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.
Relay switch box usb.
The relay switch box usb can work without a power supply as it is connected and powered via just a 5v usb port.
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.
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.
Then they make simple usb power switch ic chips that can be very handy to use for use.
It has one onboard 5v dc relays that can switch up to 2a load.
Endgroup michael karas feb 28 16 at 15 12.
17 32 of 604 results for usb controlled relay arceli srd 05vdc sl c 1 way 5v relay module free driver usb control switch pc intelligent control 5v 1 channel 4 2 out of 5 stars 17.
2 channel micro usb relay module is equipped with a stable usb to serial port chip and a microcontroller.