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That allows the micro usb to put out more voltage to support more usb storage devices that require more than the 100v of power that it puts out by default?
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It's impossible, it's an electronical limit, the device can't do it physicaly, that's all, sorry ^^
So will a powered usb hub work for that type of thing?
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iflip said:
So will a powered usb hub work for that type of thing
Click to expand...
Click to collapse
Yes, it will.
Great. But does the powered hub have to be the type that needs an a/c adapter or can it be a self powered hub? Sorry to be a nuisance with the questions.
Sent from my ADR6400L using Tapatalk
a bus powered hub wouldn't make any sense, would it? how should it get more power than the device can deliver by it's physical limits?
so answer is clear: No, only powered (yes, the ones with own batteries or A/C adapter) hubs will do the job.
I think he was talking about battery powered hub, and i think it could work ^^
Hehe, I can't believe nobody made a joke about saying 100v instead of 100mA.
Anyways, you could also splice 5v into your usb cable, either from a wall wart or from batteries, but if using batteries, I'd use a lithium ion pack and a boost converter, something like a Texas Instruments TPS55065QPWPRQ1.
msticninja said:
Hehe, I can't believe nobody made a joke about saying 100v instead of 100mA.
Click to expand...
Click to collapse
Yeah dude, very funny joke...
chulri said:
Yeah dude, very funny joke...
Click to expand...
Click to collapse
Sorry, I thought I was in the company of nerds here.
Thread moved to proper forum as not development
100mah yea my bad.
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iflip said:
100mah yea my bad.
Sent from my ADR6400L using Tapatalk
Click to expand...
Click to collapse
Lol, no problem. I mix things up all the time. I was just surprised someone hadn't jumped on you for it. But for the record, mA, not mAh. mAh is milliamp-hours, which refers to a batteries capacity, not the amount of current being consumed.
Okay, gotta get the OCD in check and stop correcting people now.
Seriously though, it wouldn't be hard to splice some power into a usb cable. Just slice through the outer sheath, melt a section of the sheathing off the red and black wires, and solder on a 5v wall adapter. Maybe a diode to shunt current only to the drive and not the archos, probably not necessary though.
To use batteries, you'll probably need to regulate the voltage. Most usb MCUs only accept about 4.5v to 6v, so 4 AA batteries(1.5Ah/6v) being drawn at ~400mA would probably sag under 4.5v pretty quickly. Thus, you'd need lithium ion, but you can only get them at 3.7 or 7.2 volts, meaning it would need to be voltage (and amperage) regulated.
Maybe there's enough demand for me to build a prototype and have it produced? It would probably run $40-60 USD if mass produced, but you could build one at home for $20 if you have a spare usb cable.
Hey msticninja
msticninja said:
Seriously though, it wouldn't be hard to splice some power into a usb cable. Just slice through the outer sheath, melt a section of the sheathing off the red and black wires, and solder on a 5v wall adapter. Maybe a *diode to shunt current only to the drive and not the archos, probably not necessary though.
To use batteries, you'll probably need to regulate the voltage. Most usb MCUs only accept about 4.5v to 6v, so 4 AA batteries(1.5Ah/6v) being drawn at ~400mA would probably sag under 4.5v pretty quickly. Thus, you'd need lithium ion, but you can only get them at 3.7 or 7.2 volts, meaning it would need to be voltage (and amperage)...
..........but you could build one at home for $20 if you have a spare usb cable.
Click to expand...
Click to collapse
Are there any links to detailed online instructions on how to build that setup? I really need this. (it would help me earn extra cash)
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I just ordered one of these:
tinyurl.com/3mzzzz5
in hopes to deal with the above problem. It claims to have a built-in battery (in other ads for this product), but unsure of it's capacity (700 mA perhaps). Reading between the lines on other poorly translated ads it claims to be able to power a hard drive (a 2.5" laptop drive I'm assuming). It also comes with a boat-load of adapters to all kinds of small devices, so I figure it might be useful elsewhere if it doesn't work out for this.
