If i wanted to design a simple rf remote controlled usb switch, is there an easier/less components required way to do this, than taking a 4x rf relay, and having each one of those relays cascade trigger 4x small dc relays to switch on/off the 4 usb pins?
IE, using the main rf relay board, to parallel close 4x small relays to open a a circuit to the shared usb device, doing it this way, means 16 relays, (4x rf spst's, then 4x relays per usb channel switched, for this application i need 3 usb inputs).
Basically is there a more simple way to design such a switch, using fewer components, and only allowing one usb input to be attached to the shared device at a time?
I want to run 3 computers usb to a switchbox, to share a usb->optical 96khz 24bit dac (well not really a dac, since its optical digital out, but thats how they are marketed). Then be able to only have to use one toslink input on a digital amplifier, since theres only two optical inputs, and i'd like the other for an adc module for an analog input to the amp.
Something tells me theres an easier way to do this than cascading relays, witch if done that way, would offer no protection in the event two inputs were switched on at the same time. I'd like some way to make sure that only one input can be connected to the "dac" card at a time, granted it would be parallel dc, so theres no overvolt risk, but i don't think its wise to risk it either, factoring in the cost of the usb->toslink adapter.
Do i even need 4 relays, or is there some kind of ic i can use to switch usb channels from a a momentary rf trigger coming from a single button rf remote?
The idea, is to be able to pack all this into an aluminum chassis, and with one rf multi channel remote, be able to switch 3 usb inputs to the usb->toslink adapter using only one rf channel, and switch on a smps ac -/+ lines, with a delay trigger to connect the dc load (the ddx320 digital amp) after the smps gets a few seconds to power up so i can get away with using the lowest channel count rf remote as posssible.
Ideally in this case, a 2 channel rf control/reciever module. one channel to switch on a beefy spdt(or parallel spst) to switch the ac mains, and the delay circuit for the load connect, two more beefy spst/one spdt for the 35v 9.6a dc out from the smps to the load (d-amp); the other channel triggering some kind of circuit that uses momentary logic to switch a usb device to 3 different computers, so i only have to buy one usb->optical module since the one i want isn't exactly cheap.
Any circuits that can do this, or ideas as to how to implement such a rf control system for ac power switching with a delay circuit to switch a dc load to the smps that is being turned on, and channel shifting between 3 computers usb inputs, ideally using a 2 channel rf remote device?