Como desativar uma porta USB

Question

Para o nosso Sistema de Posicionamento de Testes de RF (o exemplo ilustrativo ) Eu preciso adicionar um ventilador controlado por software. Eu gostaria de adicionar um fã como isso e simplesmente desligue a energia USB para ligar o ventilador & off.

Precisa

• Um método para ligar e desligar a energia da fonte USB para esse ventilador

Pergunta

• Como você pode desativar a energia de uma porta USB? Há hubs ou dispositivos USB especiais?
  • Encontrei comutadores mecânicos , mas estou procurando por software controlado! :)

Sistema de segmentação

• Window 7 Enterprise

Answer 1

Bem, há essa coisa , um hub USB controlado por software:

Software controlled USB hub with 2 host (upstream) connections and 4 fast-charging (2.5A) device (downstream) connections. Control data, power and current limits separately. Boost USB signal levels to account for difficult interconnection environments.

Depois, há este fórum :

YKUSH boards allow the user to selectively switch ON and OFF each of the USB devices connected to the Hub downstream ports. The control is done using an application in the host system (e.g., PC to which the YKUSH board is connected). Switching ON/OFF a YKUSH downstream port with a device connected to it has the same effect than physically Connecting/Disconnecting a Device to a port of a typical USB hub.

    

Answer 2

Obrigado pela informação no Yepush YKUSH Switchable Hub Ouroborus, que parece exatamente correto !! Eu também encontrei as seguintes soluções, armazenadas aqui para futuros investigadores :) -

Pintant

They “broke” a USB cable, got the red inner-cable to pass through the relay. Then using one USB port I control the relay and I can switch on and off the other USB device.

powerUSB

The four outlet power strip is designed for end users in mind for Automation, Power Saving and Remote Computer monitoring. The three of the four outlets are controlled through the software. In addition to conserving power, the unit allows users to control devices, appliances and lights through their computer. The money spent on PowerUSB is paid back within a months by savings in electricity bills. In addition, this power savings reduce the CO2 footprint on earth.

The PowerUSB has built in current sensor, making it a Power Meter to measure the power consumed by the attached devices.

The digital IO version of the power strip adds the input/output option to the basic model. The input from sensors can be programmed to switch on a motor or a light through the controlled power outlet. The output can be programmed to generate a clock pulse or switch on digital devices programmatically. The attached computer sees the digital input/output through the USB interface.

The watchdog version PowerUSB-watchdog monitors the attached computer/router for a timed heartbeat. This heartbeat is sent from an application in the computer. When the computer locks up for any reason, the heartbeat sent from the computer will stop. At this time the PowerUSB switches off and power resets the computer thus rebooting the computer/router. This feature is useful for remote computers and servers that need to be available on continuous basis.

The smart standalone model offers the functionality of power control without tied to the computer. The standalone power strip can be programmed by connecting to computer. The on times can be programmed for daily or weekly times. The attached peripherals can be switched off during non working hours. The LCD display shows the power consumed through the power strip.