Anyway when I get it, I'll report back on how well it works.
Thanks. It looks promising. And if our works I'm definitely gonna get one.
Sent from my ADR6400L using Tapatalk
wartstew said:
I just ordered one of these:
tinyurl.com/3mzzzz5
in hopes to deal with the above problem. It claims to have a built-in battery (in other ads for this product), but unsure of it's capacity (700 mA perhaps). Reading between the lines on other poorly translated ads it claims to be able to power a hard drive (a 2.5" laptop drive I'm assuming). It also comes with a boat-load of adapters to all kinds of small devices, so I figure it might be useful elsewhere if it doesn't work out for this.
Anyway when I get it, I'll report back on how well it works.
Click to expand...
Click to collapse
That's the general idea, but the hub may need drivers that android doesn't have, and don't expect much from the solar cell. I'm guessing less than 100mA in bright sun, but it'll be interesting to see. A 2.5 inch drive should be able to power off the host USB, but if you connect two through that hub, I doubt you'll be able to get a good spin up.
Iflip: This is basically what you want to build: http://www.ladyada.net/make/mintyboost/
You would just need to add another usb port connected directly to the pins of the port he's using to charge from. The "minty charger" would supply the extra mA, and the data pins would connect straight through the two usb ports into the Archos, so you wouldn't have to worry about drivers or anything.
Basically, if you can find any USB charger, and add another port to it, so both the archos and the hard drive can be plugged into the same charger, you'd be golden.(As long as you connect the data pins on both together) You could even add a port to an old Ipod wall charger, anything that provides power to usb devices. You just have to add another port to it, matching the 4 pins, which is easy. +5v to +5v, ground to ground, data + to data +, and data - to data -. I think you get the picture.
iflip said:
That allows the micro usb to put out more voltage to support more usb storage devices that require more than the 100v of power that it puts out by default?
Sent from my ADR6400L using Tapatalk
Click to expand...
Click to collapse
Yes there is.
A very bad a simple hack can provide more than 100mA to the USB port.
I had 1 usb key working and others not working due to this limitation. This got me really upset!
I've search the kernel sources, hacked quickly the kernel, build a new one, flashed it on my A70S running UrukDroid 1.0, and voila! My key is now working (with a 200mA limit on the port instead of 100mA)
Here is the kernel/initramfs for UrukDroid 1.0 build with $auron kernel sources (1.1b3 kernel).
It has Cgroups with cpuacct based on UID grouping (like HTC does on the Desire), but the rest is pretty much standard and is build with $auron's settings.
Flash it with SDE.
Don't blame me tho if you toast your USB port! It's working for me with a USB key, it may not with a USB hdd. I've set the limit to 200mA and not 500.
eagleofdeath13 said:
It's impossible, it's an electronical limit, the device can't do it physicaly, that's all, sorry ^^
Click to expand...
Click to collapse
Are you 100% sure? I'm getting apparently more than 100mA out of my USB to power my greedy USB flash disk
Cheap battery powered USB hub worked with my A70S
So I bought a DTech DT-4012 from tmart.com and it [mostly] worked with my A70s!
It is a cheap solar & battery powered USB hub.
It powered a USB mouse and keyboard just fine. This is real handy especially when you are trying to use the A70 with an external display through the HDMI an HDMI cable. I get a normal mouse pointer and a functional keyboard.
It even powered a 2.5" laptop hard drive, but only for about a minute or two, enough time for at least my A70S so mount the file system, but not much more.
Of course it powered less power hungry things like USB "thumb" drives and card readers fine too, this included ones that the A70 could not power by itself.
