Endgroup michael karas feb 28 16 at 15 12.
Relay switch box usb.
Then they make simple usb power switch ic chips that can be very handy to use for use.
Numato s 1 channel usb powered relay module provides exceptional value for money.
Use 1 mux chip and two of the power switch ics and you will not require any relays or relay coil drives and catch diodes.
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It has one onboard 5v dc relays that can switch up to 2a load.
The relays are controlled by usb capable microchip pic microcontroller pic18f14k50 and come with built in firmware that supports simple commands to control relays and read relay status.
Flexible use the relay switchbox usb is designed for anybody working in project dubbing or post production studios who needs visual confirmation of when a recording begins or ends.