Prefacing this with the fact that I am EXTREMELY non-technical, so any answer or solution involving technical expertise will get me in over my head very quickly.
I currently use a 0/0/4 phidget to control power to turn on and off to a hobby/club slot car track I have. It is connected via USB to my laptop, which runs a Race Management software. This software is set for heat lap duration which signals the phidget when to turn the relays on and off.
Everything works fine. Even I figured out how to get it going, which is saying something.
My problem is that I've purchased a couple of brand new phidgets identical to the 0/0/4 I have for the purpose of swapping out if there is a failure during a race. Race day might have 16 guys, and a failure of the race management system can create real issues.
The problem is that neither of my brand new, identical to the one that is installed and working, actually 'works.' I plug in the USB cable...the same used on the unit that works, plugged into the same USB port that sends the working signal. When I manually turn the power on/off through the software, the original works just fine. Neither of the other two work at all, even though the software sends a message that it has detected each of the new phidgets.
Any idea why identical, brand new phidgets won't work when swapped out for an identical working one?