black zip ties in. I hate white zip ties.
The braided wire at the right side of pic that goes up above the gas tank is the pos/neg wire lead that plus right into the phone.
2A inline fuse connecting via blade connector (sorry MC) to a previously used power-on-ignition wire.
This goes to (+) on the little black box.
Note the shrink tube over the braid over the crimp connector (wire goes to top-right of screen).
Phone sitting next to the phone dock I made out of a holster that came with my phone case.
You can see the braided/shrink tubed MicroUSB connector already plugged into the phone.
It's not showing a charge though, because the ignition key is not turned on.
Phone is inserted into stable dock (it will never fall out unless I crash hard).
Ignition is turned on and battery is charging!
And proof that it's charging at the full 1900mAh. Success!
Click to expand...
Click to collapse
Awesome.
Hard wire phone charger and Bluetooth Receiver to car battery plan...
Hello,
I'm planning to install the following in my car along with new stereo head unit:
1) CraigsDocks Samsung Galaxy S4 docking charger, with USB power out
2) Rocketfish Bluetooth Music Receiver (with aptX), with DC 5V power out (connected to 3' 5V to USB power cable)
Plan to use this to convert (found on EBAY - I can't post links here in XDA yet/new user): Dual USB Cable Connectors Power Adapters 8-22V 12 V to 5V/3A DC Volt Converters... to connect directly to my car battery to power both the Samsung charger and the Rocketfish.
I'm new at this and I'm wondering if you all think this will work, or if I'm missing any steps, or if there are other better suggestions?
Thanks for your help!
ebrowni said:
Hello,
I'm planning to install the following in my car along with new stereo head unit:
1) CraigsDocks Samsung Galaxy S4 docking charger, with USB power out
2) Rocketfish Bluetooth Music Receiver (with aptX), with DC 5V power out (connected to 3' 5V to USB power cable)
Plan to use this to convert (found on EBAY - I can't post links here in XDA yet/new user): Dual USB Cable Connectors Power Adapters 8-22V 12 V to 5V/3A DC Volt Converters... to connect directly to my car battery to power both the Samsung charger and the Rocketfish.
I'm new at this and I'm wondering if you all think this will work, or if I'm missing any steps, or if there are other better suggestions?
Thanks for your help!
Click to expand...
Click to collapse
Looks good to me. :good:
http://www.ebay.com/itm/Dual-USB-Ca...064?pt=LH_DefaultDomain_0&hash=item51af639938
ebrowni said:
Hello,
I'm planning to install the following in my car along with new stereo head unit:
1) CraigsDocks Samsung Galaxy S4 docking charger, with USB power out
2) Rocketfish Bluetooth Music Receiver (with aptX), with DC 5V power out (connected to 3' 5V to USB power cable)
Plan to use this to convert (found on EBAY - I can't post links here in XDA yet/new user): Dual USB Cable Connectors Power Adapters 8-22V 12 V to 5V/3A DC Volt Converters... to connect directly to my car battery to power both the Samsung charger and the Rocketfish.
I'm new at this and I'm wondering if you all think this will work, or if I'm missing any steps, or if there are other better suggestions?
Thanks for your help!
Click to expand...
Click to collapse
Just realize that if you wire it to your batter there will be a small draw from the converter and chargers even when not in use. If you let your car sit for a week or long weekend you might come out to find the battery dead. I personally wouldn't wire anything directly to the battery, especially since you didn't mention an inline fuse. Find a switched 12v lead inside the car. Not only does this protect your phone, charger, and car, but it also means you don't have to run anything through the firewall, which is a pain.
You can either tie into the cig lighter wiring, or find something else (I used my clock circuit since it runs to a 10A fuse and is switched).
Caferacer said:
Just realize that if you wire it to your batter there will be a small draw from the converter and chargers even when not in use. If you let your car sit for a week or long weekend you might come out to find the battery dead. I personally wouldn't wire anything directly to the battery, especially since you didn't mention an inline fuse. Find a switched 12v lead inside the car. Not only does this protect your phone, charger, and car, but it also means you don't have to run anything through the firewall, which is a pain.
You can either tie into the cig lighter wiring, or find something else (I used my clock circuit since it runs to a 10A fuse and is switched).
Click to expand...
Click to collapse
Your clock circuit is switched?
