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???
06/17/10 13:44
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 		 #176732 - USB has provisions for 1.8A from charger ports
Responding to: ???'s previous message
It is more fun than that.

USB has been established as "the" way to power mobile equipment.

There are huge number of flashlights, battery chargers etc drawing power from the USB connector.

There are special wall sockets combining mains power and USB connectors, to allow you to power your mobile phone similarly to how you power your laptop.

But the USB standard has been extended to also include Charger Ports, in which case a device can draw up to 1.8A from the port. This is used by the new mobile phone charging standard, where the phones are charged using a Micro-USB connector. 5V/500mA is only 2.5W, and way less than a normal mobile phone requires for a reasonably fast recharge.

See the Battery Charging document at:
http://www.usb.org/developers/devclass_docs/

List of 33 messages in thread
TopicAuthorDate
DC / DC Convertor            01/01/70 00:00      
   OK            01/01/70 00:00      
   that is not possible            01/01/70 00:00      
      Clarification            01/01/70 00:00      
         Select 9-12V with a capacity to supply up to 20mA            01/01/70 00:00      
            I think I see what is needed            01/01/70 00:00      
               Per forgot            01/01/70 00:00      
                  Incorrect....            01/01/70 00:00      
                     incorrect?            01/01/70 00:00      
   Getting power from the USB port            01/01/70 00:00      
      OK for Development            01/01/70 00:00      
         Required points clarified - thanks            01/01/70 00:00      
            trying again            01/01/70 00:00      
         re: OK?            01/01/70 00:00      
            The Curse Of Stuff That "Works" (sic)            01/01/70 00:00      
               USB has provisions for 1.8A from charger ports            01/01/70 00:00      
         I should know better, word of warning            01/01/70 00:00      
            Worse :(            01/01/70 00:00      
               Fuse?            01/01/70 00:00      
                  With picture            01/01/70 00:00      
                     And the external USB connectors?            01/01/70 00:00      
                     Is that really a PC motherboard?!            01/01/70 00:00      
                        Unusual USB connector.            01/01/70 00:00      
                           It all looks a bit "chunky"...            01/01/70 00:00      
                        It's a front panel board            01/01/70 00:00      
                     Both Ports??            01/01/70 00:00      
                        Yes, both ports            01/01/70 00:00      
                           Fusing S/B on main board            01/01/70 00:00      
                           Poor C6...            01/01/70 00:00      
               Bolt that stable door!            01/01/70 00:00      
      Really?            01/01/70 00:00      
         Standby?            01/01/70 00:00      
      RE: Getting power from the USB            01/01/70 00:00      

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