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Desire DC - microUSB - internal resistance

Hi, I'm planning to build my own docking station and need some informations about the HTC Desire micro USB connection and the internal resistance of it!
The USB charger by HTC in Europe has 5V @ 1A max and I have original standard battery.
I've only one microUSB cable now (none to cut) and the connector is to little for my multimeter
Or is there a technical information data sheet for the Desire by HTC?! That would be awesome!!!
Thanks in advance for every hint!

I would definitely go for the official agreed specifications, as microusb is an EU standard agreed among manufactures. It would suggest that the pinout is also standardized and available. Google it.
Sent from my HTC Desire using XDA App

_stefans_ said:
I would definitely go for the official agreed specifications, as microusb is an EU standard agreed among manufactures. It would suggest that the pinout is also standardized and available. Google it.
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
Hi Stefan,
Thanks for your quick answer, I checked the USB specifications at www.usb.org already and also the pinout. But I don't want to damage the battery. It seems that there are a lot of different chargers for all the microUSB smartphones.
I will build my own charger, so I cannot buy a standard charger for microUSB - That's because there will be some extra features and It's also a project to learn something for university
An E-Mail to HTC is out - hope they give me some technician sugar
If not, I'll buy a cheap micro USB cable, cut it and let my multimeter do the work...

brianius said:
Hi Stefan,
Thanks for your quick answer, I checked the USB specifications at www.usb.org already and also the pinout. But I don't want to damage the battery. It seems that there are a lot of different chargers for all the microUSB smartphones.
I will build my own charger, so I cannot buy a standard charger for microUSB - That's because there will be some extra features and It's also a project to learn something for university
An E-Mail to HTC is out - hope they give me some technician sugar
If not, I'll buy a cheap micro USB cable, cut it and let my multimeter do the work...
Click to expand...
Click to collapse
if it helps at all i also use a micro usb cable from a Nokia without any issues so i would assume the pinout is the same and standard.

coriron said:
if it helps at all i also use a micro usb cable from a Nokia without any issues so i would assume the pinout is the same and standard.
Click to expand...
Click to collapse
Thanks coriron! That's good to know
If somebody needs service manuals: http://www.mikechannon.net/page1.html (nearly all HTC devices, but Desire and Nexus One)
If anybody has the servie manual for Desire/Bravo or even N1 pls post it here.
The main problem here is, that i don't know the internal resistance while loading the battery. Maybe i can only check the battery with my multimeter, but I think the battery is not the only thing connected to the microUSB while loading...so there is a risk to damage something...and I don't want to buy a new Desire
edit: and of course I want the maximum loading power - and there are chargers between 4-12,5V/0,2-1A - (I've seen so far)
edit2: Okay, found some infos about the chargers - when plugged into PC there is communication through the 2 data channels (D- and D+) - When loading on charger it can happen that there is no charging (because of missing information through data channels) - so one has to connect D+ and D- with Gnd - like in most third party usb chargers! Then it should work. Maybe that helps someone later...
edit3: If someone is interested - one possibility to build a charger (european symbols!):
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brianius said:
edit2: Okay, found some infos about the chargers - when plugged into PC there is communication through the 2 data channels (D- and D+) - When loading on charger it can happen that there is no charging (because of missing information through data channels) - so one has to connect D+ and D- with Gnd - like in most third party usb chargers! Then it should work. Maybe that helps someone later...
Click to expand...
Click to collapse
Already had this problem a few couple of weeks ago with the car charger i got for the desire. All i did was open the charger up and short the 2 data pins (middle pair) together, not to ground, and it works fine and i now get the full current instead of the usb limit.

why don't you plug a normal usb jack into the htc original charger and measure everything you want to know?
it should be cheap (you must have some unused cables around) and you have enough space to use the mutlimeter.

USB mini to Regular Female USB ?

I just recently bought this adaptor for my TF700.
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.
It works great for me as a Mass USB reader and wireless mouse or keyboard ... BUT ... the way it plugs into the big slot on the bottom of the tablet is not very safe. With the USB stick plugged into it, it sticks out like 4 inches.
I am afraid it is going to break off soon ! I am looking for a cable to do the same thing, but would plug into the mini usb port on the side of the tablet, not the big connector at the bottom. Is there such a cable for this device ?
I have a mini to regular USB for my Kindle Fire but the mini port is different then the one on the Asus.
I know this is a question, but I think it is more of an accessory related item ... so I hope it's in the correct forum :fingers-crossed:
Thanks for any replies !
Ps. I do not have the docking station.
.

Ah,
Bought one of them things too.
Hardly ever used it...I searched for a dongle cable for a couple of days then gave up.
I'll probably blow more money on the $90.00 connect dock if I can find one.
Seems like if we want have a connection options your kind of cornered by Asus.
Maybe the keyboard dock is the way to go

USB Adapter
Thats OK said:
Ah,
Bought one of them things too.
Hardly ever used it...I searched for a dongle cable for a couple of days then gave up.
I'll probably blow more money on the $90.00 connect dock if I can find one.
Seems like if we want have a connection options your kind of cornered by Asus.
Maybe the keyboard dock is the way to go
Click to expand...
Click to collapse
The subject has been brought up previously. With the capability of screen rotation, all you have to do is rotate the tablet 180 degrees so it sits on top.

brinnonbob said:
all you have to do is rotate the tablet 180 degrees so it sits on top.
Click to expand...
Click to collapse
Good thinking that is one solution.
I'm afraid it put's too much bind on the tablets plug.
Stress and fear of damage are the main reasons I rarely use this.