I agree with the firewall being a pita, but I'm not a huge fan of tapping on to other circuits either. With nothing charging, what would be drawing any current? If there's anything, it would have to be minimal. It also allows you to charge a phone/device with the car not running, sometimes very handy (and a modification I've made before for just that reason). An inline fuse is also a must, good point!
Sent from my de-Verizonized Galaxy S4, CleanRom style! (using Tapatalk beta 4)
MonkeyTime said:
Your clock circuit is switched?
I agree with the firewall being a pita, but I'm not a huge fan of tapping on to other circuits either. With nothing charging, what would be drawing any current? If there's anything, it would have to be minimal. It also allows you to charge a phone/device with the car not running, sometimes very handy (and a modification I've made before for just that reason). An inline fuse is also a must, good point!
Sent from my de-Verizonized Galaxy S4, CleanRom style! (using Tapatalk beta 4)
Click to expand...
Click to collapse
Yes, my clock circuit has a switched lead to wake up the clock as well as a hard wired lead to retain the time. Both run to the same 10A fuse.
There is a small transformer in the converter and the receiver bluetooth will stay on. They have a small energy draw which is not negligible over a long period of time. At the very least I would include a dash mounted switch to completely shut the charger and receiver off. For instance I have a bluetooth OBD adapter (Not too much unlike your bluetooth receiver) that drained a 2 year old car battery over a week I left the car sitting while I was on vacation. For day to day driving it's not a problem but my OBD adapter isn't hardwired and I can just remove it when I know the car will be sitting.
Thanks
Caferacer said:
Just realize that if you wire it to your batter there will be a small draw from the converter and chargers even when not in use. If you let your car sit for a week or long weekend you might come out to find the battery dead.
Click to expand...
Click to collapse
Oooh, good point! Makes sense to me. I have never done a mod to my car's audio system so I'll be paying a professional installer. I'm so glad to have this information before I shop around at the good places here and get some offers!
Thank you!
Ok, I've tried to search the net before posting but I can't find anything. I have no idea how to use this charger, the actual wire part on the end isn't a usb plug to go into the plug part, it's like an over sized iphone 5 type deal. What do I do as I tried to put it in the plug but didn't want to force it?
Hold charger facing 1+ logo up.
Hold USB cable with the gold-plated contacts facing up
Now push USB cable into Charger.
Is it so difficult?
You put the angled end into the base unit on the side that has the red one.
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Wow such a silly thread hahahahahahahahahahaha
oh lord, its the same as a usual charger
Wooooooooowwwwee
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C-4Nati said:
Ok, I've tried to search the net before posting but I can't find anything. I have no idea how to use this charger, the actual wire part on the end isn't a usb plug to go into the plug part, it's like an over sized iphone 5 type deal. What do I do as I tried to put it in the plug but didn't want to force it?
Click to expand...
Click to collapse
I THINK you talk about the cable not looking like your average USB cable, correct?
While it's a rather uncommon format, I've seen several USB thumb drives in this rather strange format, it fits a normal USB-port perfectly.
The only downside is that you may be able to plug it in the wrong way - resulting in no juice and no data.
Don't like the charger that comes with the OPO the uk adaptor makes it look awful and sticks out a lot. I am going to use my old HTC adaptor that has USB. Currently using my blackberry charger but it seems to be taking ages.
I know this is to do with voltage or whatever, can someone with more knowledge tell me what volts/amps the OPO charger is compaired to other USB AC chargers?
paul211b said:
Don't like the charger that comes with the OPO the uk adaptor makes it look awful and sticks out a lot. I am going to use my old HTC adaptor that has USB. Currently using my blackberry charger but it seems to be taking ages.
I know this is to do with voltage or whatever, can someone with more knowledge tell me what volts/amps the OPO charger is compaired to other USB AC chargers?
Click to expand...
Click to collapse
The OPO Charger has an output of 2Amps. Quick charging..
Likely your older Blackberry chargers have an output and slower charge rate because it is 0.8A or 800mAh
C-4Nati said:
Ok, I've tried to search the net before posting but I can't find anything. I have no idea how to use this charger, the actual wire part on the end isn't a usb plug to go into the plug part, it's like an over sized iphone 5 type deal. What do I do as I tried to put it in the plug but didn't want to force it?
Click to expand...
Click to collapse
Haahaha, don't be worry man I had the same problem when I first got mine. I was just being too cautious, just push the little bugger into your device . In fact I was so cautious i actually put a support ticket in, when I realized i just didn't push the charger piece in all the way i felt pretty stupid.