Help with loop switch pedal. Series/Parallel

[Buffalo Tom]

So here is what I wanna do.

* 3 audio loops
* Bypass switch for each loop
* Series/parallel switch for the loops. It can be one switch that change the state of all three loops or a separate switch for each loop.

I will use the keeley mixer with some tweaks.
http://www.robertkeeley.com/manuals/Keeley_Parallel_Mixer.pdf

But the really hard part here is to figure out how to do the switching between loops in parallel or series combined with the bypass of the loops.

I really cant figure out how to do it.
Do you guys have any idea?

Thanks

[aefpv]

I used this schematic to make a parallel blender. You can add a toggle switch after the input of the 1st loop to switch between series and parallel blending. The website does not have the toggle modification.

http://www.runoffgroove.com/splitter-blend.html

[Buffalo Tom]

This is where I am at the moment... Sorry for the messy drawing. It seems very complex but maybe I got it right? Is there a simpler solution? Im planning for a dry feed in the mixer too and that must be muted in the series mode. I can expand the 4PDT switch with a relay or use a separate kill dry switch for that function.



(no difference in black/red lines.. different colors just to make it easier to follow)

[ElectricDruid]

If I were you, I'd separate the switching diagram from the wiring diagram. Trying to keep track of what goes where with a wiring diagram is a nightmare. Draw the switch poles out. When you've got a working layout, you can convert it to a wiring diagram. At that point, that's just "how do we implement this?" and you should know how many switches of how many poles you'll need.

The bypass switching is simple enough - that's a DPDT for each pedal, or 3PDT if you want an LED too.

From your diagram, you want to switch between three effects in series to three effects in parallel, right?

It should be possible with your 4PDT switch. The first pedal always takes its input from Send1. The third pedal always sends its output to Return3. That leaves four places that have two options:

Pedal 1 Output: Switches between Return1 (parallel) and Pedal 2 input (series)
Pedal 2 Input: Switches between Send2 (parallel) and Pedal 1 output (series)
Pedal 2 Output: Switches between Return2 (parallel) and Pedal 3 input (series)
Pedal 3 Input: Switches between Send3 (parallel) and Pedal 2 output (series)

So I reckon you need three 3PDTs, and one 4PDT. Which is what you've got, so I think you're basically there.

HTH

[Buffalo Tom]

If I were you, I'd separate the switching diagram from the wiring diagram. Trying to keep track of what goes where with a wiring diagram is a nightmare. Draw the switch poles out. When you've got a working layout, you can convert it to a wiring diagram. At that point, that's just "how do we implement this?" and you should know how many switches of how many poles you'll need.

Thanks! This one is easier to understand. Only did the first bypass switch but the procedure should be the same... The only problem I find is that if the switch is set for parallel mode loops that are bypassed is still feeding signal to mixer returns and thats bad. So I need one more pole and mute mixer return for loops thats off. Like the previous chaos drawing... This is going to be a challenge to build.

[ElectricDruid]

Nice diagram! That's much better, that makes it pretty obvious what's going on.

Your point about the bypass switching is a good one. Essentially it needs to do two different things depending on which mode we're in: bypass the pedal when in series, and cut the output when in parallel. I can't see a simple way to do that across three separate switches, but maybe something will occur. Hummm, have to think about it.