The thing contains a [small] 700mA Li-ion battery and a voltage converter that produces a steady 5V out the USB ports for as long as it can. It is possible that the short run time for the hard drive could be an overheating problem with the voltage converter that might be solvable with an addition of a small heat sink. It is also possible that I don't have a full charge on the battery yet (although it claimed it did as the "charging light" went out), but this was the units first time use so the battery might just need some cycling. I'll investigate all these ideas further.
The unit does NOT have a connector for external power but I'm thinking of adding one so I can plug in AC adatpers and/or larger battery packs. This is assuming this is what is needed to get reasonable life running a 2.5" hard drive.
Oh and on the solar cell: I don't expect much power from the approx 2" diameter cell, it would probaby charge a small mobile phone about 1/2 way if you left it out in the sun all day. It is probably more useful as a trickle-float charger for the internal battery as in average ambient light might keep the battery topped off as it is being stored.
Finally the thing comes with all kinds of USB adapter cables for mostly older mobile phones. Could be useful to some.
Does it charge with Micro USB? Or is there separate charger that would allow for simultaneous OTG & charging? If so, is it a samsung proprietary cable?
one port. I don't see why people are all upset with a tablet having one micro-USB port? What I would do to have micro USB on my Asus transformer prime, so damn annoying!
ANd plugging into a PC will charge slowly for most phones, and it depends on tablets, some do some don't. Even then, who leaves their tablet plugged into their PC all day anyways, a big no-no for phones as we all already know, won't charge very quickly...
Are the pogo pins not for charging?
matt11601 said:
Are the pogo pins not for charging?
Click to expand...
Click to collapse
They can charge as well when the tablet is in a dock (if that ever happens...). The pogo pins are not the primary charging method when not in a dock.
Samzebian said:
one port. I don't see why people are all upset with a tablet having one micro-USB port? What I would do to have micro USB on my Asus transformer prime, so damn annoying!
ANd plugging into a PC will charge slowly for most phones, and it depends on tablets, some do some don't. Even then, who leaves their tablet plugged into their PC all day anyways, a big no-no for phones as we all already know, won't charge very quickly...
Click to expand...
Click to collapse
ah.. well for one thing, I would say the primary reason is the one I just stated: simultaneous OTG + charging.
There are users out there that do not like the limitation of having no MicroSD card.. The closest thing, without microSD, is OTG. But the problem is that you cannot constantly use it or the battery will empty [also using battery cycles, that could have otherwise been avoided, and saved for when you really need them].
So may I ask where you got this conclusion? I would like to show it to someone.
Would a usb splitter work if you wanted the device to have two ports? Just a thought.
Initial_G said:
Would a usb splitter work if you wanted the device to have two ports? Just a thought.
Click to expand...
Click to collapse
No, you'd be trying to charge the device, while it is giving out power on the same wires, to the USB OTG device.
The only way to fix it is with a kernel patch to disable outgoing power, and accept a charge with OTG.
Can't you buy an charger that fits the pogo pins. Not from google, of course.
Send from my lovely Sensation XL, from a little town in france with a very very slow internet connection.
If I succeed helping you (rare) don't forget to hit the thanks button
insevanhouts said:
Can't you buy an charger that fits the pogo pins. Not from google, of course.
Send from my lovely Sensation XL, from a little town in france with a very very slow internet connection.
If I succeed helping you (rare) don't forget to hit the thanks button
Click to expand...
Click to collapse
maybe..but on the Nexus 7, when you plugged in OTG storage, it would not charge with the pogo pins--at least I'm pretty sure I read this on xda.
so it might be like this on the Nexus 10 too, I dunno.. I guess we'll find out soon.
mvmacd said:
ah.. well for one thing, I would say the primary reason is the one I just stated: simultaneous OTG + charging.
There are users out there that do not like the limitation of having no MicroSD card.. The closest thing, without microSD, is OTG. But the problem is that you cannot constantly use it or the battery will empty [also using battery cycles, that could have otherwise been avoided, and saved for when you really need them].
So may I ask where you got this conclusion? I would like to show it to someone.
Click to expand...
