FX loop box, switching question

[MadSkillzMan]

hey guys, question.

Id like to rig up a little box with 3 FX loops, A B and C if you will.

pretty much id like it so that when i step on a switch, it will deactivate the other 2, and only turn on the one ive stepped on.

How can this be done simply?

I want it to kind of behave like an amp's channel footswitch

thanks in advance!

[RaceDriver205]

Its not that simple, im afraid. I posted some design before: one using relays and switches, and one using minimum CMOS ICs. Try and search for them, I haven't time to find them at the moment. When I do have time I'll be able to help you more.

[Seljer]

I figured this thing out a while ago:
if you can get latching relays, then you can do it rather easily. You just wire 3 momentary switches to turn on one of the relays and turn off the other 2, use diodes to direct the flow of the signal.

if you don't want to use latching relays then you can do it SR flipflops, there are many ways you can make one, a CD4013 has got 2 of them, you can make one out of 2 NAND gates, you can make them out of discrete components (like in the Boss pedals), and in the same way before, you've got 3 of them, and for each switch, yet set it up turn turn on one of them and turn off the other. Then with the signals from their outputs you control your actual signal switching.

Heres what I came up with a while ago for some other person on here: http://www2.arnes.si/~spribe/slike/flipflopabswitch.GIF
in your case forget about the AB and the / switches and the diodes they are connected to. Copy one of the flip flop sections and connect up the switches to it (eg: switch A goes to SET on the first, RESET on the second and RESET on the third, switch C would go to RESET on the first, RESET on the second and SET on the third)

[MadSkillzMan]

Using diodes to direct the flow of current, im still a newb, but that almost makes sense..since the switchbox in my carvin amp, the schems are nothing more than, well i think, momentary switches (though they do click hard) and each switch has a diode (LED)