Automatic Joy to Mouse switch

[exxos]

i can be betatester and first owner...
small sugestion, all signal what you need is in 3 legs crystal filter before db9 mouse/joystick signal....

I would design it as a external box like the one in the image. But you could solder wires and wire internally as well.

[MicromaX]

that device i can buy in my country by 10 euro. smd mount is better and smaller.

[exxos]

that device i can buy in my country by 10 euro. smd mount is better and smaller.

Probably no point me designing one then as I couldn't build for that price.

[MicromaX]

i need better quality, not lower price.

[exxos]

i need better quality, not lower price.

Better in what way ?

I did think about the design, Not sure exactly whats going on with the diagram your posted. Though if all lines were switched, it would need dual 6 way multiplexers.

I did wonder about just switching the 5V and 0V instead... Then a SR latch for AB select. Could all be mashed into a single small GAL.