Can USB port be used to provide constant voltage out?

Hello, 

I'm thinking of buying a node 2024 but want to ensure I can turn my amp on and off with it.  My amp is an old Denon, sounds great but has no trigger in's and the power uses a latch switch, therefore could be left in on position.  I looked at the Iot Relay but it seems to require a constant voltage to keep the relay on.  I would assume the trigger coming out of the node is only a pulse therefore wouldn't work.  

I thought the USB port might work that it could provide constant voltage to the relay but only if the usb turned on and off as the node came out/in  of standby.  I would appreciate any thoughts on this or if anyone has solved the problem else wise.  

As a general note, this should be a use configurable  feature in bluOS where one can send a pulse or constant power.  I imagine there are many others out there that have spent thousands of dollars on vintage amps and won't use something like a node because they need to turn the amp on and off manually.

Thanks,

RP