This switch which is actually a 5v pow.
Usb powered relay switch.
It has one onboard 5v dc relays that can switch up to 2a load.
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The relays are controlled by usb capable microchip pic microcontroller.
Sunfounder wifi relay usb dc 5v relay module smart home wireless switch controller with app ba applied to access control turn on pc garage door learning program 4 4 out of 5 stars 84 12 88 12.
I m looking to control a mains powered light from a simple relay switch connected via usb to the computer.
I ll show you how to build a dirt cheap usb powered switch.
The relay switch isn t even a usb device it s just a simple switch that requires the usb voltage to turn it on.
If i attach the red wire from usb 5v to s1 and the ground from the usb cable black to ground the indicator led flickers and then dies.
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Ever need to power on a device when your computer is on.
2 channel micro usb relay module is equipped with a stable usb to serial port chip and a microcontroller.
Inline 5v usb on off power switch for arduino raspberry pi 18 5 cm 3 59 3 59 unit free postage.
It can use the serial port debugging software to send serial commands on the computer to control the opening and closing of the 2 channel relay.
The relays are powered from the usb bus so it is important to connect this board directly to a pc or to a powered hub.
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New usb hub expansion splitter with on off switch 4 port usb 2 0 multi hub black.
Numato s 1 channel usb powered relay module provides exceptional value for money.