im not a pro at electronics but isnt it possible to solder a charging plug to a usb cable?
to achieve usb charging?
did it for a homemade IR headtracking unit
SmokeMasta said:
im not a pro at electronics but isnt it possible to solder a charging plug to a usb cable?
to achieve usb charging?
did it for a IR headtracking unit
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I still don't think people understand. This devices needs more output then a usb plug can produce. Think about it this way, would you charge your laptop computer off your desktop usb port? The XOOM requires a 12v charge, just like your laptop.
bwcorvus said:
I still don't think people understand. This devices needs more output then a usb plug can produce. Think about it this way, would you charge your laptop computer off your desktop usb port? The XOOM requires a 12v charge, just like your laptop.
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wont it be able to trickle charge... when in a pinch some charge is better then none at all
What don't people understand about this. A USB plug in a computer might only be able to produce 500ma, but you can plug that SAME USB cable into a wall charger that uses USB and it will charge fast as hell. The iPad does this. All Android phones do this. It makes it so you only have to carry one cable and maybe a small wall plug.
deleted this
bwcorvus said:
The usb port is not connected to the battery for charging anyway.
https://motorola-global-portal.cust...sion/L3RpbWUvMTI5ODgyOTM5NS9zaWQvdnpSbGhIbms=
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guess you missed prev poster point ... if you solder on a charging plug it doesnt mean you need to remove the other plug have 2 plugs on one side
SmokeMasta said:
guess you missed prev poster point ... if you solder on a charging plug it doesnt mean you need to remove the other plug have 2 plugs on one side
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You are right i miss read it
after some reading usb 3.0 delivers 900ma
and it looks those usb charger blocks deliver upto 9w at 1.8a
It is hard to say if it will work. Since I don't have my Xoom yet, I can looking at the output rating of the wall charger. Maybe someone can look at their wall charger and see how much output voltage and current it produces. If it's higher than 5V, the USB might not be able to charge it. If it could charge it, it would be better to have a USB cable that has one end split into two connectors, one with the circular connector, and one with the micro USB end.
ggoldfingerd said:
It is hard to say if it will work. Since I don't have my Xoom yet, I can looking at the output rating of the wall charger. Maybe someone can look at their wall charger and see how much output voltage and current it produces. If it's higher than 5V, the USB might not be able to charge it. If it could charge it, it would be better to have a USB cable that has one end split into two connectors, one with the circular connector, and one with the micro USB end.
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Here you go.
looks like my usb 1.0 charger (from htc (ancient thing)) delivers 5v at 1amp
wondering if newer chargers deliver more. spec sheet of USB 3.0 says it can deliver 9 volt at 1.8 amp
hopefully the EU classifies the moto tablet as a telephone then its obligated by law to have usb charging ability
The iPad charger delivers 5v at 2 amps over a USB to 30pin cable.
bwcorvus said:
Here you go.
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Thanks. I just decided to glance at the Xoom teardown. From what I saw with the hardware, I don't think it will be possible to use USB to charge it. The battery alone is 7.4V, so there is no way to charge it with 5V unless the Xoom had a DC step-up convert. The teardown only lists a step-down converter which probably steps the battery voltage down for all of the components in the Xoom and has nothing to do with battery charging.
ggoldfingerd said:
Thanks. I just decided to glance at the Xoom teardown. From what I saw with the hardware, I don't think it will be possible to use USB to charge it. The battery alone is 7.4V, so there is no way to charge it with 5V unless the Xoom had a DC step-up convert. The teardown only lists a step-down converter which probably steps the battery voltage down for all of the components in the Xoom and has nothing to do with battery charging.
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Does it require the same voltage to do a trickle charge? From the research XDA members have done so far, the Xoom charger requires 1.5A, USB puts out .5A, that's not too far off if we just want trickle charging.
The battery is 7.4V but 5V isn't too far off either.
Does the market app SPARE PARTS work on the Xoom, or some other charging monitor app?
Maybe someone who already has the Xoom and knows how to solder can frankenstein a USB charging adapter? Make one end fit into the charging port of the Xoom and the other end fit into a standard micro USB plug.
This way, you carry your normal USB cable for data transfer but if you need to charge, then you plug the USB plug into the adapter which plugs into the charging port.
BTW, can someone please clarify that the charging port IS THE ONLY WAY to charge the Xoom? Someone said on here that the docking device has a USB plug that will charge the Xoom thru the USB?
