[Consulta] Coriente por el usb

Hola queria saber si es posible alimentar un acces point por el usb, osea sacar 12v, he visto que hay parlantes que sacan la corriente el usb y me gustaria hacer lo mismo, ya que seria para una notebook donde debo usar un ap para conectarme a internet

no sera la mejor respuesta, pero se que se puede sacar solo 5 volts

Pinout
_________
l_4_3_2_1_l

______
l 1 2l
l l
l_3___4l


Series "A" plugs are used towards the host system and series "B" plugs are used towards the USB device.

Pin Name Description
1 VBUS +5 VDC
2 D- Data -
3 D+ Data +
4 GND Ground

Features:

* True Plug'n'Play.
* Hot plug and unplug
* Low cost
* Easy of use
* 127 physical devices
* Low cost cables and connectors
Bandwidth:

* High speed: 480 Mbps speed (in USB 2.0 and above)
* Full speed: 12 Mbps speed (requires shielded cable)
* Low speed: 1.5 Mbps speed (non-shielded cable)

Definitions:

USB Host = The computer, only one host per USB system.
USB Device = A hub or a Function.
Power usage:

Bus-powered hubs: Draw Max 100 mA at power up and 500 mA normally.
Self-powered hubs: Draw Max 100 mA, must supply 500 mA to each port.
Low power, bus-powered functions: Draw Max 100 mA.
High power, bus-powered functions: Self-powered hubs: Draw Max 100 mA, must supply 500 mA to each port.
Self-powered functions: Draw Max 100 mA.
Suspended device: Max 0.5 mA
[edit] Voltage:

* Supplied voltage by a host or a powered hub ports is between 4.75 V and 5.25 V.
* Maximum voltage drop for bus-powered hubs is 0.35 V from it's host or hub to the hubs output port.
* All hubs and functions must be able to send configuration data at 4.4 V, but only low-power functions need to be working at this voltage.
* Normal operational voltage for functions is minimum 4.75 V.

Shielding:

Shield should only be connected to Ground at the host. No device should connect Shield to Ground.
Cable:
Shielded:

* Data: 28 AWG twisted
* Power: 28 AWG - 20 AWG non-twisted

Non-shielded:

* Data: 28 AWG non-twisted
* Power: 28 AWG - 20 AWG non-twisted

Power Gauge Max length
28 0.81 m
26 1.31 m
24 2.08 m
22 3.33 m
20 5.00 m


Cable colors:

Pin Name Cable color Description
1 VBUS Red +5 VDC
2 D- White Data -
3 D+ Green Data +
4 GND Black Ground


si lo quieres ver mejor aqui esta el lnk hacia el "harwarebook"

http://www.hardwarebook.info/Universal_Serial_Bus_(USB)

y aqui tienes un explicacion muy detallada de la historia y funcionamiento del usb

http://www.zator.com/Hardware/H2_5_3.htm

esperoque te sirva la info!