 |
|
| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
| Reply |
|
|
LinkBack | Thread Tools | Display Modes |
|
#1
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
Modifying a USB cable to charge iPod without PC connection
http://www.gizmodo.com.au/2008/07/si..._ch argers-2/
+5V ---50k --- D- | 10k | GND ---40K --- D+ Is this safe? Would it work? -- @~@ Might, Courage, Vision, SINCERITY. / v \ Simplicity is Beauty! May the Force and farces be with you! /( _ )\ (x86_64 Ubuntu 9.10) Linux 2.6.38.4 ^ ^ 22:00:02 up 5 days 2:01 1 user load average: 1.10 1.08 1.05 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
|
#2
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
|
Modifying a USB cable to charge iPod without PC connection
On Apr 29, 7:04*am, Man-wai Chang wrote:
http://www.gizmodo.com.au/2008/07/si..._charger_units... +5V ---50k --- D- * * * * * * * * | * * * * * * * *10k * * * * * * * * | GND ---40K --- D+ Is this safe? Would it work? Show your work -- why make people duplicate your analysis? |
|
#3
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
|
Modifying a USB cable to charge iPod without PC connection
+5V ---50k --- D-
| 10k | GND ---40K --- D+ Show your work -- why make people duplicate your analysis? I dont' wanna kill my iPod Touch...  -- @~@ Might, Courage, Vision, SINCERITY. / v \ Simplicity is Beauty! May the Force and farces be with you! /( _ )\ (x86_64 Ubuntu 9.10) Linux 2.6.38.4 ^ ^ 23:40:01 up 5 days 3:41 1 user load average: 1.00 1.04 1.05 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
|
#4
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
|
Modifying a USB cable to charge iPod without PC connection
On Apr 29, 8:44*am, Man-wai Chang wrote:
+5V ---50k --- D- * * * * * * * * *| * * * * * * * * 10k * * * * * * * * *| GND ---40K --- D+ Show your work -- why make people duplicate your analysis? I dont' wanna kill my iPod Touch... Why not just use the two resistor dividers your link claims do work? |
|
#5
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
|
Modifying a USB cable to charge iPod without PC connection
On 29 abr, 10:04, Man-wai Chang wrote:
http://www.gizmodo.com.au/2008/07/si..._charger_units... +5V ---50k --- D- * * * * * * * * | * * * * * * * *10k * * * * * * * * | GND ---40K --- D+ Is this safe? Would it work? -- * *@~@ * Might, Courage, Vision, SINCERITY. * / v \ *Simplicity is Beauty! May the Force and farces be with you! /( _ )\ (x86_64 Ubuntu 9.10) *Linux 2.6.38.4 * *^ ^ * 22:00:02 up 5 days 2:01 1 user load average: 1.10 1.08 1.05 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA):http://www.swd.gov.hk/tc/index/site_...sub_addressesa Seems to me that this mod should work. All that this mod does is to put some voltage in D- and D+ pins, and that voltage will never be greater than 5V, so I don´t see why it will not work. Just give it a try. You won´t fry anything. |
|
#6
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
|
Modifying a USB cable to charge iPod without PC connection
I made an iPod charger to run off 4 AA batteries using a similar divider.
Not sure why you are modifying the example given, but the values are not especially critical. Any reason you can't measure the output? .. "Man-wai Chang" wrote in message ... http://www.gizmodo.com.au/2008/07/si..._ch argers-2/ +5V ---50k --- D- | 10k | GND ---40K --- D+ Is this safe? Would it work? -- @~@ Might, Courage, Vision, SINCERITY. / v \ Simplicity is Beauty! May the Force and farces be with you! /( _ )\ (x86_64 Ubuntu 9.10) Linux 2.6.38.4 ^ ^ 22:00:02 up 5 days 2:01 1 user load average: 1.10 1.08 1.05 ???! ???! ???! ???! ???! ???! ????? (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
|
#7
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
|
Modifying a USB cable to charge iPod without PC connection
On 2011-04-29, Man-wai Chang wrote:
http://www.gizmodo.com.au/2008/07/si..._ch argers-2/ +5V ---50k --- D- | 10k | GND ---40K --- D+ Is this safe? Would it work? As you're not putting more than 3.3V on the data lines it looks fine to me. There's a standard for power-only USB sockets. it's basically 5V and some resistors, I'm not sure how close to it that layout it is, I'd research and try the standard way first. -- 100% natural |
|
#8
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
|
Modifying a USB cable to charge iPod without PC connection
On 2011-04-29, Man-wai Chang wrote:
http://www.gizmodo.com.au/2008/07/si..._ch argers-2/ +5V ---50k --- D- | 10k | GND ---40K --- D+ Is this safe? Would it work? At initial glance it seems good, but I haven't read the whole USB charging specification. http://www.usb.org/developers/devcla...rging_V1_2.zip |
|
#9
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
|
Modifying a USB cable to charge iPod without PC connection
At initial glance it seems good, but I haven't read the whole USB
charging specification. http://www.usb.org/developers/devcla...rging_V1_2.zip Too much information.... -_-" Are you saying that the voltage over D+ and D- should be smaller than 2.0V and 2.5V respectively? -- @~@ Might, Courage, Vision, SINCERITY. / v \ Simplicity is Beauty! May the Force and farces be with you! /( _ )\ (x86_64 Ubuntu 9.10) Linux 2.6.38.4 ^ ^ 18:57:01 up 5 days 22:58 1 user load average: 1.01 1.06 1.05 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
|
#10
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
|
Modifying a USB cable to charge iPod without PC connection
On 2011-04-30, Man-wai Chang wrote:
At initial glance it seems good, but I haven't read the whole USB charging specification. http://www.usb.org/developers/devcla...rging_V1_2.zip Too much information.... -_-" Are you saying that the voltage over D+ and D- should be smaller than 2.0V and 2.5V respectively? The only maximum voltage number I saw quoted for those pins was 3.6V I skimmed it, mostly I did searches and looked at the diagrams. -- 100% natural |
| Reply |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| iPod charge voltage? | Electronics Repair | |||
| electrcity connection charge | UK diy | |||
| electrcity connection charge | UK diy | |||
| electrcity connection charge | UK diy | |||
| new ipod battery doesn't hold a charge | Electronics Repair | |||
Linear Mode