What mini USB slot? That's a micro HDMI slot, and it's output-only...
"Pad:
1 x 2-in-1 Audio Jack (Headphone / Mic-in)
1 x micro HDMI
1 x Micro SD Card Reader"
The only USB connector in this tablet is in the dock.

Has anyone tried to use the charger cable and a USB gender changer?

MHL For Pioneer AppRadio3

Hey guys.
This thread is about my Galaxy Note Edge but since it is basically the same as your Note 4's and this forum is more popular I thought someone might be able to assist me quicker
Before my Galaxy Note Edge I had the original Galaxy Note (N7000) and connected it via MHL to my Pioneer AppRadio to fully mirror my phone and it worked perfectly.
The Pioneer Android kit looks like this and comes with MHL...
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So today I tried to connect my Edge to the AppRadio and it does not work :crying:
I have checked the power and when I connect the MHL power cable to my phone my phone charges so that is fine.
I have tried connecting my Sony Bravia TV to my Edge via MHL using a 'fresh HDMI cable' and it doesn't do anything.
Is the Pioneer MHL incompatible with the Edge (is it a 1st generation MHL) and the Edge can only use the current 3.0 generation OR is the Pioneer MHL compatible but mine is broken? Is the Note 4/Edge backwards compatible?
I really appreciate your help.

I have a note 4, and the appRadio 3 also.
You will require to use the Samsung MHL adapter as the phone requires 11 pin connector for the video output.
I tried many 3rd party adapter, but neither of them are stable. So, I just stick to the OEM one.
Just connects this adapter to the HDMI cable and the USB powered cable and you are good to go.
Hope that helps.
Benny

Thanks for your informative reply.
Having conducted some more research I have found the following:
The original Samsung MHL adapter for smartphones. Released in 2011 for the Samsung Galaxy S2, this adapter has a 5 pin layout. External power is required.
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Click to collapse
I believe the Pioneer MHL provided is Generation 1 (5Pin)
Compatibility with 2nd generation phones is possible with 5-11 pin adapter.
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Click to collapse
The Edge needs an 11pin, like you said and the 5pin will not work on its own and so rather than use a rubbish adapter I have ordered the below.

This is the one I use and works great. I had a Samsung one, but the way the micro USB for charging plugs into the same side as the MHL connection to the phone is awkward. Also, the USB on the back of the head unit doesn't put out enough juice to charge the phone while running GPS/streaming and the like. So with this you have a little extra length to plug into a fast charger if you want, and run the MHL cable to a convenient spot since its a LOT thinner than an HDMI cable from the back.
http://www.amazon.com/gp/product/B00MY05GNA/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

johnboy693 said:
This is the one I use and works great. I had a Samsung one, but the way the micro USB for charging plugs into the same side as the MHL connection to the phone is awkward. Also, the USB on the back of the head unit doesn't put out enough juice to charge the phone while running GPS/streaming and the like. So with this you have a little extra length to plug into a fast charger if you want, and run the MHL cable to a convenient spot since its a LOT thinner than an HDMI cable from the back.
http://www.amazon.com/gp/product/B00MY05GNA/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Click to expand...
Click to collapse
Thanks for the advice. My original Galaxy Note charged to 100% when under full load with the standard power from the AppRadio. However your right in saying that the new Samsung MHL adapter will ruin my set up because during installation the HDMI/USB Power are in the same 'section' of the centre console and I can't stretch the USB power cable without an extension lead.
So I will use the below that I have fitted in the centre console for power.
So although I won't know if my Edge would drain using the AppRadio power (my N7000 did not do this) this is rated @ 3.6A / 18w and it should be fine.
I have just seen on Amazon that you can now get 4.2A / 20W car chargers which is crazy!
My new Samsung MHL device will arrive sometime today (thanks to Amazon Prime). So I will let you know what happens and take a picture of my current set up.
Ps. When you say 'Fast charger'... what in car charger or power output (e.g. 3.6amps) would you consider being equivalent to our home wall plug fast charger?

has anyone tried usb type c to hdmi cable accessories?

im trying to connect note 7 to my head unit via hdmi.
and i found this little bad boy
http://www.aliexpress.com/item/Type...66.html?spm=2114.13010208.99999999.261.jEk3Ct
would this cable work for galaxy note 7 ? if not, is there any cable that i can transfer to othr screen via hdmi? let me know thanks!

