[sdiy] Switching on a negative powerline with a positive source

[Karl Ekdahl]

Hi all, i'm having a small problem; i'm currently
fitting a CV out circuit to a SK-1 and i want to be
able to use the internal SP/ST power switch to switch
on/off my own -9v that i need for the d/a. I just need
a small semiconductor-based circuit. I recently got a
number of FETs that i guess could come in handy for
such a task, but unfortunley i'm not familiar enough
with these devices yet to be able to use them in an
intelligent way...

thanks

Karl