Neo3D said:
Does it require the same voltage to do a trickle charge? From the research XDA members have done so far, the Xoom charger requires 1.5A, USB puts out .5A, that's not too far off if we just want trickle charging.
The battery is 7.4V but 5V isn't too far off either.
Does the market app SPARE PARTS work on the Xoom, or some other charging monitor app?
Maybe someone who already has the Xoom and knows how to solder can frankenstein a USB charging adapter? Make one end fit into the charging port of the Xoom and the other end fit into a standard micro USB plug.
This way, you carry your normal USB cable for data transfer but if you need to charge, then you plug the USB plug into the adapter which plugs into the charging port.
BTW, can someone please clarify that the charging port IS THE ONLY WAY to charge the Xoom? Someone said on here that the docking device has a USB plug that will charge the Xoom thru the USB?
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Spare parts works fine, so does battery monitor widget. The dock uses the 2 metal pins between the hdmi and charging hole.
My HTC charger outputs from the AC adapter to microusb at 5V and 1.0A, which is as high as I've seen with other phones and chargers.
The Xoom charger appears to output 12V at 1.5A.
I'm no electrician but that does seem like a pretty big difference. 140% greater in and 50% greater respectively.
A lot of armchair electrical engineers in here. Tell me, what would you gain from creating your own proprietary usb charger? You'd still have only one of them and you couldn't use it on anything else.
Has anyone stopped to think that it's very highly likely that the usb charging pins aren't hooked up at all inside the xoom?
This forum is the biggest group of whiny people I've ever encountered, and I once accidentally walked into a GoP fundraiser.
Neo3D said:
Does it require the same voltage to do a trickle charge? From the research XDA members have done so far, the Xoom charger requires 1.5A, USB puts out .5A, that's not too far off if we just want trickle charging.
The battery is 7.4V but 5V isn't too far off either.
Does the market app SPARE PARTS work on the Xoom, or some other charging monitor app?
Maybe someone who already has the Xoom and knows how to solder can frankenstein a USB charging adapter? Make one end fit into the charging port of the Xoom and the other end fit into a standard micro USB plug.
This way, you carry your normal USB cable for data transfer but if you need to charge, then you plug the USB plug into the adapter which plugs into the charging port.
BTW, can someone please clarify that the charging port IS THE ONLY WAY to charge the Xoom? Someone said on here that the docking device has a USB plug that will charge the Xoom thru the USB?
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Well the current rating is only part of the equation. Think of the voltage as the pushing force for the current. The Xoom has two Li-Po packs (two batteries) with a nominal voltage of 7.4V. It really depends on the battery, but in general for Li-Po's, the minimum voltage for this battery will be something close to 6V. Li-Po's require specific ways of charge with min/max voltages and certain currents. The minimum battery voltage cannot be overcome by the 5V from USB, thus it will not charge the battery.
If anything, the 5V could power the device, but it wouldn't charge the battery. I would bet that this doesn't work. The power jack on the Xoom probably goes into a regulator that reduces the 12V into a lower voltage that charges the Xoom.
gbenj said:
My HTC charger outputs from the AC adapter to microusb at 5V and 1.0A, which is as high as I've seen with other phones and chargers.
The Xoom charger appears to output 12V at 1.5A.
I'm no electrician but that does seem like a pretty big difference. 140% greater in and 50% greater respectively.
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I don't see how you see it as whining, we're just figuring out how to get things we want ourselves instead of waiting for the manufacturer to do it for us
Most of XDA's reader probably have some kind of techincal/engineering/IT/industrial background. Nothing wrong with pooling our talents to solve manufacturers' shortcomings.
USB Charging
Just tried to charge it VIA USB and wall charger with USB port & this is the result.
Ive read through several pages about what it takes to charge the tablet because of the amperage. Will this car charger work so I could also use it for other things?
Maybe even find a charger with dual output? Or will the output be to strong for the other device I want to use it for? Sorry if it has been answered and I didnt find it.
Just got this and have several question but will search for each one.This is the one Im talking about. Although it is a usb cable it actually has the output for the charging pin.
http://www.amazon.com/NTK-BULLET-PU...HT3I/ref=sr_1_7?ie=UTF8&qid=1335607688&sr=8-7
for what its worth, it would seem a badly thought out item and very risky.
its very unlikely that any other items would use a usb 12volt port and could you really manage with a 18" charging lead, if so glue the lead in the units port to save any major blow ups. personally i would buy a specific unit and should be cheaper aswell.
If you are worried about amperage, the 2A is the max available, the a500 draws less than this and will only draw what it needs.