Click to collapse
I was referring to charging/microUSB ports, had nothing to do with MicroSD card slots
Samzebian said:
I was referring to charging/microUSB ports, had nothing to do with MicroSD card slots
Click to expand...
Click to collapse
No, I meant, you asked why people were upset it just had one micro usb port [instead of--I assume--a charging port, and then an additional micro usb], and I said it is [at least for me] because it makes it harder to properly use external storage [that's needed for some people because of the lack of micro sd].
is there an official spec sheet that shows it charges via its only micro usb port?
Hi everyone, I was wondering what type of micro usb port was on the Nexus 10, I cant seem to find any close up photos, I am a noob when it comes to tablet and smartphones, but after looking around for OTG cables and such for my futur N10, I came accros micro usb type A which is bigger and thicker, and micro usb type B which is nice and thin, so I'm kind of confused, which type do I need for N10, can anyone fill me in?
Sorry if I posted this in the wrong thread, but it would probably of been silly to start one for such an easy question . ^^
mvmacd said:
Does it charge with Micro USB? Or is there separate charger that would allow for simultaneous OTG & charging? If so, is it a samsung proprietary cable?
Click to expand...
Click to collapse
Yes, via a normal charger adapter. The USB cable is pluggable to the charger.
br, josh.
mvmacd said:
ah.. well for one thing, I would say the primary reason is the one I just stated: simultaneous OTG + charging.
There are users out there that do not like the limitation of having no MicroSD card.. The closest thing, without microSD, is OTG. But the problem is that you cannot constantly use it or the battery will empty [also using battery cycles, that could have otherwise been avoided, and saved for when you really need them].
So may I ask where you got this conclusion? I would like to show it to someone.
Click to expand...
Click to collapse
Sorry, but then buy a tablet that has a MicroSD. The Nexus series doesn't have MicroSD. If you don't like that, there are other options.
Hi,
I have read an awful lot of threads regarding this topic but have become more and more confused I have a Nexus 7 3G and have the tablet mounted in my car with a Samsung S3 1TB portable drive using stickmount playing music through Poweramp which is all working beautifully until the battery runs flat. I have unlocked and rooted the tablet using the wugs toolkit and nothing more. I do not know what a kernel really is and people are talking about different kernels and roms to enable charging with a y shaped otg cable but am completely confused by this. Can someone please help me out with a simple explanation on how to do this please? and also anyone know where in the UK I would be able to buy one of these cables? and lastly I have a 2amp use charger through the cars 12v cigarette lighter that I would like to use to charge in this setup...would that be enough or would I have to get a mains inverter? Many thanks for reading...
Anyone?
I think we should probably just have one thread about general install issues. Lets do that here
Sent from my Nexus 7 using Tapatalk
I'm in Thanks flyboy
Sent from my SM-N900P using Tapatalk
My issue is noise while charging. Happens in both my cars, completing different setups, using usb dac in 1 car and the 3.5mm in the other.
Really stuck on this, and not sure where to go to get it fixed
Sent from my Nexus 7 using Tapatalk
flyboy1100 said:
My issue is noise while charging. Happens in both my cars, completing different setups, using usb dac in 1 car and the 3.5mm in the other.
Really stuck on this, and not sure where to go to get it fixed
Sent from my Nexus 7 using Tapatalk
Click to expand...
Click to collapse
I've actually not had much noise while the tablet is charging. But im only using a car charger to charge mine and not a DC-DC since my tablet has constant power. are you using a DC-DC converter?
I've had some noise with music as per my previous postings. I decided to order the Rockford Fosgate BLD Balanced Line Driver which also has a filter in it. My reasoning was I know my DAC was outputting on the smaller side for what my amp could handle so we will see if the filter in conjunction with the voltage increase will make for better sound.
On another note, anyone made progress with backup cameras, preferably using the Febon Grabber?
