Switch Mod Beavis drawing

[Sophia2001]

Hi all,

I would like to build the following switch pedal. Pedal 1 = compressor. I would like to have the option the place it in front, in between or after Pedal 2 & 3 without changing all the cables. So basically:

Switch 1 OFF and switch 2 OFF
Pedal 3 - Pedal 2 - Pedal 1

Switch 1 ON and switch 2 OFF
Pedal 3 - Pedal 1 - Pedal 2

Switch 1 ON and switch 2 ON
Pedal 1 - Pedal 3 - Pedal 2

I found this great drawing from Beavis. I do not need the LED indicator. My question is: how do I mod the schematic below to my needs? Can someone make a drawing for me?



Thank you!!!

Sophia

[antonis]

I think you don;t understand the way XPDT switches work..
(X indicates poles and D(ual) indicates throws..)

In a 4PDT switch, ALL midle row lugs can be connected with ALL respective Upper or Lower lugs (in a vertical mean)

See how it works for a 3PDT one..


Beavis Effect Order Switches concerns the order of only two effects (A -> B  or B -> A)

[ElectricDruid]

If you're going to do this with two switches, you've got *four* combinations. So what happens with the fourth one?

If one of the switches was an order switcher, like the Beavis one you posted, that could swap the order of Pedal 1 and Pedal 2.

Then the other switch has to select between Pedal 3 in front, or Pedal three between the other two. That sounds like another 4PDT to me.

I think it can be done, but the wiring will be an error-prone nightmare.

[Sophia2001]

Thanks Antonis/ElectricDruid,

There are many schematics for 2 pedal order switching but not for 3 pedal order switching.

Something like this: (source: geofex.com). However, the schematic below is not clear to me how it works and if it fits my needs.


Anyone how can help me with the correct schematic? (see first post)

Thanks!
Sophia

[ElectricDruid]

I've been thinking about this a bit more, and there's a problem with what I proposed above (two switches, one to switch the order of 1 and 2, and the other to put 3 either in-front or in-between.

The problem is that in the usual order switcher circuit like the one you posted, there is no single wire that acts as the wire between 1 and 2 or 2 and 1. It's a different wire in those two cases. When it's just a wire, that doesn't matter. If we're trying to hack another set of switches in there so we can optionally add another pedal, it does, because it means we need to hack into different places depending on the position of the order-switcher. So it's not as simple as I thought.

This means we need *another* pole, so the order switcher becomes a 4PDT, even without the LED. And the same is true of the in-front/in-between switcher.

[Sophia2001]

Thank you again ElectricDruid. I appreciate your help! I understand your explanation, but I find it difficult to translate this into a correct schematic.

May I ask you to make a simple drawing of what the scheme will look like?

Thanks!
Sophia 

[Sophia2001]

Quick and dirty drawing. Will this setup work?



Sophia

[ElectricDruid]

No. The order switcher that is connected to the guitar will act to put Pedal 3 either in front of or behind pedals 1+2.

Here's one way to do it. There must be lots of others, and I'm not claiming that this is the simplest. There may be a better way.



In the top drawing, you see the order switching for Pedals 1 and 2. X and Y are "black boxes", one of which will be Pedal 3.

In the bottom drawing, you see the contents of the black boxes: Pedal three and another 4PDT switch, allowing you to move pedal three between the two positions and replace the missing position with a bypass link.

Now all you have to do is turn that into a wiring diagram! Good luck!

HTH