bit-tech.net

Go Back   bit-tech.net Forums > Modding > Modding

Reply
 
Thread Tools View Mode
Old 14th Jan 2007, 04:02   #1
Warrior_Rocker
Holder of the sacred iron
 
Warrior_Rocker's Avatar
 
Join Date: Jun 2005
Location: Tallahassee, FL
Posts: 938
Warrior_Rocker has yet to learn the way of the Dremel
Motorola Razr V3c: DIY Charge Cable

View the updated project log on my personal site, XodusTech.com

As many of you know the Motorola Razr has a built in mini-usb jack. Allowing for standard cables to plug into the jack to transfer settings and to charge the phone. However some providors such as Verizon have locked the jack requiring that special drivers be used to allow the phone to charge when plugged into a computer. The reasoning behind this escapes me. This also means that if you bought a standard USB car charge adapter for other devices it will not work with the Razr. You have to purchase the charger specifically for the Razr. Since I own a horde of USB devices having a special charger for each device simply will not do.


I recently was given a brand new wall charger for my phone, as such that opened up the idea of using the old charger as parts to build a car / universal charger for my phone. Read on to learn how I turn the Left into the Right


Here is the completed cable, With standard usb plug on one end and mini-usb on the other

Now you may be wondering, why not use a USB cable with these plugs on it already. And to answer that may take some explaining. If you simply input 5 volts into this Razr you will get an error stating "Unauthorized Charger". This is a problem since it complicates the way the phone charges. However something interesting that I found out about the usb cable coming from the wall charger is that it has 3 wires. Black (ground), Red (+5v), White... The function of which I can only guess was to authorize the wall charger for use with the phone.



Interestingly enough if you simply connect the black and red wires to ground and a +5v source respectively the phone starts to charge and gives no error for "Unauthorized Charger". There is something about the cable that comes connected to the wall charger that is different than a regular mini-usb cable. My only guess is that two or more pins are connected on the end mini-usb plug to signal to the phone that the cable is authorized. Sort of a failsafe should the charger fail to signal.

Simply cutting away the white wire is all you have to do. Now we can build a cable with a standard USB head to allow its use to charge on ANY desktop and ANY car usb charger. Neat huh?




At the end you get the sweet success of the charging banner on the Razr.

Note: In case you didnt read any of the text in the post and are wondering why I did this. It is because to use a standard USB-A to USB-MINI cable you need to install the Motorola Drivers on the host pc. If you tried to use the cable in the car, the phone would not charge. That is the purpose of this cable. To allow Universal Charging.

Also this cable could be used to charge other devices with usb-mini jacks that charge via usb.

Thanks for taking a look

Last edited by Warrior_Rocker; 26th May 2012 at 18:38.
Warrior_Rocker is offline   Reply With Quote
Old 14th Jan 2007, 04:47   #2
DreamTheEndless
Gravity hates Bacon
 
DreamTheEndless's Avatar
 
Join Date: Jan 2004
Location: Portland Oregon USA
Posts: 1,554
DreamTheEndless has yet to learn the way of the Dremel
FYI - On a mac, you don't need a driver to charge the razr - you just plug it in and it charges.
__________________
Srenob is deader than dead, so check out my new blog instead:
http://i-have-a-blog-now.blogspot.com/
(Note - there's not much there yet, but maybe there will be someday.)
DreamTheEndless is offline   Reply With Quote
Old 14th Jan 2007, 05:03   #3
phelan1777
Minimodder
 
Join Date: May 2006
Location: Phila, PA
Posts: 32
phelan1777 has yet to learn the way of the Dremel
__________________
CaSe..Cm StAcKeR 810 (My work in progress)
Stacker SLACKER Thread
Quote:
I reject your reality and substitute it with my own. Adam- Myth Busters
phelan1777 is offline   Reply With Quote
Old 14th Jan 2007, 16:00   #4
Warrior_Rocker
Holder of the sacred iron
 
Warrior_Rocker's Avatar
 
Join Date: Jun 2005
Location: Tallahassee, FL
Posts: 938
Warrior_Rocker has yet to learn the way of the Dremel
Quote:
Originally Posted by DreamTheEndless
FYI - On a mac, you don't need a driver to charge the razr - you just plug it in and it charges.
Are you sure about that. Every single Razr. Because some of them produced by cingular (mainly GSM) do not require the drivers at all to charge.