I bought this and no dice. Usb works but no hdmi. Also it won't charge and use USB at the same time. Luckily wireless charging still works.
No MHL on the note 7. Samsung dropped it in favor of miracast / screen cast. Luckily though a Chromecast will do the trick for 35$. Aside from that you could get a miracast dongle. Haven't used those yet so i cant speak on how well they work.
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pyraxiate said:
I bought this and no dice. Usb works but no hdmi. Also it won't charge and use USB at the same time. Luckily wireless charging still works.
No MHL on the note 7. Samsung dropped it in favor of miracast / screen cast. Luckily though a Chromecast will do the trick for 35$. Aside from that you could get a miracast dongle. Haven't used those yet so i cant speak on how well they work.
Sent from my SM-N930T using Tapatalk
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well i've been using smart view to connect note 7 via miracast, but it lags compare to wired connection. same with chromecast also. it connects fine, but lag is my main issue.

Weird.....im getting no lag. Movies play fine buffering from my phone using localcast app. Some MKV movies play a bit choppy but that's the codec I think.
It's a shame because 4x usb and hdmi on 1 adapter is awesome if it all worked. Also, the phone wont charge using it. I am able to wireless fast charge though.
Sent from my SM-N930T using Tapatalk

You tried installing the displaylink software on your phone and trying again?
I think these docs are displaylink certified. I have one in my office i will give it a go
---------- Post added at 04:05 PM ---------- Previous post was at 03:56 PM ----------
I just tried it on the dell branded usbc one i have spare in my office with the display like app installed it doesnt work for the display on the note7
It works on the older one with my note3 though

Again. Note 7 dropped MHL. There is no physical link from gpu to the USB port if I'm reading correctly. I wish it wasn't so.
Sent from my SM-N930T using Tapatalk

Wasn't HDMI or display port (not sure which) part of USB-c specs? If so, Note 7 usb-c port is out of spec, we need some software, or maybe it's HDCP, I don't think Display Port is certified for HDCP content, at least not by MS.

playing video and music is perfectly fine, but i need to connect this to my head unit and emulate touch as well from head unit. when note 7 is connected via smartview, theres about 1 second delay and its really annoying. so i was looking for a wired option instead of miracast....

evank418 said:
playing video and music is perfectly fine, but i need to connect this to my head unit and emulate touch as well from head unit. when note 7 is connected via smartview, theres about 1 second delay and its really annoying. so i was looking for a wired option instead of miracast....
Click to expand...
Click to collapse
Ah makes sense. My HU is a full blown quad core ( rk3188 ) android Radio with play access. I just tether and use the apps on the HU. I never tried the screen mirror app via USB but I will try later this evening to see if it lags
Sent from my SM-N930T using Tapatalk

It's there any external DAC that works with the Pixel XL?

Hello, just got the XL. Has anyone tried using external DAC/Amp like the Audio Quest Dragonfly with the OTG dongle or found any that works?

lc084302 said:
Hello, just got the XL. Has anyone tried using external DAC/Amp like the Audio Quest Dragonfly with the OTG dongle or found any that works?
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Dragonfly works fine here .. No issues.
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Thanks!

Behringer UCA-202 works with every USB-OTG capable phone I've ever tried it on.
And it's only like $25 and sounds good.

CZ Eddie said:
Behringer UCA-202 works with every USB-OTG capable phone I've ever tried it on.
And it's only like $25 and sounds good.
Click to expand...
Click to collapse
>behringer
no thanks
OP I've heard good things about this one https://www.amazon.com/dp/B015JESV4S/ref=psdc_13880161_t1_B01DFMV4NQ

I am hoping for a USB-C DAC with Power Delivery passthrough, for car audio whilst charging. I did consider using a USB-C Power Delivery HUB, but it would have been a bit of a mess. So Bluetooth for now while I wait and hope.
Or if manufacturers have the imagination ..
a USB-C PD car charger with built in DAC
or
a USB-C PD car charger with built in USB HUB (That we can connect a DAC to)
Unfortunately manufacturers seem confused about USB-C but it does open up some interesting possibilities

lc084302 said:
Hello, just got the XL. Has anyone tried using external DAC/Amp like the Audio Quest Dragonfly with the OTG dongle or found any that works?
Click to expand...
Click to collapse
I am using http://hifimediy.com/DACs/ready-made-dacs/Sabre-9018-Type-C-DAC with my Pixel-XL. It works well, but is about as noisy as the Nexus 6p with high efficient Balanced Armature IEMs. Its only noticeable on really quiet tracks in a super quiet room. It works well with my Sennheiser HD 595s and Beyerdynamic DT 990 250 ohm and 600 ohm.
I only wish it had USB-C PD pass-through so that I could charge and listen at the same time.

kirdroid said:
Dragonfly works fine here .. No issues.
Click to expand...
Click to collapse
Does the Dragonfly work without the anker dongle by just using the small dongle supplied with the Pixel?

Dragonfly only works for me with a USB audio player pro as the media player to make it work.

My FiiO does not work. Exact same setup works on Nexus 6P however.
Not sure what the issue is. Tried two different USB-C to USB-B adapters, neither work.
FiiO powers on, but just basically static noises.

Yes there seems to be a problem without the special media player to drive the devices. I was surprised my Dragonfly didn't work after kirdroid indicated that his is working without a USB audio player.