I'm using a car charger in 1 car, and a pico psu in the other. Doesn't matter what i use, i have tried 2 different usb chargers, multiple cables, a dc dc converter. It doesn't matter, at this point I mm thinking it is my tablet.
Subaru:
Pico psu, uca 202 dac, alpine ktp445u, no head unit
Buick:
Palm usb charger ( best i've ever owned), 3.5mm output, pioneer 740mp, no amp. My note2 works flawlessly in this car.
Sent from my Nexus 7 using Tapatalk
Not sure if I should just order usb isolator like hifimediy sells or a new dac with one built in. Kinda sick of buying parts
Sent from my SCH-I605 using Tapatalk
Yea I would be interested to see if that fixes the issue.
Sent from my SM-N900P using Tapatalk
Im guessing it will, a normal ground loop isolator will fix it too, but it shifts the noise into distortion on my tweeters. So that really isn't fixed imho.
Sent from my SCH-I605 using Tapatalk
I also had some problems with ground loop, but i think i've fixed it.
After i have tested the DAC by plugging in a headphone, i noticed that the noise didn't come from the DAC itself, but from the analog part on the output.
I'am using an amplifier in the trunk that is very near my DAC, i just used an usb extension cable from the usb hub (near the nexus) to my amplifier in the trunk.
then i only use an 15 cm rca cable to connect the dac to the amp (high quality rca cable) and my noise is completely gone.
I just kept the analog part as short as possible and it worked for me.
flyboy1100 said:
My issue is noise while charging. Happens in both my cars, completing different setups, using usb dac in 1 car and the 3.5mm in the other.
Really stuck on this, and not sure where to go to get it fixed
Sent from my Nexus 7 using Tapatalk
Click to expand...
Click to collapse
I'm using a $15 power inverter and the stock Asus wall wart charger to power the tablet, joycon, hub, usb dac. No ground loop noise. :good:
strikeitup said:
I also had some problems with ground loop, but i think i've fixed it.
After i have tested the DAC by plugging in a headphone, i noticed that the noise didn't come from the DAC itself, but from the analog part on the output.
I'am using an amplifier in the trunk that is very near my DAC, i just used an usb extension cable from the usb hub (near the nexus) to my amplifier in the trunk.
then i only use an 15 cm rca cable to connect the dac to the amp (high quality rca cable) and my noise is completely gone.
I just kept the analog part as short as possible and it worked for me.
Click to expand...
Click to collapse
Thanks a lot for the info I might also run a USB cable under the carpet to the amp. Only want to have all the seats out once!
Gilmour509 said:
I'm using a $15 power inverter and the stock Asus wall wart charger to power the tablet, joycon, hub, usb dac. No ground loop noise. :good:
Click to expand...
Click to collapse
I tried the drok converter, that wasn't the problem. The problem is in my lte nexus 7.
I don't remember noise when I had the wifi only, so it is probably something to do with the radio and the charging circuit, or I just happen to get a subpar charging circuit. Either way my noise is originating in the nexus internal circuitry.
Sent from my SCH-I605 using Tapatalk
Is any one using a HD tuner for their installs. Specifically the directedhd tuner? I saw a 2012 installation with the tuner but nothing of the 2013 version. I have one laying around.
Anyone looking for a cheap dac? I'm going to sell my uca202. It works great, sounds good, just want to try something different. Thinking 20.00 shipped, only 2 months old
Sent from my SCH-I605 using Tapatalk
Does anyone have issues with there tablet randomly restarting? I don't get it to often but just enough to be frustrating. I running Timur's kernel but don't think it is related to that. I am guessing it is the cheap power supply I am running it off of at the moment. Anyone run into this and figure out a fix?
tjl_48 said:
Does anyone have issues with there tablet randomly restarting? I don't get it to often but just enough to be frustrating. I running Timur's kernel but don't think it is related to that. I am guessing it is the cheap power supply I am running it off of at the moment. Anyone run into this and figure out a fix?