Keep in mind how extensively diverse the Razr line of phones are. Just one example is mine has a 1.3mpx camera. While the cingular version has a .3mpx camera.
Warrior_Rocker is offline   Reply With Quote
Old 14th Jan 2007, 21:13   #5
DreamTheEndless
Gravity hates Bacon
 
DreamTheEndless's Avatar
 
Join Date: Jan 2004
Location: Portland Oregon USA
Posts: 1,554
DreamTheEndless has yet to learn the way of the Dremel
I'm not completely sure, but my razr won't charge on my desktop at home without motorola phone tools installed and on my macbook pro it would charge when I plugged it into my mac when booted into os x but it wouldn't charge when booted into windows on the macbook pro until I installed the motorola software.

__________________________________________________ _
To make that more clear:
Code:
					no drivers installed	driver installed
home built desktop running windows	doesn't charge		charges
macbook pro booted into windows		doesn't charge		charges
macbook pro booted into OS X		charges			N/A
__________________
Srenob is deader than dead, so check out my new blog instead:
http://i-have-a-blog-now.blogspot.com/
(Note - there's not much there yet, but maybe there will be someday.)

Last edited by DreamTheEndless; 14th Jan 2007 at 21:20. Reason: clarification
DreamTheEndless is offline   Reply With Quote
Old 14th Jan 2007, 22:11   #6
Warrior_Rocker
Holder of the sacred iron
 
Warrior_Rocker's Avatar
 
Join Date: Jun 2005
Location: Tallahassee, FL
Posts: 938
Warrior_Rocker has yet to learn the way of the Dremel
Interesting info. What type of Razr do you have. Can you try to see if the phone charges when no os is booted at all. ie: at the post screen?


If I get a chance I will try my phone out on a Mac and see if I can produce the same results.
Warrior_Rocker is offline   Reply With Quote
Old 14th Jan 2007, 22:18   #7
DreamTheEndless
Gravity hates Bacon
 
DreamTheEndless's Avatar
 
Join Date: Jan 2004
Location: Portland Oregon USA
Posts: 1,554
DreamTheEndless has yet to learn the way of the Dremel
I don't know what model it is. I will try it sometime soon on the screen that lets you select which drive you want to boot off of. (The mac doesn't really have a 'post' screen to speak of.)
__________________
Srenob is deader than dead, so check out my new blog instead:
http://i-have-a-blog-now.blogspot.com/
(Note - there's not much there yet, but maybe there will be someday.)
DreamTheEndless is offline   Reply With Quote
Old 16th Jan 2007, 17:54   #8
phelan1777
Minimodder
 
Join Date: May 2006
Location: Phila, PA
Posts: 32
phelan1777 has yet to learn the way of the Dremel
Yeah, I second the notion of RAzr not charging on XP machine wiht out Phone tools. The PC would not see my phone, but did see a USB device and I didnt think about trying to charge it either, but I would have noticed the battery symbol flashing.

After I got a hold of Phone tools and the drivers installed did it start charging.
I have a cingular Razr.
__________________
CaSe..Cm StAcKeR 810 (My work in progress)
Stacker SLACKER Thread
Quote:
I reject your reality and substitute it with my own. Adam- Myth Busters
phelan1777 is offline   Reply With Quote
Old 29th Feb 2008, 04:30   #9
bfisch1983
What's a Dremel?
 
Join Date: Feb 2008
Posts: 1
bfisch1983 has yet to learn the way of the Dremel
Thanks

I just wanted to thank you for your posting. Recently my verizon V3c (2 years old) started displaying "unauthorized charger" even though I am using the Motorola charger that came with it and has always worked. I cut back the insulation and saw red, black, and yellow wires. So I cut the yellow one and it works now! That was easy.
bfisch1983 is offline   Reply With Quote
Old 29th Feb 2008, 13:19   #10
jhanlon303
The Keeper of History
 
jhanlon303's Avatar
 
Join Date: Sep 2006
Location: Box under a Bridge, Iowa
Posts: 9,270
jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.jhanlon303 is the Cheesecake. Relix smiles down upon them.
I wonder if this would work on my new Sanyo S1? It is pretty new to the US carriers and all I can find is a wall charger. Now I'm thinking again.
John
__________________
Coming to a forum near you. January 2014.
jhanlon303 is offline   Reply With Quote
Old 18th Jun 2011, 16:24   #11
Yona
What's a Dremel?
 
Join Date: Jun 2011
Posts: 1
Yona has yet to learn the way of the Dremel
I have the same problem you had. However, I have the origanal USB mini cable. Maybe I am not understanding what you did, but I have plugged my L6 into several gneric USB chargers and it does not work. It only works on my PC with the drivers running. I don't think the difference is just in the cable, else it would work in from any USB power source.
Could please give more detail as to exactly what you did with the cables? Or with the 3rd white wire?
Yona is offline   Reply With Quote
Reply

Thread Tools
View Mode

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 12:59.
Powered by: vBulletin Version 3
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.