Hope this helps.
I have not done much research to find out why, mainly because most discussion is in Chinese. It seems that the device cannot charge properly without the stock Meizu cable. Does anyone know why this is? It appears to be a standard MicroUSB cable.
I'm using a Kindle Fire charger right now and it's charging fine.
Sent from my M030
and the stock white cable right? Charging off various sources isn't a problem. The problem is the cable.
AdamOutler said:
and the stock white cable right? Charging off various sources isn't a problem. The problem is the cable.
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My Meizu cable is black and that works just fine as well
Sent from my M030
If you can give me the link to the Chinese discussion, I can translate and roughly summarise the discussion and findings (if any) for you.
It might be just like the Nexus 7 discussions where people think the magic is the cable, but then you find out that when they change the cable they also were using an iPad charger...
Don't you have an MX Adam? Easy enough to test a few combos.
Charges fine on both my lg, Meizu and any other micro usb cable.
The charger is the magic here...
This device needs 2amp input to charge properly.
If your charger can't provide this you get flicker charges.
I think MrColdbird is more-or-less right.
My Meizu MX (4-core) charger looks like it's rated at 1.2A. Charging with a lower-power charger usually does not work, and even my portable battery pack with its 1.5A output only works while the external battery is at least half-full.
However, I also have a couple of 0.5A chargers that seem to work OK, and it charges OK from the USB ports on my laptop, which I think are 0.5A. All-in-all, it's very choosy when it comes to chargers! But you're right, the cable isn't really the issue.
Charlie
I don't know what's going on. I'm using a Nexus7 charger, a samsung charger and my computer. All three require the Meizu-White cable. Standard MicroUSB fails.
Are you guys using CN or HK versions? Mine's an HK.
Should be easy enough to test. Just measure for any resistance between the pins on the uUSB side of the completely unconnected cable. If you find any resistance between GND and ID, or between any other pins, they're playing games with us!
HK here to Adam.
So this adds to the mystery as well.
i got the mx032 as well, and the problem is the charger.
works with my following chargers:
-htc 12V (1A)
-ipad (2.1A)
-sony xperia (850mA)
-motorola milestone
doesn't not work with:
-samsung travel adapter (700A)
-noname 12V (1A+2.1A)
E:V:A said:
Should be easy enough to test. Just measure for any resistance between the pins on the uUSB side of the completely unconnected cable. If you find any resistance between GND and ID, or between any other pins, they're playing games with us!
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Sometimes, I have such a situation
My M031 charges with Nexus 7 charger and cable.
I was wondering what kind of accessories can make use of the POGO pins in the nexus 10?
Other than Charging docks, can we expect in the future keyboard covers, like the one introduced in the Microsoft Surface?
Short answer: Currently unknown.
Valynor said:
Short answer: Currently unknown.
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Longer answer: There is supposed to be a pogo pin fast charger coming out sometime in the *near* future.
What other devices have POGO pins and accessories? If they fit wouldn't they work? I can connect a mouse with a USB adapter. Wouldn't POGO work similarly?
Would like to see a small slim flash drive magnetically attach to pogo pins. Wouldn't want to knock it off during read write though.
Sent from my SAMSUNG-SGH-I717 using Tapatalk 2
Something like this, which doesn't exist:
http://forums.androidcentral.com/google-nexus-10-tablet-forum/225484-pogo-charger.html
ShanMan14 said:
Something like this, which doesn't exist:
http://forums.androidcentral.com/google-nexus-10-tablet-forum/225484-pogo-charger.html
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That is a pretty kick-azz photoshop job. It's got to be somewhere and someone is going to hake money with it. Guaranteed! But surely the Nexus 10 is not the only device with POGO pins and surely there must be other peripherals that connect with POGO pins, don't you think?
I want to know if is it "technically possible" to have keyboard cases or docks which make use of that POGO pins or not?
As the title says, has anyone tried using a chromebook charger with their V20? Picked up an Asus C302sa and it uses a 45W usb-c charger. It would be nice to carry just the one but I don't want to fry my phone. Thoughts? Or am I about to be a guinea pig? (I guess if it comes down to it, I can just throw my spare battery in before attempting and hope that's the worst of it.)
I've used a Targus usb c laptop charger and the Anker USB PD on my V20. It works great. If you look on the output info of the charger, you should see a range of values (maybe just 2 for cheaper chargers). Usually there's one high wattage for laptops and one low wattage for phones/accessories.
Thanks! I'll have to see if I can find a magnifying glass to read the print.