Click to expand...
Click to collapse
Is it overheating?
Sent from my SCH-I605 using Tapatalk
Shouldn't be. I live in Minnesota and it's not to warm out yet. This morning it restarted after a minute or 2 of driving and it was only maybe 60 out.
What extras or what rom are you running?
Sent from my Nexus 7 using Tapatalk
Btw, figured out how to program my m3-atx the other day. It now shuts down after 7 seconds, i couldn't get it to go shorter than that, it allows my amp to turn off before my dac so no more popping on start or shutdown!
Just need my usb filter and i can finally mount everything. Hopefully it shows up before the weekend.
Last thing to do will be to program tasker and a few nfc tags.
Sent from my Nexus 7 using Tapatalk
They have the right chips. I read the actual quick charge 2.0 will charge faster than the fast charge the phones come with. But then I thought, since the chips are there, would some simple mods make this work?
delete this someone ......answered my own question
Hmmm... interesting question...
When thinking back to how certain kernels could enable faster charging when connected via USB to pc, maybe this is possible...
Sent from my Nexus 5
Quick Charge by Qualcomm ups the voltage to as high as 12V, I believe. The fast charging in the new Nexus line is at a constant 5V. If the phone's internals (which goes way beyond just having a Qualcomm CPU) is unable to handle increased voltages, well... I'll remind you that lithium is a reactive alkaline metal. Burns and skin grafts hurt.
Elnrik said:
Quick Charge by Qualcomm ups the voltage to as high as 12V, I believe. The fast charging in the new Nexus line is at a constant 5V. If the phone's internals (which goes way beyond just having a Qualcomm CPU) is unable to handle increased voltages, well... I'll remind you that lithium is a reactive alkaline metal. Burns and skin grafts hurt.
Click to expand...
Click to collapse
This makes buying chargers so difficult. I was on Amazon just to see if I could find a car charger for this and it is difficult to know what won't blow up your phone.
It won't blow up. =)
jackdubl said:
This makes buying chargers so difficult. I was on Amazon just to see if I could find a car charger for this and it is difficult to know what won't blow up your phone.
Click to expand...
Click to collapse
I would hold off on buying anything just yet. It looks like USB-C to USB-C will be the only way to take advantage of 3A/5V (15W) charging.
osi13 said:
I would hold off on buying anything just yet. It looks like USB-C to USB-C will be the only way to take advantage of 3A/5V (15W) charging.
Click to expand...
Click to collapse
It looks like USB 3.1 USB-C to USB-C will be the only way to take advantage of 3A/5V (15W) charging.
Fixed.
USB-C, aka - USB Type-C, is the plug type. USB 3.1 is the bus standard with correct voltage/amperage outputs.
Elnrik said:
It looks like USB 3.1 USB-C to USB-C will be the only way to take advantage of 3A/5V (15W) charging.
Fixed.
USB-C, aka - USB Type-C, is the plug type. USB 3.1 is the bus standard with correct voltage/amperage outputs.
Click to expand...
Click to collapse
That's pretty much exactly what I said. Here is the best guide I've seen explaining everything.
https://www.reddit.com/r/Nexus6P/comments/3nyd8k/20151008_the_final_word_on_the_nexus_6p5x_fast/
AFAIK USB 3.1 has nothing to do with it.
osi13 said:
That's pretty much exactly what I said. Here is the best guide I've seen explaining everything.
https://www.reddit.com/r/Nexus6P/comments/3nyd8k/20151008_the_final_word_on_the_nexus_6p5x_fast/
AFAIK USB 3.1 has nothing to do with it.
Click to expand...
Click to collapse
Ah, yes, I see what you're saying. I just read the spec docs from USB.org about it. Type-C is truly defined outside of the USB 3.1 specs. The USB 3.1 spec sheet makes no reference to Type-C in section 5.2.1.
Haven't made it through the type-c spec doc yet. I'll keep reading.