The Ground is common, but the +5V are separate. One for each button the USB board emulates.
Heres another fantastic "artwork" I created in paint, that might explain a little better:
There is no joystick per se, the USB board "replicates" a joystick. The PC "sees" the USB board as a universal joystick with 32 buttons, 8 axis and a 4 way HAT switch. ( I only use 4 of the buttons for this setup)
**broken link removed**
The +5V connections are separate and go to the USB board. One for each joystick button to be emulated.
If I install switch 1 as a DPST switch, and connect that to the +5V for Switch 1 and the common ground that should work i think.
Switch 1 Open:
Ground circuit open
+5V signal circuit SW1 open
Switch 1 Closed:
Ground circuit closed (all the other buttons get grounded)
+5V signal circuit SW1 closed (signal sent to usb board)
If I have understood DPST switches right (one switch action opens/closes two circuits?), then this should work?
Added after 1 hours 26 minutes:
BTW, I have relized that drawing these diagrams in paint will not work in the long run. I plan to extend the circuit diagram in the future.
Is there any "circuit design diagram" applications out there?
I need something that is:
-Easy to use
-Preferably "drag and drop" design (f.eks a toolbox with typical switches and electrical symbols that you can drag and drop into your design)
-Don't need anything advanced
-Would be nice if it can calculate things for you, and be able to use a "virtual multimeter"
-Must be FREE!