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Relay switch box usb.
It has one onboard 5v dc relays that can switch up to 2a load.
Numato s 1 channel usb powered relay module provides exceptional value for money.
The relay switch box usb can work without a power supply as it is connected and powered via just a 5v usb port.
Endgroup michael karas feb 28 16 at 15 12.
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.
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.
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.
2 channel micro usb relay module is equipped with a stable usb to serial port chip and a microcontroller.