DIY I/O Board…

[Coda]

How hard would be be? I have not clue about fancy pants I/O stuff. How does it work? Could I build one? Can I fit it in a 1590b?…

 

[Stickman393]

Like a studio rack type?

Typically it's just a bunch of jacks in line from the front to back. The back is typically connected to all the equipment, and the front is used to jump different sources to different inputs.

Really simple stuff. Or were you thinking of something else?

 

[benny_profane]

I have 1590b I/O boxes on the sides of my board. You can easily fit 8 isolated jacks (4 in, 4 out) in a 1590b.

Edit: similar to what’s described here.

 

[Coda]

I guess what I’m thinking is true bypass loop switching.

 

[Stickman393]

Ah, that's easy. It can even be passive if you want with a DPDT for each switch.

 

[Stickman393]

OO <- return jack, send jack
XX <-output, input
OO <- connect these two with a wire.

That would be how to do it with a simple DPDT switch, viewed from the bottom.

 

[Coda]

How is each pedal wired in? Series? Parallel? Could I put buffers at each end? I guess my question is: is it as simple as it seems? Or am I missing something?

 

[Stickman393]

In a typical true bypass lopper, the signal is switching between two parallel paths. One re-routes the signal to the effect you want to bring in and out, the other is that little wire at the bottom of the switch.

These switches have two "throws" per pole, which means that the middle position of each column (or "pole") switches between connecting to the terminal directly above it and the terminal directly below it. The middle is "common", because it connects to both the top and the bottom. The top only connects to the middle, and the bottom only connects to the middle, but never at the same time.

 

[Coda]

In a typical true bypass lopper, the signal is switching between two parallel paths. One re-routes the signal to the effect you want to bring in and out, the other is that little wire at the bottom of the switch.

These switches have two "throws" per pole, which means that the middle position of each column (or "pole") switches between connecting to the terminal directly above it and the terminal directly below it. The middle is "common", because it connects to both the top and the bottom. The top only connects to the middle, and the bottom only connects to the middle, but never at the same time.

Right. I’m no stranger to footswitches. Basically, all this type of system does is make the actual switching a little more efficient in that all the switches are in the same spot, more or less.